Faunt, Claudia C. 2012 vector digital data Professional Paper 1766 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?pp1766_cvhm_texture_regions Faunt, Claudia C. (editor) 2009 Reston, Virginia U.S. Geological Survey 3 chapters, 1 appendix 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). The 9 major areas were used to subdivide the Central Valley for the interpolation of the percentage of coarse-grained deposits into the texture model. The texture model was used as input to MODFLOW-FMP, the USGS 3-dimensional finite-difference code used to simulate flow in the CVHM. The CVHM is a tool that accounts for integrated, variable water supply and demand, and simulates surface-water and groundwater-flow across the entire Central Valley system. The texture-model major-areas dataset is one of many layers in a geospatial database supporting the USGS Central Valley Groundwater Availability Project. Regional groundwater availability studies quantify current groundwater resources, evaluate how those resources have changed through time, and provide tools that decision makers can use to predict system responses to future development and climate variability and change. To provide information to stakeholders addressing these issues, the USGS made a detailed assessment of groundwater availability of the Central Valley aquifer system, which includes: (1) the present status of groundwater resources; (2) characterization of 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 various scales. Data from these previous studies were the foundation of the Central Valley geospatial database. These and other data were re-examined through a series of regional-scale hydrologic investigations to provide updated and spatially consistent interpretations for the Central Valley Groundwater Availability study. In some cases, new data were collected to augment existing information. Data compiled from the studies include geology (in particular, borehole lithology and the extent and thickness of the Corcoran Clay Member of the Tulare Formation), topography, remote sensing, climate (precipitation and temperature), geophysics, vegetation and land use, vegetation properties, hydrology (stream network and flows), groundwater levels, subsidence, chemistry, and soils. Digital elevation models, geologic maps, borehole information, cross sections, and other 3-dimensional models were used to develop the texture model which represents the properties and geometry of the Central Valley alluvial deposits. The resulting geospatial database supports characterization and conceptualization of the Central Valley hydrologic system between 1961 and 2003, construction of 3-dimensional hydrogeologic framework and hydrologic flow models, and visualization of analysis and model results. 2009 publication date Complete None planned -122.641382 -118.472608 40.702574 34.889516 ISO 19115 Topic Category geoscientificinformation American Geological Institute Glossary of Geology (http://glossary.agiweb.org/dbtw-wpd/glossary/search.aspx) hydrology hydrogeology groundwater model none Central Valley Aquifer Central Valley Hydrologic Model Texture Model Flow Model CVHM CV-RASA Groundwater Availability of the Central Valley Aquifer U.S. Board of Geographic Names (BGN) and Geographic Names Information System (GNIS) California Central Valley Trinity County Shasta County Tehama County Humboldt County Butte County Mendocino County Glenn County Yuba County Lake County Nevada County Colusa County Sutter County Placer County El Dorado County Yolo County Sonoma County Napa County Sacramento County Amador County Solano County Calaveras County Tuolumne County San Joaquin County Contra Costa County Stanislaus County Alameda County Mariposa County Madera County Merced County Fresno County Santa Clara County San Benito County Monterey County Tulare County Kings County Kern County San Luis Obispo County Santa Barbara County Ventura County Sacramento Valley San Joaquin Valley Central Valley, California None. Data have been checked to ensure the accuracy of the data. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology. Claudia C. Faunt U.S. Geological Survey Hydrologist mailing and physical address

California Water Science Center

San Diego California 92101 USA (619) 225-6142 (619) 225-6101 ccfaunt@usgs.gov http://water.usgs.gov/GIS/browse/pp1766_cvhm_texture_regions.png Illlustration of data set png Spatial datasets supporting the Central Valley Groundwater Availability project were developed primarily by the U.S. Geological Survey's (USGS) Groundwater Resources Program. This program is conducting large-scale multidisciplinary regional studies of groundwater availability. The U.S. Bureau of Reclamation is supporting the updating of the Central Valley datasets and their documentation and release. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500 Schmid, Wolfgang Hanson, R. T. Maddock, Thomas, III Leake, S. A. 2006 Techniques and Methods 6-A17 Sacramento, CA USGS California Water Science Center http://pubs.usgs.gov/tm/2006/tm6A17/ Attributes added by the GIS and the data-set author were checked by inspection using a GIS. In addition, attributes were checked and evaluated as part of the review process associated with the publication of the source report. Lines forming polygons join at endpoints to completely enclose defined areas. Lines not enclosing areas do not intersect. No duplicate line features exist and all nodes are represented by a single coordinate pair which indicates the beginning or end of a line. All vertices that define the shape of the line are represented by a unique coordinate pair. The shape file shows a subset of groundwater basins and subbasins as defined by the California Department of Water Resources Bulletin 118. Groundwater basins are designated on the basis of geological and hydrological conditions, these usually being the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. Basins are named and numbered per the convention of the Department of Water Resources. The dataset is complete and is not anticipated to change. Horizontal positional accuracy of line features in the dataset was tested by visually comparing to digital source maps by using a GIS system. Faunt, C. C. Hanson, R.T. Belitz, K. 2009 document U.S. Geological Survey Professional Paper 2009-1766 Reston, Virginia U.S. Geological Survey Faunt, C.C. 2009 U.S. Geological Survey Professional Paper 2009-1766 Reston, Virginia U.S. Geological Survey 500000 online 2009 publication date Faunt and others (2009) See Professional Paper 1766 - Groundwater Availability of the Central Valley Aquifer, California. California Department of Water Resources 2003 Groundwater Update Bulletin 118 Sacramento, CA California Department of Water Resources http://www.water.ca.gov/groundwater/bulletin118/update2003.cfm online 2009 publication date CA DWR (2003) percentage of coarse-grained deposits A digital shapefile was obtained for major groundwater basins of the Central Valley (CA-DWR, 2003). A subset was chosen as representative for the textural analysis in this study. CA-DWR (2003) Unknown Faunt, C.C. USGS Hydrologist mailing and physical address

