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I don’t live in California but my state is experiencing the same. I love to garden, but summer has just become the dry season here, so it is pointless. You can irrigate, but the vapor-pressure deficit (VPD) when it is 100 degrees and 20% humidity makes plant growth almost impossible for anything but cacti. I think I’ll just have to move.

https://www.dimluxlighting.com/wp-content/uploads/2019/02/Le...

Try using a biodegradable hydrogel at the base of the roots.
Changing up the crop would probably be a good idea, either early and late crops or heat-adapted summer stuff.
>20% humidity makes plant growth almost impossible for anything but cacti

Have you considered planting trees around your fence?

Have you considered drip irrigation? It was designed with desert agriculture in mind. Shade can also make a big difference.
My garden has drip irrigation and looks like a burned mess unfortunately. I think it is just the effect of the hot dry air on the leaves.
You would need misters on a timer to up your relative humidity throughout the day. Drip irrigation can’t correct an oppressive VPD.
It might just be the sun burning your plants, which droplets of water would only make worse (by acting as a lens). Try hanging shade cloth above them. It's what I have to do here in California for tomatoes, especially at higher elevations
My wife is a master gardener at 5500' elevation in AZ. If the monsoon happens (50% chance) then there are two difficult months, May and June. June is the real bitch. Highs in the high 90s, hot winds out of the southwest everyday, and no clouds. If the monsoon fails (again 50% chance) then every month is difficult.

She grows many varieties of tomatoes, okra, blackberries, three kinds of eggplant, basil, cilantro, and many varieties of beans. It's AZ, so of course there is a cornucopia of chiles, and garlic.

Peaches and the other stone fruits are more dependent on the weather in Feb. (it snows here).

Here are the techniques: partial shade from large trees, shade cloth over seedlings, timers on the drip, and the drip runs three times a day in June. Missing a single irrigation day in June means death to the garden. She does have some spray heads but most of the garden is just drip. Oh, and you can't plant too early, we've lost an entire bed of tomato seedlings to frost in May! That seems like it's a diminishing problem, however. The soil is the kitchen/garden compost + a few bags of water retention garden soil every year.

I have seen gardens in Phoenix in the summer and the only possibility is full shade cloth over just about everything.

The water is just city water, it's expensive. $100/month May-Sep. Because we're food snobs, and the flavors and textures are so much better, it's worth it. There's a lot of work in the spring getting everything going, and we joke about the "garden nazi" in Sep-Oct, where the harvest pretty much demands constant processing (which I do). But the middle 3 months are less than 1/2 hr/day.

If you're curious about your local growing environment and how to deal with it, the local university agricultural extension are the goto folks. They literally exist to help you with this.

Thank you so much I will try some of these!

I have been reluctant to do shade cloth but I think I have to go there.

"If you have a string of dry years, that sets you up for low runoff efficiency in the next year," Jones said. "It is going to take above average precipitation to get average runoff."

In the short-run, meanwhile, the drier earth can amplify heat waves like the recent record-breakers in the U.S. and Canada. "Droughts lead to drier grounds, which lead to higher temperatures. It's a vicious cycle," Di Liberto said.

I didn't really consider this aspect of the climate feedback loop prior to reading this article.

Well, it won’t be not the first time that the center of civilization shifts due to climate change…

In Central Europe we are having rainy summers and mild temperatures. I would love having some neighbours from California in my summer house…

> I would love having some neighbours from California in my summer house…

Well, you're in luck. It won't just be Californians, though. You'll have new neighbors pouring in from all over the world, cramming up in the liveable spaces that'll be left. It's gonna be cozy. And who knows, maybe you'll even have to spare a room or two of your house for them? Just as Germans had to when the refugees from the former eastern territories poured in after WW2.

I was thinking more about exchanging gardening tips and salads. But please come over there is a lot of space from Vistula River to Ural and beyond… (we are rapidly depopulating)

Just drop the doom and Millenarian attitude…

https://en.wikipedia.org/wiki/Millenarianism

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> Just drop the doom and Millenarian attitude…

Not sure if you and I read the same IPCC report, tbh.

Doesn't sound likely. You will be able to settle tens of millions of refugees in Greenland, Siberia etc. Former frozen wasteland will become habitable. I don't think Europe or the U.S will volunteer to absorb tens of millions of refugees if there are other solutions.
> I don't think Europe or the U.S will volunteer to absorb tens of millions of refugees if there are other solutions.

Who said anything about volunteering? Europe couldn't stop ~1 million people from entering in 2015, so what makes you think they can stop 50 to 100 times that number?

> Greenland, Siberia etc. Former frozen wasteland will become habitable

"Billions of Acres of Cropland Lie Within a New Frontier. So Do 100 Years of Carbon Emissions: Crops grown on this land could feed a growing population. But if these soils are plowed, they could unleash as much carbon as the U.S. emits in more than a century." https://insideclimatenews.org/news/12022020/agricultural-fro...

There is a difference between wouldn’t stop and couldn’t stop, I don’t think Europe really tried that hard?
It's much like they US could have technically stayed in Vietnam forever, but they didn't, because there was no popular support at home.
Europe didn't try to stop them at all.
Europe - or Germany specifically - made a humanitarian decision to allow civilians, fleeing a civil war that had claimed half a million lives and displaced 5 million, refuge as per UN rules. They could easily have said no - like many most other European countries did.
Europe didn't try to stop the Syrian refugees, it obviously has the political and military capabilities to settle people elsewhere. One million is manageable without Europe collapsing, 30-50 million is a different story. BTW Europe has already made a deal with Turkey to host millions of refugees there (on Turkish soil) so this is already happening. I think the political will to host more refugees, let alone tens of millions, is about zero in Europe.
> Former frozen wasteland will become habitable

That former frozen wasteland will become one huge swamp. It'll take a whole lot of work to make it habitable by modern standards. That's assuming it doesn't just dry out and start a decade long peat fire that suffocates the area.

Where in Central Europe? Here (Slovakia) we have hot, dry summers.
Here in Bavaria, Germany, we just had and still have a normal German summer. Lots of rain, highest temperatures still below 30°C (86°F).

The rains are more violent though, sudden, lots of water in a short amount of time, high winds, right now even hail (just passed through half an hour ago and there is a warning out for worse conditions in some areas). In another state we just lost well over a hundred people to floods, which is a gigantic number. So there's that too.

Still, temperatures have been perfect. I got an A/C two years ago when we reached 40°C (104°F) which kept me cool for the two or three weeks when it was needed last year. It's just been standing in a corner this year, could have left it in storage.

I remember, going to school in the 1980s in East Germany, when the thermometer reached 26°C (77°F) by 10 am we would get the rest of the school day off ("hitzefrei" - "heat free") - if I remember that correctly (if not I'm not far off). It happened only a handful of times in my ten years at that school. -- https://de.wikipedia.org/wiki/Hitzefrei (German - showing the current state of that particular regulation for work places and schools, they depend on the state and what I see is similar to what I remember)

This years rains were enough for parts of West and most of South Germany to get enough water into the soil, but East Germany still counts as drought area, map; https://www.ufz.de/index.php?de=37937 -- Too bad that lots of East Germany has a lot of very large fields, so that's not good. Still better than the last few years that created those drought conditions.

