From the policy mavens at California Globe, November 18:
Spending $100 billion on these projects will ensure perpetual water abundance
Everyone in California agrees that water policies need to adapt to changing times. There is even growing agreement that enforcing draconian reductions to farm water allocations (which will eliminate all but the most powerful corporate agribusinesses) and outlawing household outdoor watering will not only fail to solve the problem, but is a tough and undesirable solution. And so the debate over more rationing versus more water supply projects goes on.
Missing from the debate over water policy in California, however, especially among the state legislators who need to do something about it, are some basic overall metrics regarding how much water we need, what various types of water projects cost, how much potential capacity each type of project delivers, and how much energy is involved. Here’s a summary.
When quantifying macro variables of this nature, first it is important to note that for any project category, costs are not uniform. A wastewater recycling plant, for example, will cost more to construct and more to operate depending on the type of wastewater it has to process. The cost to build and operate a conveyance to deliver water from a recycling plant or desalination plant direct to the consumer or to a storage facility will vary depending on the length of the conveyance and any necessary elevation changes. So these are rough numbers. They are nonetheless vital to begin a more informed discussion of water policy options in California.
The primary measurement used to describe large amounts of water are units of one million acre feet (MAF). To provide an overall perspective, in a wet year, up to 300 MAF of rain falls within California’s borders. With the exception of the upper Klamath Basin, and a few lesser examples, California’s geography is such that our watersheds are roughly congruent with our state border. In a dry year, as little as 100 MAF of rain falls in California. This rainfall either percolates, transpirates, evaporates, or runs down the streams and rivers to the ocean.
Also each year, Californians currently divert about 75 MAF as follows: about 8 MAF to urban water consumers, 34 MAF to farmers, and 34 MAF of “environmental water” to maintain wetlands, river ecosystems, and the health of the Sacramento-San Joaquin Delta. These numbers represent the seven year average between 2011 and 2018 as reported by the California Dept. of Water Resources.
During these same seven years, to divert 75 MAF each year, California got 5 MAF from the Colorado River, 19 MAF from groundwater extraction, 15 MAF from reuse and recycled water, 6 MAF from federal water projects, and 7 MAF from local water projects. For much more details on what’s behind these numbers, refer to the 2018 update of the California Water Plan.
To harvest more water from increasingly unpredictable rainfall, to recycle more water that would otherwise be treated and released into the Pacific, and to desalinate brackish water inland and ocean water on the coast, here are some cost estimates. As an aside, this is a hypothetical plan. Do not be alarmed. Plans change. Let’s all work together....
....MUCH MORE
Recently on Cali water: November 15, 2022 "Desalination: California Is Waking Up To Reality"
Also at California Globe:
November 21: "California Threatens to Ban Diesel Trucks, Worsening Supply Chain Backlogs"
November 21: "Department of Energy Awards $1.1 Billion In Funding For Diablo Canyon Plant Extension"
Previously on Diablo Canyon:
December 2021: "Regarding California's Shutdown of The Diablo Canyon Nuclear Plant"
August 18: "Shutdown Plans Reversed? "California could lend PG&E $1.4 billion to save Diablo Canyon nuclear plant""
September 1, 2022: ""UPDATE 1—California lawmakers extend life of nuclear plant, approve slate of climate bills""
