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Altitudes of the top of model layers in the Central Valley Hydrologic Model (CVHM)

Metadata Updated: February 14, 2024

This digital dataset defines the model grid and altitudes of the top of the 10 model layers and base of the model simulated in the transient hydrologic model of the Central Valley flow system. 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 USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006), which estimates dynamically integrated supply-and-demand components of irrigated agriculture as part of the simulation of surface-water and ground-water flow based on MODFLOW-2000. This application is referred to here as the Central Valley Hydrologic Model (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 an approximately 20,334 square-miles on a finite difference grid comprising 441 rows, 98 columns. Slightly less that 50 percent of the cells are active. It has a uniform horizontal discretization of 1x1 square mile and is oriented parallel to the valley axis, 34 degrees west of north (Faunt, 2009).The thickness of model layers is derived by sequentially subtracting the altitudes of the uppermost to the lowermost model layers. Most model layers range in thickness from 15 to more than 300 meters, and thickness generally increases with depth (Faunt, 2009). The upper 3 model layers are used to simulate the relatively shallow flow through basin-fill sediments.
Layers 4 and 5 are used to represent the Corcoran Clay Member of the Tulare Formation. The lower 5 layers are used to simulate the confined deeper portion of the basin-fill sediments. The CVHM is the most recent regional-scale model of the Central Valley developed by the U.S. Geological Survey (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.

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Dates

Metadata Created Date June 1, 2023
Metadata Updated Date February 14, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date February 14, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/c758ff248a7af64a70a1ae65bf21c26a
Identifier USGS:7d809d3b-07b4-41f6-af71-ab2aad83bc46
Data Last Modified 20201117
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datainventory.doi.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id bff43d44-9abb-4407-ac23-7e5b8e20a912
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -123.831528,34.519871,-117.916328,40.748631
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 6ba57cbd99994c2274a0e86fd0bc7c953d630ae7de9508ab604158bef95f1a52
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -123.831528, 34.519871, -123.831528, 40.748631, -117.916328, 40.748631, -117.916328, 34.519871, -123.831528, 34.519871}

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