Attributes for MRB_E2RF1 Catchments in Selected Major River Basins of the Conterminous United States: Contact Time, 2002

This tabular data set represents the average contact time, in units of days, compiled for every MRB_E2RF1 catchment of Major River Basins (MRBs, Crawford and others, 2006). Contact time, as described in Vitvar and others (2002), is defined as the baseflow residence time in the subsurface. The source data set was the U.S. Geological Survey's (USGS) 1-kilometer grid for the conterminous United States (D.M. Wolock, U.S. Geological Survey, written commun., 2008).

The MRB_E2RF1 catchments 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).

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).

Data e Risorse

Campo Valore
accessLevel public
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identifier USGS:c438ae58-988f-44a9-8a8d-3d70016274e4
metadata_type geospatial
modified 20201117
old-spatial {"type": "Polygon", "coordinates": [[[-127.910792, 23.243486], [-127.910792, 51.657387], [ -65.327751, 51.657387], [ -65.327751, 23.243486], [-127.910792, 23.243486]]]}
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
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spatial {"type": "Polygon", "coordinates": [[[-127.910792, 23.243486], [-127.910792, 51.657387], [ -65.327751, 51.657387], [ -65.327751, 23.243486], [-127.910792, 23.243486]]]}
theme {geospatial}
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • amerigeo
  • amerigeoss
  • cali
  • california
  • catchment
  • ckan
  • contact-time
  • conterminous-united-states
  • environment
  • geo
  • geoscientificinformation
  • geoss
  • glmr
  • great-lakes-ohio-upper-mississippi-and-souris-red-rainy
  • inlandwaters
  • lmtg
  • lower-mississippi-arkansas-white-red-and-texas-gulf
  • major-river-basins
  • missouri
  • mori
  • mrb
  • mrb2
  • mrb3
  • mrb4
  • mrb5
  • mrb7
  • mrb8
  • mrbe2rf1
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  • national
  • nawqa
  • north-america
  • pacific-northwest
  • panw
  • sagt
  • south-atlantic-gulf-and-tennessee
  • sparrow
  • united-states
  • usgs-c438ae58-988f-44a9-8a8d-3d70016274e4
isopen False
license_id notspecified
license_title License not specified
maintainer Michael E. Wieczorek
maintainer_email mewieczo@usgs.gov
metadata_created 2025-11-22T16:32:31.076372
metadata_modified 2025-11-22T16:32:31.076376
notes This tabular data set represents the average contact time, in units of days, compiled for every MRB_E2RF1 catchment of Major River Basins (MRBs, Crawford and others, 2006). Contact time, as described in Vitvar and others (2002), is defined as the baseflow residence time in the subsurface. The source data set was the U.S. Geological Survey's (USGS) 1-kilometer grid for the conterminous United States (D.M. Wolock, U.S. Geological Survey, written commun., 2008). The MRB_E2RF1 catchments 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). 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).
num_resources 2
num_tags 39
title Attributes for MRB_E2RF1 Catchments in Selected Major River Basins of the Conterminous United States: Contact Time, 2002