Increasing water diversion projects or infrastructure to "hide" water from evaporative effects of the sun or divert water from natural basins already over tapped are lose/lose zero sum propositions - we already know this. Ask anyone who works at the DWR. The more we interfere with the natural water cycle from source to sea, the greater the effect of drought and widespread panic during dry years and even drier years to come.
The
California Water Project is the largest water diversion system in the world. There is really no place in this state where the SWP has not left an indelible and destructive footprint.
The solution really lies in policy and the surcharge that needs to be assessed for people who either chose to live farthest from the natural water source and the agribusinesses that chose to grow water intensive crops.
If you come right now to where I live in Sutter County, you will see plenty of water lying in hundreds of thousands of acres of rice fields this very minute. I realize this is last years allocation, but it's the same every year. If farmers don't get their allocation of water, they demand government subsidies while bitching about welfare moms and illegals ruining this country. Where do rice profits go? A friend of mine who is a rice exchange owner travels all over the Pacific Rim selling California Rice. Who profits from it? Hundreds of thousands of acres of private and corporately owned land flooded twice a year so that a small percentage of individuals can get filthy rich. I wouldn't mind so much if they paid a larger percent of taxes, did not receive subsidies, etc. but the worst part is..... they don't even pay a fraction of what you and I pay for a gallon of water. If they did, they would stop growing water intensive crops.
The reality is we continue to support policy, as a state, that enables waste. The ongoing overpopulation of Los Angeles and San Diego and the west central coast is not stopping people from continuing to develop and move there because there is no water penalty. The agribusinesses and corpoate farms continue to grow water intensive crops because their water is practically free. And if we charge them reasonably, they cry for government subsidies. Fuck that!
I won't even get into the diversion tunnels and the plans for fracking the lower Sacramento San Joaquin Valley. Like I said it's all politics.