Monthly urban (municipal and industrial use) pumpage for the Central Valley Hydrologic Model (CVHM) by Water Balance Subregion (WBS)

This digital dataset contains the monthly urban (municipal and industrial use) pumpage for the Central Valley 
Hydrologic Model (CVHM) by Water Balance Subregion (WBS).  The Central Valley encompasses an 
approximate 50,000 square-kilometer region of California. The complex hydrologic system of the Central 
Valley is simulated using the U.S. Geological Survey(USGS) numerical modeling code MODFLOW-FMP 
(Schmid and others, 2006).  This application is referred to here as the CVHM (Faunt, 2009). Utilizing 
MODFLOW-FMP, the CVHM simulates groundwater and surface-water flow, irrigated agriculture, land 
subsidence, and other key processes in the Central Valley on a monthly basis from 1961-2003.  The total 
active modeled area is 20,334 square-miles on a finite difference grid comprising 441 rows and 98 columns. 
Slightly less than 50 percent of the cells are active. The CVHM model grid has a uniform horizontal 
discretization of 1x1 square mile and is oriented parallel to the valley axis, 34 degrees west of north 
(Faunt, 2009). Groundwater pumpage is a major part of the groundwater budget of the Central Valley, 
and is grouped into two categories for this study: agricultural and urban (which includes municipal and 
industrial sources))(Diamond and Williamson, 1983). Urban wells were simulated as multi-node wells 
(Halford and Hanson, 2002) (Faunt, 2009; fig. C3). In each WBS, a single well was placed in each model 
cell where the predominant land use for a given time frame was urban (Brush, 2007). Because the extent 
of urban areas changes through time, wells were added and deleted accordingly in the model during the 
simulation period. In general, agricultural wells were replaced by urban wells in the model as the land use 
changed from agricultural to urban. The single well per model cell represents the composite of all wells in 
each square-mile cell and is referred to here as a virtual well. The CVHM is the most recent regional-scale 
model of the Central Valley developed by the USGS. The CVHM was developed as part of the USGS 
Groundwater Resources Program (see "Foreword", Chapter A, page iii, for details).

Tags: alameda-county, amador-county, butte-county, calaveras-county, california, central-valley, central-valley-aquifer, central-valley-california, central-valley-hydrologic-model, colusa-county, contra-costa-county, cv-rasa, el-dorado-county, environment, flow-model-cvhm, fresno-county, geoscientificinformation, glenn-county, groundwater, groundwater-availability-of-the-central-valley-aquifer, humboldt-county, hydrogeology, hydrology, inlandwaters, kern-county, kings-county, lake-county, madera-county, mariposa-county, mendocino-county, merced-county, model, monterey-county, napa-county, nevada-county, placer-county, pumpage, sacramento-county, sacramento-valley, san-benito-county, san-joaquin-county, san-joaquin-valley, san-luis-obispo-county, santa-barbara-county, santa-clara-county, shasta-county, solano-county, sonoma-county, stanislaus-county, sutter-county, tehama-county, texture-model, trinity-county, tulare-county, tuolumne-county, usgs-5e0a5182-1a30-40a1-aa6d-a87e165ebced, ventura-county, virtual-well, yolo-county, yuba-county
Organization: Department of the Interior