Interesting, thank you. Yes, the rains are different here too, there is almost no quiet rain here anymore, it's violent and also it rains much less. Sometimes we go more than a month without any rain at all, which I could not imagine happening 10 or more years ago. Currently we are 100mm under the average on yearly basis, which combined with higher temperatures means everything is drier.

And of course there are more hot spells and they are hotter, last few days were around 33-34°C, which is becoming more and more common. Although we don't get 40°C, for now.

Kind of surreal to read that while living in SF where it’s constantly cold.
These droughts were anticipated, but here in California preparing for climate change means preaching at others, and setting up a carbon exchange. Not a single new reservoir has been built since 1979. It's impossible to take California seriously about much of anything, but especially not regarding the environment:

"In 1979, California’s population was a little more than 23 million. Today, it is more than 39 million. Yet in that entire time, California did not construct one additional, large-scale water storage project – meaning water infrastructure that once suited the state’s irrigation, livestock, and human needs has become chronically inadequate to meet its essential tasks."

https://www.nationalreview.com/corner/another-california-dro...

Not only does the state not prepare, but thanks to the record-setting wildfires of the past decade, the amount of carbon and soot pumped into the air has probably offset any gains that had been made. They're really just stupid out here.

Our reservoirs are empty. Why would another reservoir help up?

The fact is that California's urban water use has been declining since 1976, in absolute terms, not just in per-capita terms. The East Bay Municipal Utility District, for example, now only delivers half the water it delivered in 1976, despite the fact that the population in its service area has increased by 50% over that period. Conservation and efficiency are outpacing population growth. EBMUD now owns double the reservoir capacity it actually needs.

People who advocate for new reservoirs in California, especially people who advocate for it in East Coast editorial magazines, are representing the interests of agriculture megabusinesses who want to rip off the tax payers some more. Don't believe them.

"Our reservoirs are empty. Why would another reservoir help up?"

A serious question? More water in reserve = more water in reserve.

If you fill 4 glasses with water now, and then then EBMUD turns the water off for the rest of the day due to a broken main (I know EBMUD really well), you'll have 4 more glasses of water to drink than you would have, otherwise. Simple math, really.

OP's point is that you have two glasses now, which are empty. Another two to make four and you'll have four empty glasses.

You need to address the reason why they're empty. You said you know the system well, so do you mind explaining?

They’re empty now, but presumably they would not have been pre-drought, delaying the point when the current shortage begins.
You can't presume that. You have to show it. In particular, you have to show the new reservoir would capture water that would last long enough to matter.

It has been years since some of the large reservoirs were close to full. Where specifically do you believe new reservoirs should be built? And why do you do believe that they will capture water that keep from evaporating long enough to make a difference during the next drought cycle?

I don’t think it is a given that, this time, there will be a post-drought that fills the current reservoirs. If so, if extra reservoirs were built years ago, they would have been useful exactly once.

On top of that, that ‘useful’ could have been very limited. For example, shortening a half year drought by a week would not be worth anything if it just meant crops would die a week later.

You have to do some serious modeling on expected rainfall, the costs of reservoirs and water usage to figure out whether additional reservoirs are worth the investment.

So 100% of reservoir loss is due to evaporation? In the analogy, filling the glasses before EBMUD turns the water off is like filling a reservoir during (even brief) rainy seasons.
Think you would a better leg to stand on if California’s reservoirs actually filled up during the year.

As it stands California’s reservoirs never seem to fill completely anymore. Adding more reservoirs won’t help store extra water if it simply isn’t falling from the sky.

More reservoirs doesn't make more water in the first place. This is about how much that falls from the sky in the first place.

You should not stop all the water from reaching the ocean in the first place, bad things happen when you do that. We are reaching the point where we just have enough water to keep the rivers flowing so we don't kill all the wildlife that exists in them, we're not adding significant amounts of water to storage.

If you distributed the total available water to more reservoirs then the loss rate from evaporation would actually go up due to an increased ratio of surface area to volume. Simple math, really.
Building more reservoirs doesn't mean there's more water in reserve, it just means there's more space to store water.
The water cycle covers the entire state so as long as you don't set up in a desert or a hundred miles from the nearest waterway, chances are the reservoir can be filled up on a regular basis.

We're storing a teeny tiny fraction of all the water that goes through the system.

2 things.

One is you want to keep the rivers flowing in the first place. If you impound too much water, you don't have rivers, you have dry creeks and all the wildlife in them dies.

The big one is water rights. The water is not the states to impound in the first place in many cases. If I have particular water rights, and you block them, I can sue you out of existence under existing laws, laws that are going to be very hard to break with our current legal system.

> One is you want to keep the rivers flowing in the first place. If you impound too much water, you don't have rivers, you have dry creeks and all the wildlife in them dies.

That's only if we build massive dammed reservoirs that try to serve dense populations from a single source like Hetch Hetchy supplying the Bay Area. A system of smaller reservoirs dotted across the state would serve the same function without the concentrated ecological impact. San Francisco has three terminal reservoirs within its city limits, for example.

> The big one is water rights. The water is not the states to impound in the first place in many cases. If I have particular water rights, and you block them, I can sue you out of existence under existing laws, laws that are going to be very hard to break with our current legal system.

That's why utilizing the whole water cycle is important, rather than concentrated sources like rivers and streams. A farmer can prove you're taking his inch of water by comparing upstream of the installation but it's much harder to do that if snowmelt is being collected in hundreds of smaller reservoirs along the mountains. (IANAL, so grain of salt and all that)

There are already 1500 reservoirs in California. It's a myth that there are un-impounded streams waiting to be captured. There really are not. Just look at the area around Placerville. There is Sugar Pine, Loon, Big, French Meadows, Ice House, Hell Hole, Stumpy Meadows, Union Valley, Sly Park, and, of course, Folsom Lake. That's all in a diameter of only 30 miles.
Generally that snowmelt either goes into existing streams or penetrates into groundwater though. It's not workable to just capture every drop of snow even if we could from and engineering and water rights standpoint, that water is already feeding environments that would dry out and pose more fire risk without that water.
It only seems simple if you're the kind of imbecile they put on the staff at the National Review. California has several reservoirs that aren't fed by gravity runoff, but by pumping ("off stream" reservoirs). All of the newly proposed reservoirs are of this type, such as the Sites Reservoir. To fill these you need excess water elsewhere. We don't have excess water elsewhere, thus we could not fill them. This isn't a simple matter of time-shifting water from one year to the next because as the OP is pointing out this is a long-term phenomenon that is permanently decreasing our steady-state precipitation.
I'm guessing that your comment is being downvoted simply for the first sentence. The rest of your comment is factual.
> Our reservoirs are empty. Why would another reservoir help up?

