Michael E. Wieczorek Andrew E. LaMotte 2010 tabular digital data Digital Data Series DS-491-06 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?mrb_e2rf1_canopy This tabular data set represents the mean percent tree canopy from the Canopy Layer of the National Land Cover Dataset 2001 (LaMotte and Wieczorek, 2010), compiled for every MRB_E2RF1 catchment of Major River Basins (MRBs, Crawford and others, 2006). The source data set represents tree canopy percentage for the conterminous United States for 2001. The Canopy Layer of the National Land Cover Data Set for 2001 was produced through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium. The MRLC Consortium is a partnership of Federal agencies (http://www.mrlc.gov), consisting of the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), the U.S. Environmental Protection Agency (USEPA), the U.S. Department of Agriculture (USDA), the U.S. Forest Service (USFS), the National Park Service (NPS), the U.S. Fish and Wildlife Service (USFWS), the Bureau of Land Management (BLM), and the USDA Natural Resources Conservation Service (NRCS). 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 mean percentage of tree canopy for 2001 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. 2001 publication date Complete None planned -127.910792 -65.327751 51.657387 23.243486 None Tree canopy 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_canopy.jpg 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 of the items were verified for computational accuracy by the author and 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. LaMotte, Andrew E. Wieczorek, Michael E. 2010 raster digital data In Review In Review Reston, VA U.S. Geological Survey online 2001 ground condition NLCD01 The source data provided information on land cover. LaMotte, Andrew E. Wieczorek, Michael E. 2010 raster digital data In Review In Review Reston, VA U.S. Geological Survey online 2001 ground condition NLCD01 The source data provided information on land cover. LaMotte, Andrew E. Wieczorek, Michael E. 2010 raster digital data In Review In Review Reston, VA U.S. Geological Survey online 2001 ground condition NLCD01 The source data provided information on land cover. LaMotte, Andrew E. Wieczorek, Michael E. 2010 raster digital data In Review In Review Reston, VA U.S. Geological Survey online 2001 ground condition NLCD01 The source data provided information on land cover. 1) Acquired tree canopy GRID tiles from USGS. 2) Resampled the MRB_E2RF1 catchment grids to 30-meter to match the resolution of the canopy grid. 3) Summarized percent canopy by catchment using the ZONALMEAN command in GRID. 4) Exported results into a dbf file format. 2008 canopy_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 CNPY_MEAN Estimated mean percent tree canopy of catchment U.S. Geological Survey 0.0 93.6 Percentage CNPY_AREA Area of catchment that the source GRID covers U.S. Geological Survey 0.0 136674600000.0 Square meters BASIN_AREA Total area of catchment U.S. Geological Survey 900.0 206651100000.0 Square meters NODATA_ARE Area of catchment that the source GRID does not cover U.S. Geological Survey 0.0 150175100000.0 Square meters COV_PERC Percentage of catchment that the source GRID covers U.S. Geological Survey 0.0 100.0 Percentage 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 dataset 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 61 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb1.zip dbf Full coverage zipped 121 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb2.zip dbf Full coverage zipped 153 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb3.zip dbf Full coverage zipped 157 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb4.zip dbf Full coverage zipped 109 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb5.zip dbf Full coverage zipped 70 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb6.zip dbf Full coverage zipped 152 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_mrb7.zip dbf Full coverage zipped 33 KB http://water.usgs.gov/GIS/dsdl/mrb_e2rf1_canopy_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_canopy FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998