Smith, Gregory A. Stamos, Christina L. Glockhoff, Carolyn S.. House, Sally F. Clark, Dennis A. 2011 vector digital data Scientific Investigations Report 2011-5234 Sacramento, California U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?cont2010 Stamos, Christina L. McPherson, Kelly R. Sneed, Michelle Brandt, J.T. 2007 document Scientific Investigations Report 2007-5097 Sacramento, California U.S. Geological Survey http://pubs.water.usgs.gov/sir20075097 During 2010, 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 610 wells, providing coverage for most of the basins. Twenty-eight hydrographs show long-term (up to 70 years) water-level conditions throughout the basins, and 9 short-term (1997 to 2010) hydrographs show the effects of recharge and discharge along the Mojave River. In addition, a water-level-change map was compiled to compare 2008 and 2010 water levels throughout the basins. (513 wells) This data set is a digital representation of the 2010 contours presented on the map published by Smith, G.A., Stamos, C.L., Glockhoff, C.S., House, S.F., and Clark, D.A., Water-level and land-subsidence studies in the Mojave River and the Morongo Groundwater Basins (2010), Southwestern Mojave Desert, California, U.S. Geological Survey SIR 2011-5234, unpaginated. [Available on the World Wide Web at http://pubs.usgs.gov/sir20115234]. This report, first published in 2007, included data for 1992 to 2008(SIR 2007-5097). 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). 2010 publication date Complete None planned -117.659109 -115.983688 35.025492 34.107567 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 Christina L. Stamos Hydrologist mailing address

4165 Spruance Road, Suite 200

San Diego CA 92101 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/GIS/browse/contours2010.png Mojave Groundwater Contours 2010 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 9.3.1.3500 Chain-node topology present. This data set includes all the 2010 water-table elevation contours published in SIR 2011-5234. Contour lines were created by digitizing a line in ArcMap, based on well data, and made into a plate. The plate image was imported back into ArcMap, smoothing the lines and moving vertices until the desired line shape was achieved. To reduce the size of the line file, simplify line was used. The resulting contour lines were exported as a png image file with transparent background. The png file was georeferenced for the Google map. 2010 The contours were edited to add the Line_type field and the wlevell field. 2010 Metadata imported. mojavemetadata2010.txt 20120316 11091200 Vector String 175 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000256 0.000256 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 National Geodetic Vertical Datum of 1988 25 feet Attribute values Cont2010 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 Irregular line_type solid, dashed, or hatchured line author solid solid contour line between equal elevations of groundwater author dashed Dashed contour line on map (contour approximately located). author hachure 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 address

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+cont2010 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/sir2011-5234_cont2010.zip None. This dataset is provided by USGS as a public service. 20120316 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998