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

xii
Figure C12. Map showing virtual crops for 2000, including a pie chart of percentage of
different virtual crops .......................................................................................................145
Figure C13. Graphs showing monthly crop coefficients for virtual crops in the
Central Valley, California ..................................................................................................147
Figure C14. Graph showing relation between hydraulic conductivity and percentage
coarse-grained deposits based on hydraulic conductivity end members and
exponent of the power mean ..........................................................................................155
Figure C15. Map of distribution of calibration data (groundwater levels, gains and
losses of streamflow, and subsidence observations)................................................162
Figure C16. Map of distribution of wells with water-level-altitude data for the
simulation period 1961–2003, and location of wells selected for model
calibration ..........................................................................................................................164
Figure C17. Graph of plots of simulated water-level altitude values compared with the
measured water-level altitudes for the A, Entire modeled area (and with inset
with histogram of residuals). B, Sacramento Valley. C, Delta and Eastside.
D, San Joaquin Basin. E, Tulare Basin ..........................................................................165
Figure C18. Maps of the simulated A, Water-table altitude in spring 1976.
B, Potentiometric-surface altitude in spring 1976 for the calibrated transient
groundwater-flow model of the Central Valley ............................................................168
Figure C19. Map showing distribution of stream gain/loss segments used for model
calibration A, Measured gaining and losing reaches for selected stream
reaches for 1961–1977. B, Simulated gaining and losing reaches for
selected stream reaches for 1961–1977 for the Central Valley, California ..............171
Figure C20. Map of distribution of historical subsidence, estimated from 1961 to
1977 extensometer data, Central Valley, California .....................................................174
Figure C21. A, Map of distribution of total simulated subsidence for water years
1962 through 2003, and locations of subsidence measurements. B, Graph
of aggregate compaction measured at, and simulated subsidence for,
selected extensometer locations, Central Valley, California .....................................175
Figure C22. Graph of agricultural pumpage from 1961–77 estimated from power
records compared to Central Valley Hydrologic Model simulated agricultural
pumpage for the Central Valley, California ...................................................................180
Figure C23. Graph showing A, Annual water deliveries. B, Monthly water deliveries
from the mid 1970s to mid 1980s for water-balance subregion 14 ............................182
Figure C24. Graph showing single and double cropped crop coefficient values for
truck crops .........................................................................................................................183
Figure C25. Graph showing original and adjusted crop coefficient values for truck and
cotton crops .......................................................................................................................184
Figure C26. Map showing distribution of cells used for streams, colored by streambed
hydraulic conductivity values for cells estimated during calibration ......................190
Figure C27. Graph showing relative composite sensitivity of computed water-level
altitudes, flows, and subsidence information at calibration points to changes
in parameters .....................................................................................................................192