Fred D Tillman 2015 Esri ASCII Raster Digital Data Set Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?ofr_2015_1160_hsg_daymet_resolution Fred D Tillman 2015 Publication (Other) Open-File Report 2015-1160 Reston, VA U.S. Geological Survey http://doi.org/10.3133/ofr20151160 hsg_UCRB_Daymet_resolution.txt is an Esri ASCII grid representing the hydrologic soil group (HSG) for the Upper Colorado River Basin. The HSG for an area is determined by the least water-transmitting layer in the soil column. The Natural Resources Conservation Service (NRCS) classifies four HSGs from Group A (high infiltration capacity and low overland flow potential) to Group D (low infiltration capacity and high overland flow potential). In Soil-Water Balance recharge simulations, a lookup table incorporates HSG and land-cover information for each grid cell to define unique runoff curve numbers, vegetation rooting depths, interception values, and maximum daily recharge values. The hsg_UCRB_Daymet_resolution.txt grid was developed as part of the investigation of changes in groundwater recharge in the Upper Colorado River Basin in response to potential climate change. This investigation uses the Soil-Water Balance model to estimate groundwater recharge. This project was supported by the USGS Groundwater Resources Program and the Bureau of Reclamation. The report documenting this and other datasets for the UCRB Soil-Water Balance recharge model is: Tillman, F.D, 2015, Documentation of input datasets for the soil-water balance groundwater recharge model of the Upper Colorado River Basin: U.S. Geological Survey Open-File Report 2015–1160, 17 p., http://doi.org/10.3133/ofr20151160. The control files, "UCRB_recharge_1950-99_MAURER.ctl", and "UCRB_recharge_1980-09_DAYMET.ctrl", plus the lookup table for landuse, "UCRB_LU_LOOKUP.txt" are included here as essential to completing the UCRB soils-water balance model. The control files are fully commented, and the lookup table is explained in great detail in the report, USGS OFR 2015-1160. They are located in a compressed file "ofr_2015_1160_ctl_lu_files.7z". 2015 publication date Complete None planned -113.920363928 -104.972961005 43.986766736 34.965779618 USGS Thesaurus inlandWaters groundwater groundwater recharge hydrologic soil group ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Metadata Identifier USGS:12633861-eef2-4cd1-a359-f44003f4b166 Geographic Names Information System Upper Colorado River Basin Arizona California Colorado Nevada New Mexico Utah Wyoming None. Please see 'Distribution Info' for details. None. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations. U.S. Geological Survey, Southwest Region Fred D Tillman Research Hydrologist mailing address

520 North Park Avenue

Tucson AZ 85719 520-670-6671 x223 520-670-5592 ftillman@usgs.gov https://water.usgs.gov/GIS/browse/hsg_daymet_resolution.jpg location of study area JPG Support for the development of the Soil-Water Balance Groundwater Recharge Model of the Upper Colorado River Basin was provided by the USGS Groundwater Resources Program and the Bureau of Reclamation. Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1 (Build 4959) Service Pack N/A (Build N/A) The hsg_UCRB_Daymet_resolution.txt ASCII grid combines information from gSSURGO (where available) and STATSGO2 datasets, which was then resampled to match the Daymet climate data resolution (1000m). Quality assurance was performed by project hydrologist by comparing resampled HSG dataset to original datasets. Data are complete. ASCII grid cellsize is 1000 meters. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable. Natural Resources Conservation Service (NRCS) 2015 Raster Digital Data Set Washington D.C. US Department of Agriculture http://datagateway.nrcs.usda.gov/ Digital and/or Hardcopy Resources 2015 publication date gSSURGO gSSURGO geodatabase raster of Hydrologic Soil Group for the Upper Colorado River Basin at 10 meter resolution Natural Resources Conservation Service (NRCS) 2015 Vector Digital Data Set Washington D.C. US Department of Agriculture http://datagateway.nrcs.usda.gov/ Digital and/or Hardcopy Resources 2015 publication date STATSGO2 STATSGO2 shapefile and tabular data for Hydrologic Soil Group for the Upper Colorado River Basin Environmental