I’m not an expert, but presumably the reservoirs are empty because too many people were drawing on them (too much load per unit capacity). Increasing the reservoirs spreads the load across greater capacity.

But in general California (and much of the rest of the country) needs to stop it’s unsustainable agriculture practices.

The problem is that California is the breadbasket for a ton of US goods. You're right, we need to stop but it's gonna be painful for a lot of industries.
What are the major agricultural commodities for which California is the breadbasket, and how many of those commodities could be sustainably grown elsewhere in the US and/or imported from abroad? Besides maybe almonds (which can presumably be easily imported), nothing springs to mind as predominately californian.
California totally dominates the fruit market. Georgia might call itself the Peach State but California produces 20 times more peaches. California produces 90% of the nation's grapes and twenty times more wine than the second-place state. It's not necessarily that you couldn't grow these elsewhere, but it is a path-dependent process by which government subsidies have pushed all this production to California and killed the industries elsewhere. Changing this so fruits and vegetables are widely produced in every state would involve an abrupt discontinuity that entrenched California growers are sure to oppose.
As long as the other states’ diet can be 100% corn based, they’ll be fine.
Interesting. This seems believable. Supply chains don’t turn on a dime and unsustainable farmers will always support the unsustainable practices on which they depend, but we should start making moves in the right direction now.

> Changing this so fruits and vegetables are widely produced in every state

This isn’t the requirement. The requirement is that we source sustainably grown food. That can come from Mexico or the lusher regions of the US or wherever. I don’t think we need to grow oranges and lemons in Alaska or corn in Hawaii, we just need to be able to get sustainably-grown food to those places.

Explained it better than I could!
Your point could be valid. A quick googling of water demand in CA produces the following. Urban water use is only 10% of total water use in California. Agriculture uses anywhere from 30% (wet year) to 70% (dry year). Just raising cattle in the state uses anywhere from 100-250 million gallons per day.
How much does almonds and rice do? And could you grow plants on the cow land?
Makes you wonder wtf is going on there (Almonds/Rice)? Just as insane as irrigating Alfalfa fields to harvest hay for cattle to eat.
> They're really just stupid out here.

I don't think this is a fair statement and rather it seems like you want just to put a label on the whole state to avoid having to research into why didn't California build more reservoirs; frankly, to me it makes you look like a troll.

On the one hand, it's the same reason we stopped building freeways: federal funding dried up - they own almost all the dams because they own almost all the land. On the other hand, as a Californian, I couldn't agree more with the GP.
Watch out, agreeing with a human experience will get you banned on this fascist forum
Cheap electricity to power desalination plants could be a solution.
I will never take any complaint about residential water use in California seriously while there are flooded rice paddies in Sacramento: https://localwiki.org/davis/Rice_Paddies
Yes. Last time I checked, water used for rice growing amounted to 8% of all water use in California, and all household / urban use was also 8%. It is madness to grow rice in a desert, but that is California water "management".
Nobody grows rice in a desert. The rice-growing areas of California are naturally inundated. We spent billions of dollars un-flooding Glenn, Butte, and Tehama counties. Rice fields are flooded in the winter when they would have been flooded anyway, then drained in the early spring, then flooded again during peak runoff season in the late spring. They don't "use" water in a way that could be reduced to help anyone else.
Non-agricultural use makes up about 16%, IIRC, but not sure how "household/urban" use fits in there.
wow i haven't seen a davis wiki article in ages! really brings me back. probably about to not get any sleep reading through that site now
> Not only does the state not prepare, but thanks to the record-setting wildfires of the past decade, the amount of carbon and soot pumped into the air has probably offset any gains that had been made. They're really just stupid out here.

This is a little unreasonable and just smacks of victim blaming. The way you write suggests the California has been deliberately setting their own wildfires, rather than just being a early victim of climate change.

With regards to water reservoirs, that does not seem to be a uniquely Californian thing. As an outside observer it seems the entire US is dependent on ageing infrastructure built after WWII, which has seen nothing but neglect since.

California also reduced or stopped forest management in the 80s, it's a bit deserved.
Lifelong Californian here. We're not victims - that would imply some outside actor. In reality it's almost entirely our fault.

The water shortages are not caused by climate change. They're entirely caused by our water policy. Specifically: Expanded crops in the central valley (which we should simply not grow) and failure to expand infrastructure to keep pace with development as noted above.

Climate change is a factor, but the fires are primarily caused by substantial mismanagement throughout our utilities and government.

> Lifelong Californian here. We're not victims - that would imply some outside actor. In reality it's almost entirely our fault.

You're responding to a post about wildfires. Your post doesn't make sense in context.

p.s. I was born, worked and lived in California for 40 years.

No, I'm responding to a post and comment about the water shortage which mentions wildfires in passing.

You've been here almost as long as I have!

> No, I'm responding to a post and comment about the water shortage which mentions wildfires in passing.

Original: > This is a little unreasonable and just smacks of victim blaming. The way you write suggests the California has been deliberately setting their own wildfires, rather than just being a early victim of climate change.

> We're not victims - that would imply some outside actor. In reality it's almost entirely our fault

Your interpretation of the chain of the conversation is incorrect. The victim-blaming is in reference to wildfires, which you re-frame as being about water (because that's what you want to focus on). Good luck with whatever.

Sorry, I'm not really interested in whatever this is you're doing here. I was in fact responding to the drought bits.

Have a good one.

As the author of the original comment, let me clear this up.

> This is a little unreasonable and just smacks of victim blaming. The way you write suggests the California has been deliberately setting their own wildfires, rather than just being a early victim of climate change.

This part of my comment was about wildfire and climate change only. I didn’t intend, nor do I think I did, suggest any link between droughts and climate change.

> With regards to water reservoirs, that does not seem to be a uniquely Californian thing. As an outside observer it seems the entire US is dependent on ageing infrastructure built after WWII, which has seen nothing but neglect since.

This is a second, separate part of my comment. Hence the new paragraph. Here I was commenting on the state of US infrastructure and how it relates to California’s water reservoirs. Again I didn’t intend to link water shortages to climate change.

So, in summary, my comment has distinct parts. In neither part do I bring up any link between water and climate change. I do, however, quite explicitly link climate change to wildfires. I’m quite happy for people to assert that such a link doesn’t exist, or isn’t substantial.

In short my comment was about wildfires and US infrastructure, that doesn’t to droughts at all. You’ll notice that my original comment doesn’t contain the word “drought”.

This isn't a very complete picture of what's going on with water in California.

Even as population has almost doubled, and as agricultural output increases, we have decreased our water usage:

https://www.ppic.org/publication/water-use-in-california/

There's a lot to be said for simply not wasting lots of water.

If California stopped growing alfalfa, a low value product that is the largest agricultural use of water, we could probably house 20-30M more people with that water.

California could have built more reservoirs, but how many more? And how many more natural beauties would we have sacrificed instead of simply using less of a resource?

