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Estimates of subsurface tile drainage extent for the conterminous United States, early 1990s


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Nakagaki, N., Wieczorek, M.E., and Qi, S.L., 2016, Estimates of subsurface tile drainage extent for the conterminous United States, early 1990s: U.S. Geological Survey data release,


This dataset is a 30-meter resolution national-scale raster of estimated subsurface tile drainage extent based on early 1990s county areas of subsurface tile drains and geospatial datasets of cropland and poorly drained soil. Specifically, it was developed using 1) county-level acres of subsurface tile drain extents from Sugg (2007); 2) the extent of cultivated cropland from the National Land Cover Database (NLCD) 2011; 3) the extent of poorly drained soil from the State Soil Geographic (STATSGO) database Version 2; 4) the extent of federally-owned land, and 5) county administrative boundaries. Sugg's (2007) area of subsurface tile drains within each county was evenly allocated to potentially drained land -- cropland with poorly drained [...]


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SubsurfaceDrainExtentUS_90s.jpg thumbnail 2.04 MB image/jpeg
SubsurfaceDrainExtentUS_90s.tif 843.38 MB image/geotiff


This dataset was created to provide a geospatial representation of Sugg's tabular data of subsurface drainage extent. Sugg's county areas were allocated spatially over the landscape using similar methodology applied by Sugg, which assumed that row crops cultivated on poorly drained soil indicate the presence of artificial drainage. This dataset was developed in support of the Midwest Stream Quality Assessment (MSQA) study which was conducted as part of the U.S. Geological Survey National Water Quality Assessment (NAWQA) project.
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  • Eastern Tallgrass Prairie and Big Rivers Landscape Conservation Cooperative
  • LC MAP - Landscape Conservation Management and Analysis Portal
  • Mississippi River Basin / Gulf Hypoxia Initiative
  • National Water-Quality Assessment Project
  • USGS California Water Science Center
  • USGS Data Release Products



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DOI doi:10.5066/F7RB72QS

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