MODFLOW2000_FMP1_1 model used to simulate the groundwater flow of the Central Valley Aquifer, California

Metadata Updated: December 4, 2018

A three-dimensional groundwater flow model (MODFLOW200-FMP1_1) of the Central Valley in California was developed to aid water managers in understanding how water moves through the aquifer system, to predict water-supply scenarios, and to address issues related to water competition. The USGS Groundwater Resources Program made a detailed assessment of groundwater availability of the Central Valley aquifer system, which includes: (1) the present status of groundwater resources; (2) how these resources have changed over time; and (3) tools to assess system responses to stresses from future human uses and climate variability and change. This effort builds on previous investigations, such as the USGS Central Valley Regional Aquifer System and Analysis (CV-RASA) project and several other groundwater studies in the Valley completed by Federal, State and local agencies at differing scales. The principal product of this new assessment is a tool referred to as the Central Valley Hydrologic Model (CVHM) that accounts for integrated, variable water supply and demand, and simulates surface-water and groundwater-flow across the entire Central Valley system. The current model was extended to incorporate a slightly larger geographic area, has a finer spatial and temporal discretization, uses a more-detailed depiction of subsurface geology. In addition, the model utilizes a modified version of MODFLOW2000 (version 1.15.03) to include an updated and refined Farm Process (FMP1) to simulate groundwater and surface-water flow, irrigated agriculture, land subsidence, and other key processes in the Central Valley on a monthly basis for April 1961 through September 2003. This USGS data release contains all of the input and output files for the simulation and calibration of the CVHM described in the associated model documentation report (

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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.

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Metadata Date June 20, 2017
Metadata Created Date December 1, 2018
Metadata Updated Date December 4, 2018
Reference Date(s) January 1, 2017 (publication)
Frequency Of Update notPlanned
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI CKAN Harvest Source

Graphic Preview

Image of the model domain and active area of the model.

Additional Metadata

Resource Type Dataset
Metadata Date June 20, 2017
Metadata Created Date December 1, 2018
Metadata Updated Date December 4, 2018
Reference Date(s) January 1, 2017 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: none, Access Constraints: None. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from this data release.
Bbox East Long -117.916328
Bbox North Lat 40.748631
Bbox South Lat 34.519871
Bbox West Long -123.831528
Coupled Resource
Frequency Of Update notPlanned
Graphic Preview Description Image of the model domain and active area of the model.
Graphic Preview File
Graphic Preview Type jpg
Harvest Object Id d16db576-2af2-4bb1-acbd-b81ef6e04b04
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence The data have been approved for release by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from authorized or unauthorized use. Although the data, software, and related material have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 1961-04-01
Temporal Extent End 2003-09-30

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