The stupidest thing California does is treat water rights as economic land for farmers that simply waste obscene amounts of a valuable resource. We need to tax that economic land at the full land rents, to encourage more economically efficient uses.

It sounds like there really isn't anything to be concerned about then.

"If California stopped growing alfalfa...we could probably house 20-30M more people". I'm very happy to stop growing crops in the desert, and agree there's absurd waste there (just because something can be done does not mean it should be done). But 10s of millions more people...is that really a goal, or even a good thing?

People have to live somewhere, and if they live in California they are going to be living a lower carbon life than if they live in Texas, Boise, Phoenix or Atlanta. Those are the places that California has been exporting anybody who doesn't make lots of money. So yes, as a California resident,, I think 20-30M more in California is a fantastic idea compared to the alternatives.
Just a small point about Texas: Although it still pumps huge amounts of oil and gas, it also has more wind power resources that it could deploy. Texas could have a lower carbon future if it so chose.
Though electrical consumption is far lower in California than Texas (and bills are typically lower deposits higher $/kWh), the electrical change isn't the biggest factor.

The grid can always be greened fairly quickly. That's an easy change to make, and happening quickly in places like Texas where legacy expensive fossil fuel generators aren't protected by utilities. Now that renewables and storage are cheap, any new natural gas plant will soon be a stranded asset, and generators on ERCOT are quickly realizing that.

A much harder change is transportation. We can't build enough electric cars fast enough for the transition, and land use patterns in Texas typically require cars even more intensively than California. In contrast, biking to work in the Bay Area is pleasant newer year round, and there's not much mass transit but at least a little.

The Texas lifestyle requires a car, and people that are forced out of California typically leave in the blue low-carbon areas on this Tablueau map, but will likely move to the red high-carbon areas.

https://coolclimate.berkeley.edu/maps

At least, that's the anecdata I have from people I know, but it's not proper data.

Not saying it is right or wrong, but traditionally we would use a market to decide that, where the new people can buy the land / water at a higher price if it is worth more to them than the alfalfa farmer. This adapts the goals of people based on their economic activity. But water right are a complicated chain and mostly not treated like a market in California.
> The stupidest thing California does is treat water rights as economic land for farmers that simply waste obscene amounts of a valuable resource. We need to tax that economic land at the full land rents, to encourage more economically efficient uses.

Sort of. There's no useful secondary market for appropriative water rights in California. A farmer with a senior water right can't sell that right in a dry year without risk of losing it the next year, which is why you end up with a misaligned incentive that produces silly results like growing rice during a drought.

They need to use all their water, regardless of how dry it is, or they risk losing it the next year.

You might look at the politics around building a desalination plant near Monterey. A lot of people are against building the plant because they think we can avoid it through water conservation and a water reclamation project.

Although I haven’t studied it enough to say for sure, this seems short-sighted to me. In particular, the water restrictions prevent building more housing, and existing water sources seem vulnerable.

I don't live very far away from there, and what I've learned about local politics is that: 1) it's very dirty, you encounter the worst sort of lying and meanness from people that are otherwise normal, and 2) almost nobody publicly states what they want or why they want it, and everything is argued on what will be the most effective vicious political attack rather than heartfelt beliefs.

With desalination, much of the underlying opposition is from older folks from the 70s who are worried about "population" in particular less wealthy and non-white people. Environmentalism of that sort is about a person living in a suburban home with greenery around them more than reducing overall pollution or environmental impact. There is a toooooooon of extreme wealth in the Monterey area right next to the most extreme poverty, which is really at the heart of a lot of the opposition to desalination.

Then there are people who earnestly are worried about environmental damage from water intakes and brine dumps, but I think those concerns lie with fewer people, and not with those who wield the most political power in the area.

There are some great points being made here and Im really glad to see the generational issue come up. Wondering what role people think California boomers are playing in these problems as a distinct subset from Californias population as it will exist in ~30 years when they're gone?
> opposition is from older folks from the 70s who are worried about "population"

Absolutely yes and thanks for calling it out. Water is weaponized all over coastal California. "There's not enough water here" is a very convincing argument to stop construction on new housing. Santa Cruz does the same thing as Monterrey as does Malibu.

The results are often horrible infrastructure with septic tanks leeching into creeks etc. but housing remains scarse which is a win for entrenched property owners

> "There's not enough water here" is a very convincing argument to stop construction on new housing. Santa Cruz does the same thing as Monterrey as does Malibu.

I don't know details of the others, but in Santa Cruz water sources are limited to rivers and one small reservoir (Loch Lomond) which is getting low. Concerns about water availability are very real. Without rain all of these could dry up.

https://www.cityofsantacruz.com/government/city-departments/...

But the idea that new housing is connected to increased water usage does not, as they say, hold water.

https://santacruzlocal.org/2021/02/15/does-more-housing-mean...

As Santa Cruz's population has increased, water usage goes down. Replacing old inefficient single family homes with terrible appliances and plumbing, with 4x as many people in a multifamily building with highefficiency appliances and faucets, and modern landscaping, will likely reduce water consumption.

Alfalfa is a legume that improves soil [1]. Therefore, it cannot simply be dropped; it would have to be replaced by something.

1: https://en.wikipedia.org/wiki/Alfalfa#Ecology

Most legumes add nitrogen from air to the soil. The effect can be easily replaced adding industrial urea. On the other hand, many native plants (those that will survive) dislike having too much nitrogen in soil.
> Not a single new reservoir has been built since 1979

Just one example of the bigger trend/policy:

California is extremely averse to build anything.

FIguring out why that is is the interesting part.

With water sequestration specifically, we've already built all the cheap dams. It's significantly diminishing returns at this point.
I’m all for building new reservoirs but you’re incredibly wrong.

It’s weird hearing this because I live 500 feet away from a new reservoir built in the 2000s.

Literally. I take walks out there, stare at the man-made lake, walk pass by the museum where all the archaeological discoveries were made.

I don’t know what kind of subpar journalism goes on at the National Review but they couldn’t be more wrong.

https://en.m.wikipedia.org/wiki/Diamond_Valley_Lake

The National Review is more focused on developing political ideas than it is on journalism, kind of like Jacobin is on the left. In particular, coming up with new ways to hate California seems to be a popular pastime on the right, since California turned towards the left after the 90s.
> a new reservoir built in the 2000s

Wikipedia says, planning started in 1987 and construction was from 1995 to 1999.

Would more reservoirs help? Excess retention is useless if the water isn't coming in.
We had flood warnings a few years ago in the central valley. California has always been boom or bust for water.
> Not a single new reservoir has been built since 1979

This is not an accurate simplification of "did not construct one additional, large-scale water storage project." The have been a number of new reservoirs constructed since 1979. e.g. https://en.wikipedia.org/wiki/Diamond_Valley_Lake

There are also sort of a lot that have been proposed, but have not been funded, due in part to the 1986 federal law that banned federal funding for water projects unless most of the funding came from other sources.

