Still at it, DD? Good for you!
Some of these numbers are pretty big - difficult for us mere mortals to grasp. Luckily, in DD, we have a certified mathematical genius with us (you remind us of your brilliance every day).
So, California's man-made reservoirs can hold 20 million cubic meters of water - according to you. And who would ever doubt you, a certified genius and a man with impeccable integrity as displayed constantly on this thread?
But that 20 million cubic meters is a really, REALLY big number. Hard to even grasp. So, let's try to put it in context.
Maybe this will help. The Earth's oceans cover roughly 361,000,000 square km. That's around 3.6 x 10^14 square meters. Sea levels have been rising at about 5 mm/year recently. That's 5 x 10^(-3) meters. So, the annual sea level rise is the product of these two or 1.8 x 10^12 cubic meters.
Now, how does that compare to the 20 Million cubic meters that California's man-made reservoirs can hold (again, I'm trusting both your genius and integrity here). Well, 20 million is 2.0 x 10^7. Wow, that IS a lot! That is about 1/100,000th of the volume of the annual sea level rise.
All we have to do is build 100,000 times the entire current man-made reservoir capacity of the state of California! And then do it again next year. And the next . . .
You've done it, DD ! You're really on to something here!