Alan Rea Kenneth D. Skinner 2009 raster and vector digital data Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?ds412_archydrohucs Alan Rea Kenneth D. Skinner 2009 raster and vector digital data U.S. Geological Survey Data Series 412 Reston, Virginia U.S. Geological Survey https://pubs.usgs.gov/ds/412/ These datasets consist of a workspace (folder) containing a collection of gridded datasets plus a personal geodatabase containing several vector datasets. These datasets are designed to be used with the ArcHydro Tools, developed by ESRI in partnership with the U.S. Geological Survey, StreamStats Development Team. The datasets, together with the ArcHydro Tools, allow users to delineate watersheds and compute several watershed characteristics. The datasets are distributed in folders named for the 8-digit Hydrologic Unit Code (HUC) each covers. The data structure is the same for each HUC. These datasets were produced to support the StreamStats application, as well as to develop a model of perennial streams in Idaho. Each 8-digit HUC folder contains the following: Basic grids used by ArcHydro Tools: cat Catchment grid dem Digital elevation model, from NED, projected to IDTM83 projection, 10-meter resolution, elevations in centimeters fac Flow accumulation grid fac_global Global flow accumulation grid (includes cell counts from any upstream HUCs). Present only for HUCs downstream of others. fdr Flow direction grid lnk Stream link grid str Stream grid used to define catchments str900 Dense stream grid (900-cell threshold) used for display and to guide delineation Geodatabase feature classes used by ArcHydro Tools: Catchment Polygon version of cat grid AdjointCatchment Polygons representing aggregated catchments upstream of each non-headwater catchment DrainageLine ArcHydro drainage line feature class DrainagePoint ArcHydro drainage point feature class LongestFlowPathCat Longest flowpath in each catchment, computed by ArcHydro LongestFlowPathAdjCat Longest flowpath in each adjoint catchment, computed by ArcHydro Additional information about the above datasets and how they are used may be found in the help for the ArcHydro Tools. Parameter grids used to compute basin characteristics: bsldem10m Slope grid based on 10-meter resolution DEM nfsl30 Grid of cells having slopes greater than or equal to 30 percent and that are north-facing (aspects less than 60 and greater than 300 degrees). Value 1 if true, 0 if false. slop30 Grid of cells having slopes greater than or equal to 30 percent. Value 1 if true, 0 if false. Continuous parameter grids of basin characteristics: bsld10_cpg Average upstream basin slope for every cell, based on a 10-m DEM elev_cpg Average upstream basin elevation for every cell, in feet forest_cpg Average upstream forested area for every cell, in percent of area nfsl30_cpg Average for every cell of upstream percent of cells having slopes greater than or equal to 30 percent and that are north-facing (aspects less than 60 and greater than 300 degrees) precip_cpg Average upstream basin mean annual precipitation for every cell, in tenths of an inch slop30_cpg Average for every cell of upstream basin percent of cells having slopes greater than or equal to 30 percent For a description of the development of continuous parameter grids, see the text of USGS Data Series Report DS412. An appendix contains the Arc Macro Language code used to compute these grids. 2009 publication date Complete None planned -120.686373 -108.421923 49.858931 39.651369 USGS Thesaurus inlandWaters streamflow statistics streamstats forest land cover slope elevation aspect precipitation ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Metadata Identifier USGS:e1724ac4-5aaa-49ef-9ba8-f4a0a96046dd GCMD Location Keywords NORTH AMERICA UNITED STATES UNITED STATES OF AMERICA Idaho ID None None U.S. Geological Survey Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) h2oteam@usgs.gov Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.4.1420 The data were less carefully processed and checked in the areas extending outside of Idaho. The available data were used for these areas without much additional checking or quality control. Complete for all of Idaho. Extends beyond Idaho, usually encompassing full 8-digit HUCs that are wholly or partially in Idaho. Data are cut off at the border with Canada. Results for watersheds extending into Canada are not reliable. U.S. Geological Survey 2004 raster digital data Sioux Falls, SD U.S. Geological Survey http://ned.usgs.gov/ 24000 disc 2004 publication date 1/3-second NED Elevation grid (approximately 10-meter resolution, resampled to 10 meters when projected). Note NED is updated regularly, and may contain different data now than when these data were retrieved in 2004. U.S. Geological Survey U.S. Environmental Protection Agency USDA Forest Service Other Federal, State and local partners 2004 vector digital data http://nhd.usgs.gov/ 24000 disc 2004 publication date High-Resolution NHD Hydrography used to burn into elevation model. Note; NHD is updated regularly, and may contain different data now than when these data were retrieved in 2004. Idaho Department of Water Resources and others Unpublished Material 200506 vector digital data http://www.idwr.idaho.gov/watersheds/default.htm 24000 disc 200506 publication date Idaho 2005 Draft WBD The 8-digit HUC boundaries were used as "walls" around processing units. Note; some of the boundaries have been changed since this snapshot was taken in 2005. U.S. Geological Survey U.S. Environmental Protection Agency U.S. Forest Service National Oceanic and Atmospheric Administration 2001 1992 raster digital data http://landcover.usgs.gov/natllandcover.php disc 1990 1995 ground condition NLCD92 Land cover (forested categories only) Myron Molnau Cindy Newton 1995 map http://snow.ag.uidaho.edu/Climate/reports.html 1000000 online 1961 1990 ground condition id_precip Mean annual precipitation within Idaho C. Daly G. Taylor 1998 raster digital data Portland, OR Water and Climate Center of the National Resources Conservation Service grid-cell resolution 4 km http://www.ocs.orst.edu/prism/prism_new.html online 1961 1990 ground condition prism_precip Mean annual precipitation outside of Idaho Development of Hydro-Enforced DEMs. See USGS Data Series Report DS412 for complete process description. 1/3 arc-second NED High-resolution NHD Idaho 2005 Draft WBD 2007 HydroDEM Terrain Preprocessing steps in ArcHydro Tools were performed. Stream definition threshold used was 150,000 cells. HydroDEM 200710 ArcHydroHUCs The precipitation grids were combined to cover the whole study area, since id_precip covered only Idaho. The prism_precip and molnau grids were projected to IDTM projection (with old parameters but on NAD83), and resampled to 500-m grid-cell resolution. They were combined with the ESRI Grid Merge function. Later the precip_combo grid was projected to the new IDTM83 projection, which added some large X, Y offsets, but otherwise is the same projection. id_precip prism_precip 20000707 precip_combo precip_prj The FOREST grid was created from the NLCD92 land cover data. The appended NLCD92 data were acquired from Naomi Nakagaki (USGS California Water Science Center). The grid was reclassified to a grid having cell value 1 for every cell in the forest category (values 41-43 in NLCD92), and having cell value 0 everywhere else. NLCD92 20030212 forestg Continuous parameter grids were computed for six basin characteristics. The process is described in detail in the text of USGS Data Series Report DS412. The Arc Macro Language (AML) program used to do the processing is included in an Appendix. precip_prj forestg 1/3 arc-second NED 2008 bsld10_cpg elev_cpg forest_cpg nfsl30_cpg precip_cpg slop30_cpg Transverse Mercator 0.999600 -114.000000 42.000000 2500000.000000 1200000.000000 row and column 10 10 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical

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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. AHW 9.2 ESRI ArcHydro Workspace 25,666 MB https://water.usgs.gov/GIS/dsdl/ds412/index.html None. This dataset is provided by USGS as a public service. 20201117 U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical

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