The emphasis on population growth IMO suggests that the water consumption has just increased linearly with it, which is not true:

> Total urban water use has been falling even as the population grows.

Also urban water use is a fairly minor part, and it looks like agricultural water use is actually also down in the last few decades too:

> Farm production generated 38% more gross state product in 2015 than in 1980, even though farm water use was about 14% lower

https://cwc.ca.gov/-/media/CWC-Website/Files/Documents/2019/...

These sorts of claims that suggest California needs to increase its water supply by 50% should be argued using water usage data, not using population numbers.

p.s. if all the reservoirs proposed were magically built this year, I think the total new water supply would be insignificant compared to the existing huge reservoirs in prime locations.

>They're really just stupid out here.

Oh, they are not stupid. I can bet the ruling class in California has their own generators and does not have to drain their swimming pools due to water shortage. In fact, they are very successful at manipulating the general public at turning a blind eye at them and even not wanting all these things. Why build infrastructure for the plebs if you can pick a few activist groups, give them the power to bully the fellow plebs over zero-cost topics, and keep the society busy? This is very smart. USSR has failed at it, so did many other dictatorships. The U.S. situation appears pretty stable. People seem to genuinely believe that shaming your neighbor for having kids and demanding that schools drop math exams will solve all the problems.

Ironically, U.S. used to do use the divide-and-conquer approach overseas some decades ago. They would support multiple competing guerilla groups to keep them in a permanent state of fight, and prevent the territory from becoming strong enough to be a threat. Now the same tactic is aimed at your own middle class and nobody seems to care...

Rich people aren’t a monolith and some of them live in rural communities with severe water shortages. There are stories about people having water trucked in, which has to be very expensive.

But the politics is basically that people don’t want to pay for expensive new infrastructure and see their utility rates go up. This isn’t just water - you see the same thing for replacing outdated sewer treatment plants. I don’t think it’s the rich who are worried about their utility bills?

The bills go up anyway, in order to maintain the permanently growing army of bureaucrats. The only realistic way to solve it is to bring back competition. If you have multiple competing small operators, and one of them offers better infrastructure at a reasonable extra cost, people will switch. If you let them all get merged and managed centrally, of course all you get is a carefully written apology letter blaming climate change.
I don’t think this is realistic for water. Economy of scale matters. Small-scale operators have higher costs and are more vulnerable.

At the small scale in the West, water comes from pumps that can go dry as the water table drops, or from streams that can dry up in a drought.

Are there any suitable valleys left that haven’t already been dammed, aside from Yosemite?
Totally agree on the giant circle jerk that is California conservation politics (which IMO are all show and hot air, no realistic action - except when it comes to stopping any sort of actual necessary stewardship work like fuel reduction or development of higher density).

That said, the reason new dams haven’t been built is simple - all the areas worth damming already have been. There are only so many areas with enough dammable area and enough precipitation to make it even a little worthwhile, and those were all obvious by the 40’s and dammed up by the 70’s-80’s at the latest.

It isn’t even about how close something is - hetch-hetchy slaked the thirst of most of the Bay Area, and that is a solid 5+ hr drive away.

California's population would be shrinking (due to inter-state emigration), if not for international immigration: https://www.ppic.org/wp-content/uploads/californias-stalled-...

Securing the southern border and deporting all irregular migrants should also be a priority from an environmental standpoint.

How is bringing up immigration policy in a conversation about climate change(which does not respect national borders) anything but a non sequitur?
Wildfires don't really play into climate change much, carbon gets released, the plants grow back. In the same way, planting trees doesn't help climate change much, its just a temporary buffer.

Also it is easy to say "build water projects", but to actually do it is not so simple. Build what exactly, where, and what other consequences will result? The world is crowded enough that people's usual "simple" solutions almost always cause other problems, or are vastly too small in scale to help anything at all (plant trees! don't use paper straws!)

Anyone worrying about what you can regarding climate change, it's nice to stop driving etc but the big issue is fossil fuel consumption. That's in the hands of big money. How that changes is another story but they've been clever to put the blame on domestic, urban consumers when we're a tiny minority of the polluters. Knowing that should help those keen to help out know better where to look.

In the meantime, no or little meat and flying is the best you can do.

Driving uses fossil fuels, unless you're in an electric car - and even then, depending on electricity mix.
Is "big money" doing it for no particular reason though? My impression is that it's mostly large enterprises that, at the end of the day, serve consumers, so consumers are ultimately deciding, and so far, very few of them care enough.

Even among those who are very vocal about climate change and ask for regulation, to many, overseas vacations are more important.

Source? At least in the US, cars make up a decent share of our carbon emissions, around 16%. Other greenhouse gases like NOx or Fluorinated gases are mostly produced by industry though.

https://www.epa.gov/greenvehicles/fast-facts-transportation-...

Collectively, consumer behavior makes a big difference, as we saw when oil prices dropped very low during the pandemic and are shooting up now.

But it’s true that what an individual does makes little difference, unless you figure out how to make it scale.

I’ve seen this posted a lot and I read it as an excuse to throw our hands up and do nothing individually. However culture matters and as we shift our behaviors as individuals, pressure builds on corporate behavior as well. Both through local politics and internal politics within the company. We do need drastic regulatory changes, but we also need as a society to put our weight into it.
> it's nice to stop driving etc but the big issue is fossil fuel consumption. That's in the hands of big money.

Driving is the biggest source of fossil fuel consumption. Where are you getting your talking points?

Think about the last time you filled up your gas tank. Let's say it's 20 gallons of gas. That's an absolutely massive massive amount of fossil fuel, if you think in terms of 5-gallon buckets.

Each gallon of gas emits 20 pounds of CO2 when burned (it gets heavier because each carbon atom gets two oxygen atoms are arched to it). That's 400 pounds of CO2.

Now let's compare that to meat. A pound of beef, something that lasts 2-10 meals, averages 20 pounds according to the all-in estimates that I've seen. (Note that the 400 pounds of CO2 from a tank of gas underestimates true emissions because it skips the 10%-50% extra energy for extraction transport and refinement, that gets cou United against beef).

Other meats, from non-ruminants that don't emit methane from digestion, have a fraction of the carbon footprint.

Run the numbers on flight, and it's about the same emissions as a single passenger gas vehicle driving that distance.

Run the numbers on your fossil gas furnace fossil gas water heater, and it's about as much as a typical car.

All the stuff you buy that's not directly fossil fuels? Tiny fraction of this all.

Climate change will not be solved by individual action. It will be solved by collective action to change everybody's behavior. Everybody. The biggest impediment to that change is politics, and the biggest impediment to political change are the forces mobilized by big money interests. But what you are repeating here plays right into their hands, not into the changes we must make to all of society.

First: the bigger point is that it will be systemic and collective actions which result in meaningful change. Individual mindfulness and advocacy help, but they're by no means sufficient.