Systems Research Institute, Inc. ("Esri") 2012 software Redlands, CA Esri http://www.esri.com/ computer program 2012 publication date Esri geographic information system processing software, including "Mosaic to New Raster," "Extract by Mask," "CON," "Project Raster" Downloaded gSSURGO and STATSGO2 soil information for all five basin states from http://datagateway.nrcs.usda.gov/ 2015 The gSSURGO rasters were combined using the ArcGIS "mosaic to new raster" tool, and associated soil attribute tables were merged and joined to the combined raster. The combined gSSURGO raster was clipped to the UCRB study area using the ArcGIS "extract by mask" tool, and a separate Hydrologic Soil Group raster was created using the ArcGIS Reclass tool. 2015 STATSGO2 data were merged into a single shapefile. Reports on Water Features (for HSG) were run in Microsoft Access and exported to Microsoft Excel. In Excel, Visual Basic for Applications (VBA) scripts were written to compute the majority HSG value for each map unit. HSG results were joined to the polygon shapefile and a raster was created using the ArcGIS "feature to raster" tool, using the same resolution as the gSSURGO data. 2015 A merged raster of gSSURGO and STATSGO2 information was created for the HSG dataset using the CON tool, whereby gSSURGO information was used where available and STATSGO2 information was used where gSSURGO was missing. 2015 The HSG grid was resampled to obtain the same cell size, cell alignment, and geographic projection as the Daymet climate dataset using the ArcGIS "project raster" tool with the majority resampling technique, and the Daymet climate dataset raster to define the output cell size and "snap" raster. 2015 The final HSG raster was exported as an ASCII file. 2015 Raster Grid Cell 894 639 1 WGS 1984 Lambert Conformal Conic (ESRI Full Name: WGS_1984_Lambert_Conformal_Conic) 25.0 60.0 -100.0 42.5 0.0 0.0 row and column 1000.0 1000.0 m D_WGS_1984 WGS_1984 6378137.0 298.257223563 Attribute Table Table containing attribute information associated with the data set. Producer defined Value Hydrologic Soil Group for the Upper Colorado River Basin in Daymet Climate Data resolution (hsg_UCRB_Daymet_resolution.txt) U.S. Department of Agriculture, 1998, Soil Quality Resource Concerns, Available Water Capacity: Soil Quality Information Sheet, 2 p., available at http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_051279.pdf. 1 4 Count Unknown Producer defined 61387 315772 hsg_UCRB_Daymet_resolution.txt is an Esri ASCII grid representing the hydrologic soil group (HSG) for the Upper Colorado River Basin. The HSG for an area is determined by the least water-transmitting layer in the soil column. The Natural Resources Conservation Service (NRCS) classifies four HSGs from Group A (high infiltration capacity and low overland flow potential) to Group D (low infiltration capacity and high overland flow potential). In Soil-Water Balance recharge simulations, a lookup table incorporates HSG and land-cover information for each grid cell to define unique runoff curve numbers, vegetation rooting depths, interception values, and maximum daily recharge values. Tillman, F.D, 2015, Documentation of input datasets for the soil-water balance groundwater recharge model of the Upper Colorado River Basin: U.S. Geological Survey Open-File Report 2015–1160, 17 p., https://doi.org/10.3133/ofr20151160. U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov 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. Esri ASCII raster file raster data stored as a compressed ASCII file WinZip 0.121 https://water.usgs.gov/GIS/dsdl/ofr_2015_1160_hsg_daymet_resolution.zip The control files, "UCRB_recharge_1950-99_MAURER.ctl", and "UCRB_recharge_1980-09_DAYMET.ctrl", plus the lookup table for landuse, "UCRB_LU_LOOKUP.txt" are included here as essential to completing the UCRB soils-water balance model. The control files are fully commented, and the lookup table is explained in great detail in the report, USGS OFR 2015-1160. They are located in a compressed file "ofr_2015_1160_ctl_lu_files.zip". WinZip 0.034 https://water.usgs.gov/GIS/dsdl/ofr_2015_1160_ctl_lu_files.zip None. This dataset is provided by USGS as a public service. 20201117 U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998