Glockhoff, Carolyn Stamos, Christina L. 2009 vector digital data Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?cont2008 During 2008, the U.S. Geological Survey and other agencies made approximately 2,500 water-level measurements in the Mojave River and Morongo groundwater basins. These data document recent conditions and, when compared with previous data, changes in groundwater levels. A water-level contour map was drawn using data from about 700 wells, providing coverage for most of the basins. Twenty-four hydrographs show long-term (up to 70 years) water-level conditions throughout the basins, and 9 short-term (1997 to 2008) hydrographs show the effects of recharge and discharge along the Mojave River. In addition, a water-level-change map was compiled to compare 2006 and 2008 water levels throughout the basins. (575 wells) This data set is a digital representation of the 2008 contours presented on the map published by Stamos, C.L., McPherson, K.R., Sneed, Michelle, and Brandt, J.T., Water-level and land-subsidence studies in the Mojave River and the Morongo Groundwater Basins (2008), Southwestern Mojave Desert, California, U.S. Geological Survey SIR 2007-5097, unpaginated. [Available on the World Wide Web at http://pubs.usgs.gov/sir20075097]. This report, first published in 2007, was updated to include data for 2008. The Mojave River and the Morongo Groundwater Basins are in the Mojave Desert region. The rapid growth in population in these basins, which is due, in part, to their proximity to Los Angeles, has increased the demand for water. Increased pumping to meet the needs of an increasing resident population has resulted in groundwater overdraft in parts of the groundwater basin (Stamos & others 2007). 2008 ground condition Complete None planned -117.660855 -116.052529 35.072016 34.120490 ISO 19115 Topic Category inlandWaters inland waters water table water level contours drainage basin ground water ground-water groundwater hydrology levels USGS none Morongo Mojave Desert Southern California California San Bernardino County None These data should not be used at scales larger than 1:100,000. Acknowledgment of the U.S. Geological Survey and Mojave Water Agency would be appreciated in products derived from these data. U.S. Geological Survey Steven K. Predmore Geographer mailing address

4165 Spruance Road, Suite 200

San Diego CA 92101 USA 1-888-275-8747 (1-888-ASK-USGS) spredmor@usgs.gov http://water.usgs.gov/GIS/browse/contours2008.png Ground water contours 2008 PNG Compilation of this data set and the associated metadata was done in cooperation with the Mojave Water Agency. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770 Chain-node topology present. This data set includes all the 2008 water-table elevation contours published on SIR 2007-5097. Contour lines initially were hand drawn based on well data, then digitized in ArcMap, then smoothed by moving vertices until the desired line shape was achieved. To keep down the size of the line file, "simplify line" was used. The resulting contour lines were exported as a png file (included in the downloadable zipped file set). The png file was georefernced for the Google map and used for the plate. 2008 The contours were edited to add the Line_type field and the wlevell field. 2008 Metadata imported. mojavemetadata2008.txt 20090413 11055400 Vector String 79 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000001 0.000001 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 National Geodetic Vertical Datum of 1988 25 feet Attribute values Cont2008 Shapefile Attribute Table ESRI FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Id automatically generated ESRI automatically generated wlevel water level in feet above sea level author wlevel water level from field measurement, in feet line_type solid or hatchured line author solid contour line between equal elevations of groundwater author hatch hatchured line connecting equal groundwater elevations around an enclosed basin author 25' hatch = enclosed basin U.S. Geological Survey Ask USGS - Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although this data set has 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 and related materials. 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 this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S Government. How To Get the Data ESRI Shapefile. ESRI Shapefile and png image file unzip. 198KB http://water.usgs.gov/GIS/dsdl/sir07-5097_Cont2008.zip None. This dataset is provided by USGS as a public service. 20090820 Kelly R. McPherson U.S. Geological Survey Geographer mailing address

Placer Hall, 6000 J Street

Sacramento CA 95819 1-888-275-8747 (1-888-ASK-USGS) (916) 278-3169 http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+cont2008 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998