On fossil-fuel consumption and carbon emissions:

Natural gas and coal combined exceed total petroleum usage (measured in quadrillion BTUs) for the United States. Much of the coal and gas is used in electrical generation, though also in industrial and commercial use.

https://flowcharts.llnl.gov/content/assets/images/energy/us/...

It looks as if transportation net carbon emissions are slightly less than 50%:

https://flowcharts.llnl.gov/content/assets/images/charts/Car...

It's close enough that this is something of a niggle, but in terms of accuracy, whilst it's fair to say that transport is a major source of CO2 emissions, it's not quite the majority contributor.

I said biggest, not majority. But there are also other reasons to focus on transportation over other sectors. The US is an outlier from other developed countries in their high CO2 emissions per person because of their transportation choices. And these choices are hard-baked into the design of our land use, and will be the hardest to change.

Despite the existence of a tiny fraction of electrical vehicles, we are nowhere near on track to decarbonizing in time. In order to naturally shift over to EVs in time, with the natural aging out of gas vehicles, we would have had to be at 100% EV for new vehicles in 2020. We won't be to 100% new EVs any time soon at all.

In contrast, other sectors are really easy to decarbonize. Electricity generation will decarbonize faster than current predictions, because everybody uses old data in their models, and even two year old renewable data is hopelessly out of date.

Heating by heat pumps rather than natural gas is also fairly easy to transition through building codes. Simply requiring all new outdoor AC units to include the $200 switch to also heat would result in a fairly speedy transition for the second largest residential use.

So with the conundrum of transport, the only real solution we have is for people to drive less, while also transitioning to EVs as soon as possible. However we have planned nearly all of the US for car-dependency, and there are very few places to live in the US that don't require a car. Very few. This land use change, to allow car-free living, is a bigger battle than switching away from meat, and far harder to convince people to do. There are so many more vegetarians and vegans than people that acknowledge we should allow less driving, and it's a switch that takes far longer to make.

Further, this switch to less driving is under local control, controlled by local planning committees and local transit committees, not mysterious billionaires living in mansions. It's under supposedly-democratic control, it's just that the people showing up to these meetings are not people who care about climate change, or at least they don't realize the connection between land use and climate change.

Vehicle fleet transitions do take time, though if there's a committment to all-electric (and some countries are getting there, none have currently-operative mandates, there's still roughly a 7-year lag for 50% conversion given vehicle life, absent some trade-in scheme.

Another alternative is to promote private-vehicle alternatives: transit, bikes, walkable neighbourhoods, etc. That might occur more quickly, at least within some regions.

Residential retrofits are similarly slow. New-construction mandates effect only a thin margin of housing, and in regions where new housing construct vastly lags demand (coff-California-coff), that would be centuries. There's now talk of retrofits, though easy replacements (stoves/cooking) neglect hard ones (water and space heat, clothes dryers). Again, replacment cycles for those are on the order of 10--20 years, and require considerable grid upgrades.

Your point about the US (and much the rest of the world) being designed for car-dependence is precisely what I'm talking about by "collective action". The private automobile singlehandedly created the dominant land-use patterns of the 20th century, and reversing reliance on the automobile will require utterly transforming land use, again. And that is a collective problem, not an individual one. The most gold/platinum/green LEED ratings for a building do nothing if it induces 40,000 miles of daily private vehicle commute demand. Convert that to walkable, bikable, and LRV transit, and you're avoiding 800 gallons of fuel consumption a day, 160,000 gallons/year.

And that doesn't happen simply through individual mandates.

The influence of "billionaires living in mansions" on housing is stronger than you give credence, as real estate forms a principle asset class for the financial sector, and hence, asset inflation serves multiple interests. This isn't the only factor behind promoting auto-dependent sprawl, but it's an extraordinarily powerful one.

>Climate change will not be solved by individual action

Thanks for clarifying - my post was badly written and it was what I meant to convey. Small individual action is really meaningless compared to the massive polluting done by industry - collective global action is the only thing that will change this. On the scale of saying, obtaining voting rights for everyone outside of white men or men who owned property (the norm until the late 1800s).

Also, I'm in an area right now with few cars so I probably just forgot about them.. definitely, don't drive too much either. Or carpool. Trains are better: According to the European Environment Agency, rail travel accounts for 14 grams of CO2 emissions per passenger mile, which is dwarfed by the 285 grams generated by air travel, and the 158 grams per passenger miles from journeys in cars.

What if every manufactured good had a nutritional label that told how much energy, oil and minerals were spent on it?
I wonder how long it'll take before California starts to see a decrease in population due to scarcity of water.
10% of water in California is used for urban needs, it’s more likely agriculture will get hit by water shortages first than population growth. But then again, the permitting process is already limited to an extent by available water resources, it’s part of the infrastructure needed to build.
Agriculture often has the more senior water rights, so I wouldn’t be too sure.
Either way they can’t wring any more water from urban users. Rural users will get hit 90% faster than urban users as water becomes more scarce simply because they consume more now.
No- if water becomes more scarce, those with junior water rights don’t get water. The end. Those with senior rights get just as much as always. So the question is not whether you are ag or rural or muni, it’s how senior are the rights you hold?
The state will simply invest more to bore water down from Northern California. But that won't be enough to satisfy agricultural needs, and farmers will have no access to the water that is brought down. Heck, for urban users, even desalinization is economical, but not for agricultural users.
Re-routing water from far-away farms to metropolises will take time, so it's DEFINITELY possible that we'll see water shortages in major cities.
And how long since we consider that an ever growing population is not a good thing for the environment?

When I read medias like Bloomberg, they seem legitime in their climate change coverage, but they always lament the slow growth of US's population.

That's likely coming from different reporters talking about things from different angles. A shrinking population is a potentially big economic issue it puts stress on all sorts of things chiefly the Social Security system in the US (and those like it in other countries).

Ultimately I don't think we'll be able to population shrink our way out of climate change, at least not on timescales and in ways that people are willing to accept. It's just coming too fast and the population changes so slight that it's not going to come in as a last minute solution.

One of the things that has puzzled me for a long time is how little thought we have applied over time towards designing and building better homes. Energy and water usage are two elements of this.

Regarding water. Every time I wash my hands I wish that water went into a gray water tank instead of being wasted. This water, perhaps with some filtration (or maybe not [0]) could then be used for irrigation. The same is the case for the shower.

We try to take walks around the neighborhood every day. I am always amazed at the amount of water almost constantly running into storm drains due to overflowing/unmanaged lawn watering. If we designed homes to store water secondary use we would likely save enough water to make a huge difference. Washing the car or hosing-down the patio or driveway would also benefit from this immensely.

This water would most definitely be good for flushing the toilet. Why do we need clean drinking water (that's what's coming into your house) to flush the toilet? !!!

In other words, just about the only use for "first generation" water at the home would be drinking or cooking.

Why can't I dump the water I used to cook spaghetti into a sink that routes it into a holding tank? Why can't that water be used to flush the toilet?

