Central Valley Aquifer, Chapters A and B - MAE Class Websites

CUMULATIVE DEPARTURE OF STREAMFLOW DIVERSION, IN ACRE-FEET PER YEAR
300
200
100
0
-100
-200
Cool (Negative) Warm (Positive)
Cool
(Negative)
"Variable"
to
Dry
"Variable"
to
Wet
-
). In addition,
Dry Wet
Dry
TIME, IN YEARS
Groundwater
Hydrogeology 47
"Variable"
to
Dry
1960 1965 1970 1975 1980 1985 1990 1995 2000 2005
Cool
(Negative)
EXPLANATION
Periods of Pacific Decadal Oscillation [PDO]
(Mantua, 2006)
Bear River Diversion cumulative departure average
Cumulative annual temperature difference, 1964-2003
Pacific Decadal Oscillation (PDO) average annual value
Figure A19. Cumulative departure of streamflow diversions from the Bear River by South Sutter Water District, California; cumulative
annual temperature from California Irrigation Management Information System’s (CIMIS) stations at Davis and the Pacific Decadal
Oscillation (PDO) index, 1960–2004.
Wet
-2.0
-4.0
-6.0
-
6.0
4.0
2.0
0.0
CUMULATIVE ANNUAL TEMPERATURE DIFFERENCE, IN DEGREES FAHRENHEIT
PDO-INDEX, UNITLESS