Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Location of virtual wells used for urban (municipal and industrial use) pumpage in the Central Valley Hydrologic Model (CVHM)

Metadata Updated: June 19, 2024

This digital dataset contains the virtual wells used for urban (municipal and industrial use) pumpage for the Central Valley Hydrologic Model (CVHM). 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). 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. 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).

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date May 31, 2023
Metadata Updated Date June 19, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date May 31, 2023
Metadata Updated Date June 19, 2024
Publisher U.S. Geological Survey
Identifier USGS:4e5ad26b-a459-469f-abfd-6e37ef781b6f
Data Last Modified 20201117
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id c8370186-cfa9-4f51-8fbd-e8abc38bb5d5
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -122.482403,34.970183,-118.732508,40.675448
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash ccb90efc4bd101ac31eca51149ddbfffe3be1160d2a4d998330cc11b530ebb7c
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -122.482403, 34.970183, -122.482403, 40.675448, -118.732508, 40.675448, -118.732508, 34.970183, -122.482403, 34.970183}

Didn't find what you're looking for? Suggest a dataset here.