Claudia C. Faunt 2012 tabular digital data Professional Paper 1766 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?pp1766_well-log-texture Faunt, Claudia C. (editor) 2009 Professional Paper 1766 Reston, Virginia U.S. Geological Survey 3 chapters, 1 appendix http://pubs.usgs.gov/pp/1766/PP_1766.pdf This digital dataset contains the percentage of coarse-grained deposits in wells in 15 meter increments and the percentage of coarse-grained deposits in texture model lattice points interpolated from the well data for the Central Valley. The 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 U.S. Geological Survey (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 well-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 from this classification for each 50-foot depth interval of the driller�s logs. A 3D 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 USGS. The CVHM was developed as part of the USGS Groundwater Resources Program (see "Foreword", Chapter A, page iii, for details). The percent of coarse-grained deposits in wells, sectioned in 15 meter increments, was used to build the texture model which was used as input to MODFLOW-FMP, the USGS 3D 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 dataset including percent of coarse-grained deposits in wells in 15 meter increments, and at lattice points 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) 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. Data from these previous studies were the foundation of the Central Valley geospatial database. These and other data were reexamined 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 3D 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 3D hydrogeologic framework and hydrologic flow models, and visualization of analysis and model results. 2009 publication date Complete None planned -123.831528 -117.916328 40.748631 34.519871 ISO 19115 Topic Category hydrogeology geostatistics unconsolidated sediments American Geological Institute Glossary of Geology (http://glossary.agiweb.org/dbtw-wpd/glossary/search.aspx) hydrology hydrogeology model groundwater deposit none Groundwater Availability of the Central Valley Aquifer Central Valley Aquifer Central Valley Hydrologic Model Flow Model CVHM Texture Model CV-RASA 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

4165 Spruance Road, Suite 200

San Diego CA 92101 USA (619) 225-6142 (619) 225-6101 ccfaunt@usgs.gov http://water.usgs.gov/GIS/browse/pp1766_well-log-texture.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. Tabular, non-spatial dataset. Categories were determined by the dataset originator, who transcribed them into this table. Supporting datasets added by the GIS and the dataset author were checked by inspection using a GIS. In addition, the supporting data were checked and evaluated as part of the review process associated with the supporting dataset's original publication. The dataset is complete and is not anticipated to change. Burow, Karen R. Shelton, Jennifer Hevesi, Joseph A. Weissmann, Gary S. 2004 Scientific Investigations Report 2004-5232 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2004/5232/ online 2009 publication date Burow and others (2004) texture database design A database was constructed to organize information on well construction and subsurface lithology in the study area using the database design of Burow et al. (2004). A subset of good-quality driller's logs that were spatially distributed throughout the valley were selected based on specificity of location and degree of detail of geologic description. Texture was then mapped at 15-m depth intervals on a 1.6-km grid. Burow and others (2004) 20111109 12505800 Claudia C. Faunt U.S. Geological Survey Hydrologist mailing and physical address

4165 Spruance Rd

San Diego CA 92101 USA 6192256142 ccfaunt@usgs.gov Metadata imported. C:\DOCUME~1\shouse\LOCALS~1\Temp\xmlC0.tmp 20120620 11243500 Metadata imported. C:\Documents and Settings\shouse\Desktop\well-log-texture.xml 20120620 12374900 Percentage of Course-Grained Deposits Percentage of Coarse-Grained Deposits in Wells in 15-meter Increments and in CVHM Texture-model lattice points dataset originator CELLNUM Hydrologic model grid cell number, beginning in northwest (upper left) and wrapping west to east (left to right) and south (down). dataset originator 92 43072 single cell unit 1 ROW Hydrologic model grid row number, starting in the north and increasing to the south dataset originator Whole numbers that represent specific cells in the model grid COLUMN Hydrologic model grid column number, starting on westside and increasing to the east. dataset originator Whole numbers that represent specific cells in the model grid PC percentage of coarse-grained deposits measured in wells dataset originator 0 100 percent .100000 POINT_X x coordinate of well location in NAD_1983_Albers of cell center dataset originator -219505.60104 111800.14378 meters .00001 POINT_Y y coordinate of well location in NAD_1983_Albers of cell center dataset originator 1326161.87932 1966026.24603 meters .00001 DEPTH_MIDPOINT_METERS z coordinate in meters above mean sea level dataset originator 7.61900 937.21400 meters .00100 PC_D25 percent coarse for 0-50 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D75 percent coarse for 50-100 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D125 percent coarse for 100-150 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D175 percent coarse for 150-200 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D225 percent coarse for 200-250 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D275 percent coarse for 250-300 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D325 percent coarse for 300-350 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D375 percent coarse for 350-400 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D425 percent coarse for 400-450 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D475 percent coarse for 450-500 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D525 percent coarse for 500-550 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D575 percent coarse for 550-600 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D625 percent coarse for 600-650 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D675 percent coarse for 650-700 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D725 percent coarse for 700-750 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D775 percent coarse for 750-800 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D825 percent coarse for 800-850 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D875 percent coarse for 850-900 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D925 percent coarse for 900-950 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D975 percent coarse for 950-1000 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1025 percent coarse for 1000-1050 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1075 percent coarse for 1050-1100 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1125 percent coarse for 1100-1150 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1175 percent coarse for 1150-1200 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1225 percent coarse for 1200-1250 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1275 percent coarse for 1250-1300 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1325 percent coarse for 1300-1350 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1375 percent coarse for 1350-1400 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1425 percent coarse for 1400-1450 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1475 percent coarse for 1450-1500 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1525 percent coarse for 1500-1550 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1575 percent coarse for 1550-1600 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1625 percent coarse for 1600-1650 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1675 percent coarse for 1650-1700 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1725 percent coarse for 1700-1750 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1775 percent coarse for 1750-1800 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1825 percent coarse for 1800-1850 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1875 percent coarse for 1850-1900 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1925 percent coarse for 1900-1950 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D1975 percent coarse for 1950-2000 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D2025 percent coarse for 2000-2050 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D2075 percent coarse for 2050-2100 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D2125 percent coarse for 2100-2150 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D2175 percent coarse for 2150-2200 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D2225 percent coarse for 2200-2250 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 PC_D2275 percent coarse for 2250-2300 feet (15 meters); label contains midpoint to depth of layer in feet dataset originator 0.00 100.00 percent .01 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 Digital, downloadable dataset containing percentage of coarse-grained deposits in Central Valley wells in 15 meter increments and percentage of coarse-grained deposits at CVHM Texture Model lattice points from Faunt (2009) for the computer 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. XLS Microsoft Excel 2007 0.001 http://water.usgs.gov/GIS/dsdl/pp1766_well-log-texture.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_well-log-texture FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998