Toby L. Welborn Michael T. Moreo 2007 vector digital data Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ds273_DelineatedIrrigatedAcreage_Geodatabase Carson City, NV 2007 Data Series DS-273 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/ds/2007/273/ Accurate delineations of irrigated acreage are critical in the development of water-use estimates and in determining an accurate water budget for the hydrographic basins of the BARCAS study area. Currently, irrigated acreage is estimated routinely for only a few basins in the study area and these acreages are calculated and reported by township range section, quarter, and quarter-quarter. Satellite imagery from the Landsat Thematic Mapper (TM) platform was used to delineate irrigated acreage for the BARCAS study area on a field by field basis. Six hundred and forty-three fields were delineated by interpreting satellite data. The water source, irrigation system, crop type, and field activity were identified and verified through field reconnaissance. These data were integrated into the geodatabase and analyzed to develop reasonably accurate estimates of irrigated acreage for the 2000, 2002, and 2005 growing seasons by hydrographic area and sub-area. Estimated average annual potential evapotranspiration and average annual precipitation were incorporated into the geodatabase as ancillary data. Irrigated acreage in 2005 totaled nearly 32,000 acres ranging from less than 200 acres in Butte, Cave, Jakes, Long, and Tippett Valleys to 9,200 acres in Snake Valley. Cave, Irrigated acreage increased about 20 percent from 2000 to 2005, with Snake and White River Valleys experiencing the greatest increases. The source for about 80 percent of irrigation water applied during drier years is ground water pumped from wells. About 80 percent of irrigation water applied in 2005 was through sprinkler systems, and about 20 percent was through flood systems. Fields planted in alfalfa accounted for about 88 percent of the irrigated acreage. The intended uses of this data set include, but are not limited to, natural resource modeling, mapping, and visualization applications. 2000 2002 2007 ground condition Complete None planned -116.034926 -113.676000 40.302025 37.987253 agriculture Agriculture Irrigation Inland waters inlandWaters Southwest United States Nevada Utah Little Smoky Valley Newark Valley Long Valley Butte Valley Jakes Valley White River Valley Steptoe Valley Cave Valley Lake Valley Spring Valley Tippett Valley Snake Valley Geospatial Data Geodatabase None Although this Federal Geographic Data Committee (FGDC) compliant metadata file is intended to document the data set in nonproprietary form, as well as ArcGIS format, this metadata file may include some ArcGIS-specific terminology. These data are not intended to be used as a survey product and are for reference purposes only. U.S. Geological Survey Public Information Officer mailing and physical address

2730 N. Deer Run Rd.

Carson City Nevada 89701 United States of America (775) 887-7600 (775) 887-7629 GS-W-NVpublic-info@usgs.gov Acknowledgment of the U.S. Geological Survey and the Bureau of Land Management would be appreciated in products derived from these data. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 Alan H. Welch Daniel J. Bright 2007 document Open-File Report 2007-1156 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/ofr20071156 See individual feature class metadata. Complete Geodatabase metadata overview. See Individual feature classes for feature class process steps. 20070821 Vector Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.002687 0.002687 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Irrigation_WaterUse Feature Data Set ESRI Ag_Irrigation Polygon Feature Class ESRI Crop Inventory Polygon Feature Class ESRI IrrigationFieldCheck Point Feature Class ESRI StateWell_Databases Feature Data Set ESRI NV_StateWellLog Point Feature Class ESRI Utah_POD Point Feature Class ESRI HA_StudyArea Polygon Feature Class ESRI rel_Ag_Irrigation_tbl_Irr_2005 Relationship ESRI rel_Ag_Irrigation_tbl_Zonal_Mean Relationship ESRI rel_CropInventory_tbl_CropInventory Relationship ESRI tbl_CropInventory Table ESRI tbl_Irr_2005 Table ESRI tbl_Zonal_Mean Table ESRI U.S. Geological Survey Ask USGS Water Webserver Team mailing and physical address

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html 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. 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. Geodatabase 9.2 Geodatabase Spatial and attribute information WinZip http://water.usgs.gov/GIS/dsdl/DS273_IrrigatedAcreage.zip Shapefile 2007 Spatial and attribute information WinZip http://water.usgs.gov/GIS/dsdl/DS273_IrrigatedAcreage_Shape.zip None. This dataset is provided by USGS as a public service. 20051026 20070706 U.S. Geological Survey REQUIRED: The person responsible for the metadata information. Ask USGS -- Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds273_DelineatedIrrigatedAcreage FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998