By Don C. Brunell, Guest Columnist
As we deal with our population growth, we must address sufficient supplies of drinkable fresh water for residential, commercial, agriculture, fisheries and industrial needs.
Not only will our numbers continue to climb, but so will competing pressures for fresh water. While demographers can project population growth fairly accurately and planners are good at assessing future needs, nature controls the supply of rainfall and mountain snowpack; and, when it occurs. Too often, precipitation is “feast or famine.”
For example, precipitation in the California’s agricultural region historically fluctuates with periods of above-average rainfall followed by periods of below average rainfall. In 1897, the Central Valley received 13.6 inches of rain, but only 4.6 inches the following year. In 1958, the region received more than 23 inches of rain while the next yea, it received less than 8 inches.
Most recently, California experienced a severe, four-year drought, culminating in 2015. Two years ago, an estimated 564,000 acres of prime cropland was left unplanted because of the critical water shortage. Economists at the University of California, Davis estimated the drought caused $2.7 billion in economic losses and cost 18,000 farm workers their jobs.
The water shortage was so acute that California Governor Jerry Brown ordered a 25-percent reduction in household usage, which forced many homeowners to rip out their manicured lawns and plant desert plants among sand and rocks.