All of this would require a design rethink and creating the incentives necessary to compel people to retrofit. New construction, by default, would come with these enhancements.

To go beyond this, imagine the water wasted by large buildings. A 5, 10, 20+ floor building a hotel perhaps or an apartment building with 300 units. The numbers are staggering.

As a general comment, everything in government or public infrastructure always seems to be about "more" rather than "more efficient" first. More lanes on the highway, rather than coming up with ways to make traffic more efficient (like punishing the guy doing 45 in the middle of a sea of cars who have to go around him, creating a traffic jam that ripples back for miles). Efficiency never seems to be discussed or even considered. Saving is never a parameter in the public discourse.

And so, neighborhoods like mine, built 20-some years ago, have, every day, perfectly good water flowing like rivers down the edge of the street to eventually find a storm drain.

Energy is another one. Dark roofs. Unbelievable. A few blocks away someone pained their house black! Wow. Air conditioning systems that do not have the ability or option to bring in cool filtered outside air in the evening in order to cool down the house "for free" (compared to running a 5 ton compressor, a fan would be free). Interesting that cars have had the option to recirculate inside air or suck-in outside air for as long as I can remember but we don't require this from homes by law. Or how about systems that cool down or warm-up walls as required in order to store energy rather than just circulate cold air, which has horrible thermal capacity?

Etc.

[0] A friend mentioned that hand and dish soap in low concentrations doesn't really harm lawns, trees or plants. I did not research this. If this isn't the case, I'm sure some form of simple filtration could resolve the matter.

Storm drains do need some flow to keep them clear.

Grey water systems seem most viable at the water district level, e.g. water treatment plant recycles clean water from drains back into the fresh supply. This is what some cities in Nevada are doing.

A grey water system in your house would be a duplicate set of plumbing, and you’d have a hard time keeping it clean & unclogged in the long run. The scale is small so the cost efficiency would be poor compared to district level.

I don't think what I am proposing would prevent water from hitting the storm drains. For example, my neighbors, the ones blasting water onto their laws, they would use recycled water instead of clean drinking water.

This problem is complicated because homes are not designed with extra space for what in commercial buildings is called "mechanicals". A room or more where building systems are housed and maintained.

If I were to ever build my own home I would likely design a room, about the size of a two car garage, to house such systems. Anything from water recycling to batteries, heating, cooling, network, etc. I would probably make it an extension of the traditional two car garage just so that it is conveniently located with access to both tools and easy entry/exit of large items when you have to repair or replace something. Pretty much every home in my neighborhood could easily have this. They simply were not thinking this way.

There are buildings built like this. In Europe. It is more expensive to add these specs.
> One of the things that has puzzled me for a long time is how little thought we have applied over time towards designing and building better homes.

We have thought a lot, but the reality is that the market, which we rely on to drive how things like houses are built, has shown that regardless of what they say, people ultimately value a 5th bathroom more than they value energy or water efficiency.

The only way to ensure broad efficiency is by raising building codes - which has happened a bit - but raising them to a level that actually can help mitigate climate change faces stiff resistance from the mass production building industry, whose business model is based on building disposable, inefficient housing, and the homebuyers who want both cheap and large homes.

Jeez, where do you live that people have five bathrooms?
And we use all of them...
I would think bathroom use would be the same whether you have one or five bathrooms.
The "high end" production built suburbs of most American cities built in the last few decades. The country has moved far from little Craftsman or Sears homes.

I don't live in such a place but have spent plenty of time visiting them.

Your intentions are good. But if urban use of water is indeed only a fraction (others say 10%) of farming use then we should should first focus on improving the efficiency of water use in farming and/or reducing the need for farming altogether.
There is no "first". City dwellers can do city things, and rural folk can focus on their practices.

This habit of "othering" the problem is how we got here.

> In other words, just about the only use for "first generation" water at the home would be drinking or cooking.

> Why can't that water be used to flush the toilet?

Re-using "grey water"[1] as the source for "black water" is a big theme in permaculture,[2] which originated in Australia, a famously dry continent.

You absolutely can do that, regulations permitting. There are a few gotchas though, so do your research.

1. https://en.wikipedia.org/wiki/Grey_water

2. https://en.wikipedia.org/wiki/Permaculture

Real quick thing about the water in California: it's important because it is used to make food, which is exported from the state's central plains to the rest of the country. Your mental model should not include the direct water use of humans.. this is and always has been about the economics of food production.

So if people leave California, it will be because they can't get jobs in agriculture.. people would be coming from Fresno, not San Francisco. Also the increase in food prices brought about by the collapse of that titanic industry will be borne by everybody in the country, and is therefore the problem of everybody in North America who likes pistachios and such.

it's not just pistachios and almonds, it's a full 1/3 of the country's vegetables and 2/3 of the country's fruits and nuts. California's water problems are everyone's water problems.
In the most extreme scenario, can the US create new agricultural fields in other states, cutting down forests if needed ? The weather will change but surely the US will still have arable land enough to feed its citizens (even if they have to forget some kind of crops (pistachio, etc.) aside) ?
Yup. Or even just build a canal from the Pacific Northwest - which gets so much water they can’t use almost any of it, even damming everything they can - down south.

California has always gone through droughts, and the issue isn’t an actual lack of water (from a support of the population, or even support of agriculture in general). It’s the economics of it, what is cost effective where, and prioritization of what makes sense and what doesn’t- which is hard, and there are a lot of incumbents with iffy models (cities, counties, and farmers) that don’t want to adjust or be honest about any of this.

You can't use words like "always" - large-scale habitation of California isn't even a century old.
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Going through a drought doesn’t require habitation? And if a drought exists or not says nothing about demand on the water that arrives, just how much water arrives.

Tree ring records in north America go back approx 12k years. Here is a study analyzing back to 101 b.c. In California specifically [https://link.springer.com/article/10.1007/BF00193528]

The Spanish also started to colonize California (and keep records) in 1770ish, well before the prior wet spell started in 1850 (and ended in the 60’s ish)

As climate bands move, which areas become suitable change as well. I don't think it's obvious yet exactly where, if anywhere, makes sense since the place you move it to might be untenable ten years later at this rate.

Of course such moves would heavily entrench large agricultural companies who have the resources to build speculative farms.

I'm personally expecting that farmers will adapt to local conditions and grow crops that use less water and don't mind the heat, or else find a way to reduce water losses from evaporation.

If fruits and vegetables that are no longer tenable to grow in California become more expensive, and they probably will, there will be more incentive to both find a way to grow them more carefully in California as well as more reward to exploring growing them elsewhere.

