If you like oysters, the all-you-can-eat BOP annual fundraiser is one of the best events, in terms of fun and value, one can go to. Purveyors fly in from around the continent to show their wares. The liquor sponsors are great. And the venue is usually unique.
Floods and thus investment in better flood prevention will only increase in the coming decades, it will be interesting what innovative solutions that spawns. It seems like even this century-old branch of engineering still holds room for experimentation with new methods.
Interesting that this particular project is run by a nonprofit. I hope it works out.
There is a museum in SF that shows exactly what would happen if that were to happen. It was proposed in the early 20th century. The conclusions from those experiments they did was it does not end well for most of the bay area if that happens.
If you're ever in the area check out the US army Corp of Engineer's Bay Area hydraulic model. It was built 70 years ago to simulate the effects of one such proposal.
I'll add to that- in addition to wave breaking from shoaling (i.e., transition to shallow depths), coral reefs and oyster beds increase bottom friction.
Surface waves are only the displacements on the surface that we see. The water column is also perturbed below the surface, and depending upon on the wavelength and amplitude, the perturbation can go down pretty far.
If you track the water particles as the waves pass by, you would see the particles traveling up and down and back and forth in orbital motions. In shallow water (relative to the wavelength), the sea bottom prevents downward motion, so the orbital motion is flattened into a back and forth motion near the bottom, and near the surface the waves increase height and break at the top.
If you have things like coral reefs or oysters (or an undersea wall), the back and forth motion is impeded, and energy from the wave is dissipated (which reduces the surface displacement).
for >90% (a made up stat) of the population, it does though. the majority of people are too lazy to double check any of the information they learn from whatever source they are receiving it. the people making these edits know this. they lose no sleep at night about it.
The poster literally copied only half the quote. The second half of the quote is “But they’re a critical part of the many different interventions that need to happen.” Does the original comment really seem accurate to you?
Might as well give up then, why bother if it won't singlehandedly save the city? If Batman wouldn't do it, neither will I. Incremental improvements are for idiots.
Restoring New York City’s natural flood defence’s is insufficient per se. We will still need to build a wall. That doesn’t mean we should only build the sea wall.
what do you mean? In time, those nets will start to degrade and spread in the water. You will have billions of little plastic pieces floating around. How do you get them out?
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[ 3.1 ms ] story [ 101 ms ] threadInteresting that this particular project is run by a nonprofit. I hope it works out.
but how is an undersea wall going to even partially reduce flooding, exactly?
https://www.watereducation.org/aquapedia/san-francisco-bay-m...
They interfere with storm surges. The same way reefs force waves to break, dissipating their energy offshore.
Surface waves are only the displacements on the surface that we see. The water column is also perturbed below the surface, and depending upon on the wavelength and amplitude, the perturbation can go down pretty far.
If you track the water particles as the waves pass by, you would see the particles traveling up and down and back and forth in orbital motions. In shallow water (relative to the wavelength), the sea bottom prevents downward motion, so the orbital motion is flattened into a back and forth motion near the bottom, and near the surface the waves increase height and break at the top.
If you have things like coral reefs or oysters (or an undersea wall), the back and forth motion is impeded, and energy from the wave is dissipated (which reduces the surface displacement).
Here's an article on experiments quantifying the energy dissipation: https://www.mdpi.com/2077-1312/9/9/1007
https://youtu.be/3yNoy4H2Z-o
In fact they haven't even genuinely summarised even the quote they have half-copied. Let alone the article.
> I find these flippant comments rather annoying
What I find annoying is the tendency to drag half a sentence out of context and parade it around as if that proves some point.
https://www.billionoysterproject.org/volunteer