Faunt, Claudia C. 2012 vector digital data Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?pp1766_ZONE 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 defines the model grid, active cells in model layers 2 and 3, and geologic province arrays of the ZONE package used 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). This simulation 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 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. 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 ZONE Package includes the Corcoran Clay Member of the Tulare Formation, bedrock, and other geologic provinces of the 10 layers of the CVHM. In addition, the active cells in model layers 2 and 3 are identified. 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 active cells in model layers 2 and 3, and geologic province arrays of the 10 model layers are components of the ZONE package of MODFLOW-FMP, the USGS 3-dimensional finite-difference code used to simulate flow in the CVHM. The one-square-mile cells were used to define the resolution and extent of the CVHM. In the flow simulation, the ZONE package values are used to define the geologic provinces that augment the hydraulic properties for 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 CVHM ZONE package 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 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 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 -123.831528 -117.916328 40.748631 34.519871 ISO 19115 Topic Category inlandWaters geoscientificinformatioN American Geological Institute Glossary of Geology (http://glossary.agiweb.org/dbtw-wpd/glossary/search.aspx) hydrology hydrogeology model groundwater geologic province None Central Valley Aquifer Central Valley Hydrologic Model Flow Model CVHM Texture Model CV-RASA Groundwater Availability of the Central Valley Aquifer grid discretization 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 Projects Office

4165 Spruance Road, Suite 200

San Diego California 92101 USA (619) 225-6142 (619) 225-6101 ccfaunt@usgs.gov http://water.usgs.gov/GIS/browse/pp1766_ZONE.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 Harbaugh, Arlen W. Banta, Edward R. Hill, Mary C. McDonald, Michael G. 2000 Open-File Report 2000-92 Reston, VA U.S. Geological Survey http://water.usgs.gov/nrp/gwsoftware/modflow2000/ofr00-92.pdf 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/ Weissmann, G.S. Bennett, G. Lansdale, A.L. 2005 Special Publications 251 London, England, UK Geological Society of London http://epswww.unm.edu/facstaff/weissman/GSW_website/pubs/SP251-169-2006.pdf 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. The one-square-mile cells were used to define the resolution and extent of the CVHM. There are no overlapping or duplicate grid cells. The polygon features in this dataset are computer-generated and represent the model grid and model layers of the Central Valley Hydrologic Model. 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 maps in the region by using a GIS system. Faunt, C. C. Hanson, R.T. Belitz, K. Schmid, W. Predmore, S.P. Rewis, D.L. McPherson, K. 2009 document U.S. Geological Survey Professional Paper 2009-1766 Reston, Virginia U.S. Geological Survey http://pubs.usgs.gov/pp/1766/PP_1766.pdf 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) model grid Faunt, Claudia C. Belitz, Kenneth Hanson, Randall T. 2010 Hydrogeology Journal Volume 18, Number 3 (2010) Berlin, Germany & Heidelberg, Germany Springer-Verlag http://www.springerlink.com/content/5q5736403v144648/ online 2009 publication date Faunt and others (2010) coarse- and fine-grained texture analysis Williamson, A. K. Prudic, D. E. Swain, L. A. 1989 Professional Paper 1401-D Reston, VA U.S. Geological Survey http://pubs.usgs.gov/pp/1401d/report.pdf online 2009 publication date Williamson and others (1989) Central Valley Regional Aquifer System Analysis (CV-RASA) model A GIS was used to develop a polygon file representing the flow-model grid. The grid is comprised of 441 rows and 98 columns. 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). A cell number (CELLNUM) was added representing an ID, starting from the upper left cell and wrapping left to right, top to bottom. The ZONE Package includes attributes representing the geologic units in each model layer (the Corcoran Clay Member of the Tulare Formation, bedrock, and other geologic provinces of the 10 layers of the CVHM). This geologic information was interpolated from the source data. In addition, the active cells in model layers 2 and 3 are identified (Faunt, 2009). Faunt (2009) 20090420 10482600 Faunt and others (2009) 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 43218 Albers Conical Equal Area 29.500000 45.500000 -120.000000 23.000000 0.000000 0.000000 coordinate pair 1609 1609 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 0.000010 feet Explicit elevation coordinate included with horizontal coordinates