Input and results from a boosted regression tree (BRT) model relating base flow nitrate concentrations in the Chesapeake Bay watershed to catchment characteristics (1970-2013)

This data release contains a boosted regression tree (BRT) model (written in the R programming language), and the input and output data from that model that were used to relate base flow nitrate concentrations in the Chesapeake Bay watershed to catchment characteristics. The input data consists of two types of information: 1) surface water nitrate concentrations collected by the USGS and partnering agencies in the Chesapeake Bay watershed between 1970 and 2013 and 2) potential predictor variables that included nitrogen sources, catchment characteristics, soil and groundwater chemistry, soil drainage and composition, and aquifer geology. The results from the BRT model were used to identify ten significant predictors of base flow nitrate concentrations in streams in the Chesapeake Bay watershed.

Data and Resources

Field Value
accessLevel public
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identifier USGS:5f4044fd82ce8df5b6cb43fd
metadata_type geospatial
modified 20201130
old-spatial -79.167480469182, 36.208470061656, -74.904785156852, 42.714410712674
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 521a84e21299785b670c7a08d20e94ba523cc7b2
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spatial {"type": "Polygon", "coordinates": [[[-79.167480469182, 36.208470061656], [-79.167480469182, 42.714410712674], [ -74.904785156852, 42.714410712674], [ -74.904785156852, 36.208470061656], [-79.167480469182, 36.208470061656]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • geo
  • geoss
  • national
  • north-america
  • nutrient-content-water
  • surface-water-quality
  • united-states
  • usgs-5f4044fd82ce8df5b6cb43fd
isopen False
license_id notspecified
license_title License not specified
maintainer Susan Wherry
maintainer_email swherry@usgs.gov
metadata_created 2025-11-22T23:09:30.617861
metadata_modified 2025-11-22T23:09:30.617865
notes This data release contains a boosted regression tree (BRT) model (written in the R programming language), and the input and output data from that model that were used to relate base flow nitrate concentrations in the Chesapeake Bay watershed to catchment characteristics. The input data consists of two types of information: 1) surface water nitrate concentrations collected by the USGS and partnering agencies in the Chesapeake Bay watershed between 1970 and 2013 and 2) potential predictor variables that included nitrogen sources, catchment characteristics, soil and groundwater chemistry, soil drainage and composition, and aquifer geology. The results from the BRT model were used to identify ten significant predictors of base flow nitrate concentrations in streams in the Chesapeake Bay watershed.
num_resources 2
num_tags 11
title Input and results from a boosted regression tree (BRT) model relating base flow nitrate concentrations in the Chesapeake Bay watershed to catchment characteristics (1970-2013)