Well, th skies have looked progressively more like Bladerunner 2049 up here in Alberta for 4 summers running. We had some crops fail due to heat earlier in the season, and more are failing due to dryness now. So don't look at us.
I think too many people have a mental model that we can just shift a little north and it will all be ok, but that’s too simple a model. The temperature extremes from regular seasons are likely going to widen, making crop yields drop in a much wider band than just where the average temperatures rise and precipitation drops to drought levels.
Sure, but nothing will fully replace the productivity of the California central valley, which has some of the most fertile soil in the world. The Willamette valley up in Oregon is incredibly fertile as well, though it is currently too cold to grow lettuce and strawberries year round. That will change in the coming years but the Willamette valley is about the third the size. Additionally, the Pacific northwest is drought prone just like California, it's just not quite as bad yet. When I was there earlier this summer the reservoirs we're quite low
They're even lower now. A few months ago, the federal gov't cut off a lot of farmers in S. Oregon from water that they use for crops. To save fish.

> Amid historic, climate change-driven drought, the federal government in May shut down the water supply from the Upper Klamath Basin on the California-Oregon border to protect native fish species on the verge of extinction. As a result, Hill and other farmers like her in the region have been cut off from water they have used for decades.

https://www.cnn.com/2021/06/10/us/klamath-oregon-drought-wat...

People go to bed with water and wake up to dry wells. Since the farmers can't use the traditional water source in the area, they are digging their wells deeper and deeper in order to water their crops. Something a lot of regular people can't afford to do, so as the farmers drop the water table searching and searching for that continually drying up water, others are going without.

https://www.opb.org/article/2021/07/29/southern-oregon-wells...

Bad things seem to be coming.

I wonder if there are any water loss effiencies that can be applied to crops. Farmers of certain crops in California basically erect and take down temporary structures of all sorts either for pest or temperature controls to optimize yields already.
>currently too cold to grow lettuce and strawberries year round.

I don't have links, as I found out about by asking what happened in the San Yanez and Santa Maria valleys to someone who works in Ag finance (they are starkly barren compared to what they were just a few years ago and I was very curious), but California berry production has been almost completely off-shored to Argentina. As they explained, berries are a low margin crop to begin with that absolutely requires hand picking, and California's minimum wage laws along with cheaper refrigerate freight have driven the local farmers out of business. He seemed to think that California Ag was completely on its way out, and that we can expect to be importing almost all of our fresh vegetables and fruits from South America.

the largest contiguous section of class A farmland in the world
> can the US create new agricultural fields in other states

Even California could. California could have much more irrigated agricultural land, if they completed Stage II of the original 1957 California Water Plan.

I guess before 1970s, there was not much political controversy in building reservoirs and harnessing rivers and directing the water flow though agriculture. Then in the 1970s and after, some people started to see intrinsic value in rivers in their natural state, and opposing further water projects.

https://en.wikipedia.org/wiki/California_State_Water_Project...

https://en.wikipedia.org/wiki/California_State_Water_Project...

Table crops require ample irrigation and mild temperatures.

The parts of the US which have the most rain also tend to see more severe winters. The parts of the US which have more sunshine and warmth ... tend to be dry.

It's possible that table-crop cultivation --- lettuce, fruits, vegetables, etc., could move to the southeastern US. That's closer to larger population centres as well, which might reduce shipping times and costs, and improve produce quality in Eastern and Central grocery stores. Traditionally, the South is known for cotton, peanuts, stone fruits (peaches), oranges (Florida), and tobacco.

The magic California offered was hot, dry, sunny summers, with the only thing required to make the fields bountiful being a reliable supply of water. The state's mountain dams fed a slowly-released pulse of meltwater from snowpacks delivered this.

There is the added bonus that although the Central Valley is famously hot, it has low humidity, making farm-labour conditions far more tenable, helps as well. Mississippi in August is not a dry heat.

That's now severely imperiled.

If things get that bad, building a nuclear power plant and devoting its power to desalination would probably be more economical and environmentally friendly than cutting down forest for feilds.

Hell if it gets that bad building a pipeline to pump water south from the mouth of the Columbia river would be on the table.

How will you cool the reactor without water?
Remember the whole "power devoted to desalination" thing? all you need is the starting freshwater and then it can process its own from sea water.
Big ask considering the state of water availability currently.
It would require forethought because it takes time to grow food. It could get bad in the meantime.
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I'm guessing that is based on dollar amounts rather than calories? In other words, CA may appear to have a larger share than the reality if they focus on more expensive crops like avocados, pistachios, and almonds.
It's not even just California either. The Ogallala aquifer that underlies the Midwest corn belt is also running low. That's 90% of national corn production and affects basically everything that uses corn starch or HFCS.

Unsustainable agriculture will get ugly.

Hm. Pistachios, cashews, almonds, various nuts also land on the shelves of German Aldi and Lidl in convenient 200g bags.
Back in the 1980s in Europe, almonds and pistachios came from Turkey (and possibly Bulgaria) and cashews from Angola. I don't know if this is still the case.
Some still do, I guess. I just described what I saw on the packaging of Aldi's and Lidl's own brands. I think some of that applies to fruit juices also, but there they only sometimes declare from where the ingredients come.
Much of what we grow in arid land is exported. Let’s stop growing wet crops in arid land just to send to China to feed pigs.
Geologically, that area has ALWAYS been desert, with the only exception being the past 150 years. Not surprised.
Exactly. Cadillac Desert is a great account of the water politics of California and it also highlights that the agreements and contracts were set during an unusually wet period.

Growing water intensive crops in the high desert is insanity.

Californians seem to be suprised. I know its a different use case. But, it always brings to mind Las Vegas.

It strikes me as a gross statment to the sheer will of man to remake resources into its will. Additionally it stands as an example of our current priorities and how power manifests. Don't get me wrong, I love Vegas and also the food California produces.

At somepoint in the near future we will need to have difficult disscussions more widely about resources which were bountiful until late.

https://wrrc.arizona.edu/publications/arroyo-newsletter/shar...

Always is a strong word. Seas become deserts and deserts become seas. Just not within 150 years.
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Back in 2015, another drought year, the head of the water board gave a really interesting talk to the MIT Bay Area club: http://techtv.mit.edu/collections/mitcnc/videos/31839-califo...

In it she said that California didn’t have as much a water problem as a water capture and storage problem. All of the capture and storage was built during wet years and if we could capture storm runoff even in places like LA we’d be in a far better situation. It was a really interesting talk I recommend to anyone living in CA.

Sounds like desertification to me. We're going to need some serious geo-engineering to return and maintain earlier climate, lest all our society reorganize all it's components.
The descriptive comments here look like they come out of the "Two Degrees" chapter of Mark Lynas's 2007 book, Six Degrees.[1]

Lynas summarized climate science as it was in about 2005, and organised the summary by temperature increase. Each chapter is named after its upper bound, so "Two Degrees" describes changes expected with the global temperature increase between 1 and 2 degrees. Lynas gives up after six degrees.

Let me repeat the 2007 bit, in case you missed it. We knew this would happen. People were told. If you think actions will be taken now, ask yourself what's different from 2008.

1. https://marklynas.org/books/six-degrees-our-future-on-a-hott...

It would be nice if someone figured out a good method for large scale desalination. The entire California-water problem could be solved that way.