ESPM 50AC Lecture 27: ESPM Lecture 27 notes
29 Nov 2016
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La drought: need to have a lot more rain than normal to cancel out. Most severe in usa is in ca and west nevada. 2011: no drought, 2015: extreme drought except so cal near arizona. 2016: most nor cal, east cal not in drought. Groundwater takes thousand, million years to refresh itself. Lakes and rivers: 1 % we can take if we take too much then the ecology changed in a way that endangers native habitat. Most water is a little in san jocquin, most in norcal. Delta region northeast of berkeley fed from entire ca central valley river. It takes 30 billion gallon per year to operate water in ca. Tap water: come from macalone river private east bay reservoir. Central valley water act 1933 and constructed in 1935. 1945: 2nd california gold rush 1960: ca water resource bond act. Pump water out to reduce bay area flooding. An acre is three-fourth of a football field.
