Return to search results
Evapotranspiration Input Data for the Central Valley Hydrologic Model (CVHM)
This digital dataset contains monthly reference evapotranspiration (ETo) data 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 USGS numerical modeling code
MODFLOW-FMP (Schmid and others, 2006b). 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 that 50 percent of the cells are active. The CVHM 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). The main climatic contributors
to the CVHM are ETo and precipitation. Data from Parameter-Elevation Regressions on Independent Slopes Model
(PRISM) (Climate Source, 2006) provide the temperature and precipitation on a monthly basis for a 2-kilometer grid.
Mapping land-use type and distribution is integral to calculating the crop irrigation demand and, ultimately, the water
use in the Central Valley. For a given land use, the demand can be calculated from two variables: crop coefficient
(Kc) and reference evapotranspiration (ETo). For the CVHM, ETo is calculated from the daily minimum and maximum
air temperatures derived from PRISM data and the extraterrestrial solar radiation (Faunt, 2009, p. 151). 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 monthly reference evapotranspiration (ETo) data 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 USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006b). 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 that 50 percent of the cells are active. The CVHM 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). The main climatic contributors to the CVHM are ETo and precipitation. Data from Parameter-Elevation Regressions on Independent Slopes Model (PRISM) (Climate Source, 2006) provide the temperature and precipitation on a monthly basis for a 2-kilometer grid. Mapping land-use type and distribution is integral to calculating the crop irrigation demand and, ultimately, the water use in the Central Valley. For a given land use, the demand can be calculated from two variables: crop coefficient (Kc) and reference evapotranspiration (ETo). For the CVHM, ETo is calculated from the daily minimum and maximum air temperatures derived from PRISM data and the extraterrestrial solar radiation (Faunt, 2009, p. 151). 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 |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P956D14I",
"mediaType": "application/http",
"description": "Landing page for access to the data"
},
{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.f67e9683-884b-4a89-a444-19351293ed08.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_f67e9683-884b-4a89-a444-19351293ed08 |
| 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",
"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",
"Trinity County",
"Tulare County",
"Tuolumne County",
"USGS:f67e9683-884b-4a89-a444-19351293ed08",
"Ventura County",
"Yolo County",
"Yuba County",
"boundary",
"evapotranspiration",
"finite-difference model grid",
"grid",
"groundwater",
"hydrogeology",
"hydrology",
"inlandWaters"
]
|
| modified | 2020-11-17T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -123.831528, 34.519871, -117.916328, 40.748631 |
| theme |
[
"Geospatial"
]
|
| title | Evapotranspiration Input Data for the Central Valley Hydrologic Model (CVHM) |
