Central Valley Aquifer, Chapters A and B - MAE Class Websites
Central Valley Aquifer, Chapters A and B - MAE Class Websites
Central Valley Aquifer, Chapters A and B - MAE Class Websites
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CUMULATIVE DEPARTURE OF PRECIPITATION AND<br />
REFERENCE EVAPOTRANSPIRATION, IN INCHES PER YEAR<br />
10<br />
0<br />
-10<br />
-20<br />
-30<br />
-40<br />
"Variable"<br />
to<br />
Dry<br />
"Variable"<br />
to<br />
Wet<br />
<br />
) <strong>and</strong> is directly dependent on a combina-<br />
<br />
<br />
-<br />
<br />
<br />
).<br />
Dry Wet Dry<br />
Wet<br />
TIME, IN YEARS<br />
Hydrogeology 45<br />
-50<br />
-1.5<br />
1960 1965 1970 1975 1980 1985 1990 1995 2000 2005<br />
EXPLANATION<br />
Annual cumulative departure of<br />
reference evapotranspiration (ETo)—<br />
Red Bluff<br />
Davis<br />
Bakersfield<br />
Annual cumulative departure of precipitation<br />
from PRISM data<br />
Davis<br />
Pacific Decadal Oscillation (PDO) average annual value<br />
"Variable"<br />
to<br />
Dry<br />
Figure A18. Cumulative departure of monthly precipitation (Parameter-elevation Regressions on Independent Slopes Model (PRISM)<br />
data from Davis, California), cumulative departure of the Pacific Decadal Oscillation (PDO) index, <strong>and</strong> cumulative departure of the<br />
monthly reference evapotranspiration (ETo) values (gridded values of California Irrigation Management Information System’s (CIMIS)<br />
stations from Redding, Davis, <strong>and</strong> Bakersfield, 1960–2004).<br />
-0.5<br />
-1.0<br />
<br />
<br />
-<br />
<br />
<br />
<br />
<br />
<br />
2.0<br />
1.5<br />
1.0<br />
0.5<br />
0.0<br />
PACIFIC DECADAL OSCILLATION (PDO) INDEX, UNITLESS
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