4165 Spruance Road, Suite 200

San Diego CA 92101 USA (619) 225-6142 ccfaunt@usgs.gov Central Valley, comprised of the Sacramento Valley on the north and the San Joaquin Valley on the south, located in the state of California. Vector G-polygon 13 Albers Conical Equal Area 29.500000 45.500000 -120.000000 23.000000 0.000000 0.000000 coordinate pair 100 100 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 cvhm_texture_regions Central Valley Hydrologic Model Texture Regions dataset originator FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. MajorArea Textural analysis spatial provinces and domains dataset originator Spatial Province goupings of similar groundwater domains Metadata Author 10 Spatial Province Number for Redding dataset originator 11 Spatial Province Number for Western Sacramento dataset originator 12 Spatial Province Number for Eastern Sacramento dataset originator 20 Spatial Province Number for Tracy/Delta Mendota dataset originator 21 Spatial Province Number for Westside dataset originator 22 Spatial Province Number for Northern San Joaquin dataset originator 23 Spatial Province Number for Chowchilla-Madera dataset originator 24 Spatial Province Number for Kings dataset originator 30 Spatial Province Number for Tulare/Kern dataset originator Domain goupings of similar groundwater subbasins dataset originator Redding Redding groundwater subbasin domain dataset originator Western Sacramento Western Sacramento groundwater subbasin domain dataset originator Eastern Sacramento Eastern Sacramento groundwater subbasin domain dataset originator Tracy/Delta-Mendota (above Corcoran Clay) Tracy/Delta-Mendota (above Corcoran Clay) groundwater subbasin domain dataset originator Tracy/Delta-Mendota (Corcoran Clay absent) Tracy/Delta-Mendota (Corcoran Clay absent) groundwater subbasin domain dataset originator Westside (above Corcoran Clay) Westside (above Corcoran Clay) groundwater subbasin domain dataset originator Westside (Corcoran Clay absent) Westside (Corcoran Clay absent) groundwater subbasin domain dataset originator Northern San Joaquin (above Corcoran Clay) Northern San Joaquin (above Corcoran Clay) groundwater subbasin domain dataset originator Northern San Joaquin (Corcoran Clay absent) Northern San Joaquin (Corcoran Clay absent) groundwater subbasin domain dataset originator Chowchilla-Madera (above Corcoran Clay) Chowchilla-Madera (above Corcoran Clay) groundwater subbasin domain dataset originator Chowchilla-Madera (Corcoran Clay absent) Chowchilla-Madera (Corcoran Clay absent) groundwater subbasin domain dataset originator Kings (above Corcoran Clay) Kings (above Corcoran Clay) groundwater subbasin domain dataset originator Kings (Corcoran Clay absent) Kings (Corcoran Clay absent) groundwater subbasin domain dataset originator Tulare/Kern (above Corcoran Clay) Tulare/Kern (above Corcoran Clay) groundwater subbasin domain dataset originator Tulare/Kern (Corcoran Clay absent) Tulare/Kern (Corcoran Clay absent) groundwater subbasin domain dataset originator There are 13 records in this shapefile. It has two attributes that are generated by the GIS (FID and Shape) for internal software purposes. The remaining attribute was assigned by the author (dataset Originator) to define the Central Valley Hydrologic Model Texture Regions which were used for kriging. This data was used for analysis and for developing input files for the CVHM textural model and numerical ground-water flow model. none. U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Digital geospatial datasets for the textural model and numerical model of the hydrogeologic landscape and groundwater flow in California's Central Valley. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. SHP ESRI Shapefile 0.0520019531 http://water.usgs.gov/GIS/dsdl/pp1766_cvhm_texture_regions.zip None. This dataset is provided by the USGS as a public service. 2011 20120824 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Datase+pp1766_cvhm_texture_regions FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998