But there may be a less-expensive way to increase water flows into the Central Valley: Start thinning out the overgrown Sierra Nevada forests.

Cutting down trees may not sound environmentally friendly, but researchers from UC Merced and elsewhere think that may be just what’s needed to restore forest health and increase water runoff.
http://www.modbee.com/2014/03/24/3257376/overgrown-sierra-forests-gulping.html?sp=/99/1571/&ihp=1