ZONE Zones (ZONE) - Defines arrays of different zones. Parameters may be composed of one or many zones (Harbaugh and others, 2000) dataset originator FID Internal feature number. ESRI 0 bedrock or inactive dataset originator Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI 0 bedrock or inactive dataset originator Coordinates defining the features. OBJECTID Internal feature number. ESRI 0 bedrock or inactive 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 Sequential unique whole numbers that are automatically generated. ROW Hydrologic model grid row number, starting in the north and increasing to the south dataset originator 0 bedrock or inactive dataset originator COLUMN_ Hydrologic model grid column number, starting on westside and increasing to the east. dataset originator 1 98 Integer l1zoneqpc Layer1, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 75 QPc Metadata author l2zoneqpc Layer2, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 75 QPc Metadata author 98 layers 4 and 5 where the Corcoran Clay does not exist Metadata author 99 upper layer of bedrock Metadata author l3zoneqpc Layer3, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin (Stockton) Metadata author 21 area 21 - Southwest San Joaquin (Westlands) Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 75 QPc Metadata author 81 San Joaquin Metadata author 99 upper layer of bedrock Metadata author l4zone Layer4, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 51 Corcoran exists and < 10 ft thick (87 cells) Metadata author 52 Corcoran clay exists and between 10 and 20 ft thick (1072 cells) Metadata author 53 Corcoran clay exists and > 20 ft thick and deeper than 30 ft from landsurface Metadata author 98 layers 4 and 5 where the Corcoran Clay does not exist Metadata author l5zone Layer5, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 51 Corcoran exists and < 10 ft thick (87 cells) Metadata author 52 Corcoran clay exists and between 10 and 20 ft thick (1072 cells) Metadata author 53 Corcoran clay exists and > 20 ft thick and deeper than 30 ft from landsurface Metadata author 98 layers 4 and 5 where the Corcoran Clay does not exist Metadata author l6zoneqpc Layer6, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin (Westlands) Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 60 below corcoran Metadata author 75 QPc Metadata author 81 San Joaquin Metadata author 99 upper layer of bedrock Metadata author l7zoneqpc Layer7, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin (Westlands) Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 60 below corcoran Metadata author 75 QPc Metadata author 81 San Joaquin Metadata author 99 upper layer of bedrock Metadata author l8zoneqpc Layer8, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin (Westlands) Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 60 below corcoran Metadata author 75 QPc Metadata author 81 San Joaquin Metadata author 99 upper layer of bedrock Metadata author l9zoneqpc Layer9, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin (Westlands) Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 60 below corcoran Metadata author 75 QPc Metadata author 81 San Joaquin Metadata author 99 upper layer of bedrock Metadata author l10zoneqpc Layer10, QPC zone. Zones used to assign permeability based on geologic units. dataset originator 0 bedrock or inactive dataset originator 10 area 10 - Redding Metadata author 11 area 11 - Western Sacramento Metadata author 12 area 12 - Eastern Sacramento Metadata author 20 area 20 - Northwest San Joaquin Metadata author 21 area 21 - Southwest San Joaquin (Westlands) Metadata author 22 area 22 - Northeast San Joaquin Metadata author 23 area 23 - East Central San Joaquin Metadata author 24 area 24 - Southeast San Joaquin Metadata author 30 area 30 - Tulare Metadata author 60 below corcoran Metadata author 75 QPc Metadata author 81 San Joaquin Metadata author 99 upper layer of bedrock Metadata author lay2_act Active Cells dataset originator 0 bedrock or inactive dataset originator 1 Active Metadata author 2 Active Metadata author 98 layers 4 and 5 where the Corcoran Clay does not exist Metadata author lay3_act Active Cells dataset originator 0 bedrock or inactive dataset originator 1 Active dataset originator 2 Active dataset originator Each model-grid polygon-feature has 18 attributes. Three attributes are automatically generated by the GIS (FID, OBJECTID, and Shape) for internal software purposes. The remaining attributes were assigned by the author (dataset originator) to define the 10 zones that are used to augment the hydraulic properties for the CVHM. These zones were then used to assign permeability. 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 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 unzip 5.605 http://water.usgs.gov/GIS/dsdl/pp1766_ZONE.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_ZONE FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998