Spatial Provinces and Domains of the Central Valley for Textural Analysis
This digital dataset contains the 9 major areas used to subdivide the Central Valley for the interpolation of the
percentage of coarse-grained deposits into the texture model. This texture model was used as input data for
the hydraulic properties portion of 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 USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006).
This simulation 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). In order to better characterize the aquifer-system deposits, lithologic
data from approximately 8,500 drillers' logs of boreholes ranging in depth from 12 to 3,000 feet below land surface
were compiled and analyzed. The percentage of coarse-grained sediment, or texture, then was computed for each
50-foot depth interval of the drillers' logs. A 3-dimensional texture model was developed by interpolating the percentage
of coarse-grained deposits onto a 1-mile spatial grid at 50-foot-depth intervals from land surface to 2,800 feet below
land surface. 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).
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "Claudia C. Faunt",
"@type": "vcard:Contact",
"hasEmail": "mailto:ccfaunt@usgs.gov"
}
|
| description | This digital dataset contains the 9 major areas used to subdivide the Central Valley for the interpolation of the percentage of coarse-grained deposits into the texture model. This texture model was used as input data for the hydraulic properties portion of 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 USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006). This simulation 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). In order to better characterize the aquifer-system deposits, lithologic data from approximately 8,500 drillers' logs of boreholes ranging in depth from 12 to 3,000 feet below land surface were compiled and analyzed. The percentage of coarse-grained sediment, or texture, then was computed for each 50-foot depth interval of the drillers' logs. A 3-dimensional texture model was developed by interpolating the percentage of coarse-grained deposits onto a 1-mile spatial grid at 50-foot-depth intervals from land surface to 2,800 feet below land surface. 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). |
| distribution |
[
{
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"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P9Y4MR92",
"mediaType": "application/http",
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"@type": "dcat:Distribution",
"title": "Original Metadata",
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"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.c608e00e-c1ee-4403-8177-549daa48a10c.xml"
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|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_c608e00e-c1ee-4403-8177-549daa48a10c |
| keyword |
[
"Alameda County",
"Amador County",
"Butte County",
"CV-RASA",
"Calaveras County",
"California",
"Central Valley",
"Central Valley Aquifer",
"Central Valley Hydrologic Model",
"Central Valley, California",
"Colusa County",
"Contra Costa County",
"El Dorado County",
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"Fresno County",
"Glenn County",
"Groundwater Availability of the Central Valley Aquifer",
"Humboldt County",
"Kern County",
"Kings County",
"Lake County",
"Madera County",
"Mariposa County",
"Mendocino County",
"Merced County",
"Monterey County",
"Napa County",
"Nevada County",
"Placer County",
"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:c608e00e-c1ee-4403-8177-549daa48a10c",
"Ventura County",
"Yolo County",
"Yuba County",
"geoscientificinformation",
"groundwater",
"hydrogeology",
"hydrology",
"inlandWaters",
"model"
]
|
| modified | 2020-11-17T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -122.641382, 34.889516, -118.472608, 40.702574 |
| theme |
[
"Geospatial"
]
|
| title | Spatial Provinces and Domains of the Central Valley for Textural Analysis |
