ltl nru eX' 1506-00055 Hydrogeology and Simulated Effects of Urban Development on Water Resources of Spanish Springs Valley, Washoe County, West-Central Nevada U.S. GEOLOGICAL SURVEY Water- Resou rces I nvestigations Repo ft 96-4297 Prepared in cooperation with the NEVADA DIVISION OF WATER RESOURCES 1506-00055 Northeastward photographic views of irrigated lands in southern part of Spanish Springs Valley in (A) 1967 and (B) 1996. Orr Ditch is in foreground. Trailer park seen at left in 1967 view is hidden by trees thirty years later. ln 1996, urban development in the form of a subdivision coexists with irrigated lands. Hydrogeology and Simulated Effects of Urban Development on Water Resources of Spanish Springs Valley, Washoe County, West-Central Nevada By David L. Berger, Wyn C. Ross, Carl E. Thodal, and Armando R. Robledo U.S. GEOLOGICAL SURVEY Wate r- Reso u rces I nvesti gatio ns Report 96- 4297 Prepared in cooperation with the NEVADA DIVISION OF WATER RESOURCES Carson City, Nevada 1997 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY GORDON P. EATON, Director Any use of trade names in this publication is for descriptive purposes only and does not constitute endorsement by the U.S. Government For additional information Copies of this report can be write to: purchased from: District Chief U.S. Geological Survey U.S. Geological Survey Branch of Information Services 333 West Nye Lane, Room 203 Box 25286 Carson City, NV 89706-0866 Denver. CO 80225-0286 email :
[email protected] CONTENTS Abstract....... Location and General Features of Study Area ...........