In the past I've made posts about draining the Bohai Sea over 50 years to create new land the size of the UK, and diking/damming/draining Sundaland, to reclaim an amount of land equal to the Americas (over 2-4 centuries)
Here, I state that focusing on the Taklamakan desert (the oval depression in Xinjiang) specifically offers some advantages
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the population of Xinjiang is already one of the fastest growing in China. So there's already a natural incentive to focus on this area.
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The Taklamakan is huge, 180,000 sqmi. For reference, Germany is 140,000 sqmi, and Turkey is 300,000.
Takla is also basically the size of the North Chinese plain, but with one very important advantage. Note the BROWN color on the map, this means higher elevation (green is low). Takla is much higher than sea level.
The REASON for this highly elevated, but uniformly flat land, is the millennia of sediment deposits laid there from the mountain-fed rivers surrounding it. In other words, the Taklamakan desert should have some of the BEST and also MOST soil in the world (just add water)
- A secondary to the "mountain fed rivers" from above--the fact that it is surrounded by mountains on all sides guarantees moisture stability.
If you were to put water in the Sahara, it may dry up quickly, because of rain/wind patterns, because the Sahara is a very open space. This is not stable.
But if you were to put a bunch of water in the Taklamakan, any evaporated moisture would simply hit the surrounding mountains and condense (leeward and windward), returning back into the basin. Basically, it should be a "one-time fix".
The only issue is physically desalinating and moving that much water into the basin. But once that's done you'll basically have the most fertile and resilient green space on earth.
I would be extremely pissed if I was India and was already facing looming water shortages due to thawing mountains.
that's why my post focused on water desal. It's going to take a lot longer, but it's the safest and most consequence-free method. The water just comes from the ocean, it's essentially a free lunch. I really don't like the idea of diverting rivers, even from wet places, because it will necessarily disturb something, that's just how it is.
However, this is the Brahmaputra, not the Ganges. It flows through Arunachal/Assam straight into Bangladesh, these are the wettest parts of continental India, wetter than the US northeast. It has the highest rainfall in the world, after the Amazon, Papua, and Borneo (excluding ocean rainfall obviously)
I still don't like it that much but it's not as bad as it sounds. I'd still rather they get desal to work somehow though
Another possibility is to dam the Bay of Bengal. It would save Bangladesh from flooding, and it would also create a huge freshwater reservoir with one of the highest rainfall rates in the world. It's also the shortest route water source to the Tarim Basin. Cons: the water pipeline would have to go through India, so geopolitics would have to change radically. Although maybe the benefits of the project could convince the parties to agree, idk.
you cant just build a dam 1000 km long across a kilometers deep ocean to turn literally the largest bay in the world into a freshwater lake
this is your brain on elon musk shit
you mean 600 km
SKorea already built one that's 30 km, it's already been largely drained with recovered land being used for agriculture
The dike (not dam) would be 20x longer, and 10x deeper, true
China's economy is 20x bigger than Korea's, its population is 26x bigger, and cooperation from Indian countries would make this even more feasible
don't confuse actual geoengineering with "lul let's go to mars in underground tunnels because reasons"
the difficulty of such a project most definitely doesnt scale linearly, geoengineering is largely crank musk shit to pretend we dont have to stop using fossil fuels entirely
musk's tunnel shit is so many times more realistic than this proposal
how so?
of course it doesn't, when did I say otherwise? The manpower and combined capabilities of China + India + Bangladesh is also a little bit bigger than those of South Korea
musks shit is more realistic because it can actually be built, itll just be impractical and exclusively for the bourgeoisie. I really dont think you understand the scale of the things youre proposing.
https://en.wikipedia.org/wiki/Northern_European_Enclosure_Dam
This thing (necessary to prevent mayoland from flooding) would cost 1/2 a trillion and take 75 years to complete
A Bengal dam would be the same length but 4x shallower, maybe 300 billion and 20 years to complete, even if we err on the conservative side
It would dam Bangladesh, preventing flooding
It would create a freshwater reservoir the same volume as lake Erie, but with 2.5x as much rainfall.
Bengal ---> Xinjiang is also the shortest possible route water can take, without disrupting other rivers/lakes
Alternatively, they could divert the Brahmaputra and replace the lost water with the newly acquired Bay of Bengal water (this is probably cheaper but also more complicated and risky)
Both Bangladesh and India would benefit massively from it, and the only country that wouldn't (Myanmar) happens to be strongly aligned with China already
also the north sea is much shallower than the bay of bengal, and the places they would have to dam all sit on the continental shelf, which the bay of bengal does not. this plan is so unfeasible that even its authors say it is impossible and just a thought experiment, but is still more realistic than your proposal.
i really dont get how youre arriving at your numbers to claim damming the bay of bengal would be the same length but shorter, what i would assume you mean by damming up the bay of bengal is to dam all the way across from Sri Lanka to West Sumatra, even if you mean to dam to Myanmar instead, it becomes even longer and still crosses open ocean kilometers deep.
One final note, the scale of desalination required to transform an entire saltwater ocean into a freshwater resrvoir completely negates the need for a freshwater resevoir in the first place. if you have coastline and enough desalination to do this insane project, you would just cut out the middleman and desalinate your drinking water from the ocean.
Yeah, that's definitely something that might make someone with ongoing border tensions with their neighbour go to war with that neighbour