Michael E. Wieczorek Andrew E. LaMotte 2010 tabular digital data Digital Data Series DS-491-03 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?mrb_e2rf1_bchar This tabular data set represents basin characteristics for the year 2002 compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). These characteristics are reach catchment shape index, stream density, sinuosity, mean elevation, mean slope and number of road-stream crossings. The source data sets are based on a modified version of the U.S. Environmental Protection Agency's (USEPA) RF1_2 and include enhancements to support national and regional-scale surface-water quality modeling (Nolan and others, 2002; Brakebill and others, 2011) and the U.S. Census Bureau's TIGER/Line Files (U.S. Census Bureau,2006). The MRB_E2RF1 catchments are based on a modified version of the U.S. Environmental Protection Agency's (USEPA) ERF1_2 and include enhancements to support national and regional-scale surface-water quality modeling (Nolan and others, 2002; Brakebill and others, 2011). Data were compiled for every MRB_E2RF1 catchment for the conterminous United States covering New England and Mid-Atlantic (MRB1), South Atlantic-Gulf and Tennessee (MRB2), the Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy (MRB3), the Missouri (MRB4), the Lower Mississippi, Arkansas-White-Red, and Texas-Gulf (MRB5), the Rio Grande, Colorado, and the Great basin (MRB6), the Pacific Northwest (MRB7) river basins, and California (MRB8). This tabular data set was created and used by the U.S. Geological Survey (USGS) specifically to estimate basin characteristics per watershed segment in the application of the national SPAtially Referenced Regression On Watershed attributes (SPARROW) model . The SPARROW model relates in-stream water-quality measurements to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and stream transport. The model empirically estimates the origin and fate of contaminants in streams, and quantifies uncertainties in these estimates based on model coefficient error and unexplained variability in the observed data. For more information on the USGS SPARROW model please refer to: <http://water.usgs.gov/nawqa/sparrow/intro/intro.html.> 2002 publication date Complete None planned -127.910792 -65.327751 51.657387 23.243486 None Basin characteristics Inlandwaters MRB_E2RF1 MRB_E2RF1WS Catchment NAWQA SPARROW None Conterminous United States MRB Major River Basins MRB1 NEMA New England and Mid-Atlantic MRB2 SAGT South Atlantic-Gulf and Tennessee MRB3 GLMR Great Lakes, Ohio, Upper Mississippi, and Souris-Red-Rainy MRB4 MORI Missouri MRB5 LMTG Lower Mississippi, Arkansas-White-Red, and Texas-Gulf MRB6 COGB Rio Grande, Colorado, and Great Basin MRB7 PANW Pacific Northwest MRB8 CALI California None None Michael E. Wieczorek U.S. Geological Survey mailing address

5522 Research Park Drive

Baltimore MD 21228 USA 443-498-5550 443-498-5510 mewieczo@usgs.gov http://water.usgs.gov/GIS/browse/mrb_e2rf1_bchar.jpg Example illlustration of data set JPG Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 Charles G. Crawford Pixie A. Hamilton Anne B. Hoos October 5, 2006 Reston, Virginia U.S. Geological Survey Prepared by Charlie Crawford, Pixie Hamilton, and Anne Hoos for a NAWQA National Liaison Meeting, Washington D.C., October 5, 2006. http://water.usgs.gov/nawqa/studies/mrb/mrb_factsheet.pdf The values were verified by reviewers. Complete. Jacqueline V. Nolan John W. Brakebill Richard B. Alexander Gregory E. Schwarz Febuary 22, 2002 vector digital data USGS Open-File Report USGS Open-File Report 02-40 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?erf1_2 online 2002 publication date ERF1_2 The modified version of the source data provided a reach network to construct reach catchments for MRBs and subsequent processing (J.W. Brakebill, U.S. Geological Survey, written commun., 2008). John W. Brakebill Silvia E. Terziotti 20110222 vector digital data General Information Web Only Baltimore, MD U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?mrb_e2rf1 online 2011 publication date MRB_E2RF1 The source data provided a reach network to construct reach catchments for MRBs and subsequent processing. John W. Brakebill Silvia E. Terziotti 20110222 raster digital data General Information Web Only Baltimore, MD U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?mrb_e2rf1ws online 2011 publication date MRB_E2RF1WS The source data provided reach catchments for MRBs and subsequent processing. U.S. Census Bureau 2006 Second edition vector digital data http://www.census.gov/geo/www/tiger online 2000 publication date TIGER The source data provided information on roads. Stream density was calculated by taking the reach length (in meters) and dividing it by catchment area ( in square meters) ( John Brakebill, U.S. Geological Survey, written commun., 2008). Sinuosity was calculated by taking the reach length (in meters) and dividing it by its straight line length (in meters). Straight line length is measured from the beginning node of a reach to the end node of the reach. Mean reach catchment elevation was calculated with the following steps: 1) Acquired elevation data in 100-meter format from USGS ( John Brakebill, U.S. Geological Survey, written commun., 2008). 2) Summarized the mean elevation by catchment using the ZONALMEAN command in GRID. 3) Exported results into a dbf file format. Mean slope in percent and degrees was calculated with the following steps: 1) Aquired elevation data in 100-meter format from USGS ( John Brakebill, U.S. Geological Survey, written commun., 2008). 2) Used the SLOPE command in GRID to calculate slope in both degrees and percent 3) Summarized the mean slope by catchment using the ZONALMEAN command in GRID. 4) Exported results into a dbf file format. Number of road crossings per reach was calculated by intersecting the road coverage with the modified RF1 stream coverage and summing the intersections. BSI was calculated by dividing the catchment area (square meters) by the catchment perimeter (meters) squared ( James Falcone, U.S. Geological Survey, written commun., 2007). 2008 Metadata imported. T:\MRB\meta\RF1\xml\bchar_rf1.xml 20100823 16132200 bchar_rf1 dbf tabular data ESRI OID Internal feature number ESRI Sequential unique whole numbers that are automatically generated RF1ID Unique ID to relate to the item MRB_ID in the MRB_E2RF1WS catchment and MRB_E2RF1 reach coverages. U.S. Geological Survey Sequential unique whole numbers that are automatically generated BSI Catchment area divided by catchment perimeter squared U.S. Geological Survey 0 1 STRM_DENS Reach length divided by catchment area U.S. Geological Survey 0 1 SINUOSITY Reach length divided by straight line length (straight line from beginning node to end node of reach) U.S. Geological Survey 0 100 ELEVCM_MEA Mean elevation in meters U.S. Geological Survey 0 6504 meters SLP_DEG Mean slope in degrees U.S. Geological Survey 0 90 degrees SLP_PERC Mean slope in percent rise U.S. Geological Survey 0 180 percent RD_FRQ Number of road-stream crossings per catchment U.S. Geological Survey 0 135 percent U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

455 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html 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 these 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. dbf Full coverage zipped 71 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb1.zip dbf Full coverage zipped 194 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb2.zip dbf Full coverage zipped 322 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb3.zip dbf Full coverage zipped 285 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb4.zip dbf Full coverage zipped 176 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb5.zip dbf Full coverage zipped 72 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb6.zip dbf Full coverage zipped 292 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb7.zip dbf Full coverage zipped 35 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_bchar_mrb8.zip None. This dataset is provided by the USGS as a public service. 20100817 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+mrb_e2rf1_bchar FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998