Chesapeake Bay Nontidal Network 1985-2014: WRTDS Input Data

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2014. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the NTN watersheds. To determine the trend in loads, the annual load results are flow normalized to integrate out the year-to-year variability in river discharge. The trend in load is derived from the flow-normalized load timeseries and represents the change in load resulting from changes in sources, delays associated with storage or transport of historical inputs, and (or) implemented management actions.

Data and Resources

Field Value
accessLevel public
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identifier USGS:59d50531e4b05fe04cc53442
metadata_type geospatial
modified 20200827
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
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • geo
  • geoss
  • load-analysis
  • national
  • nitrogen
  • north-america
  • nutrient-content
  • phosphorus
  • suspended-sediment
  • united-states
  • usgs-59d50531e4b05fe04cc53442
  • water-quality
  • wrtds
isopen False
license_id notspecified
license_title License not specified
maintainer Douglas L. Moyer
maintainer_email dlmoyer@usgs.gov
metadata_created 2025-11-22T13:43:05.502020
metadata_modified 2025-11-22T13:43:05.502024
notes Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2014. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the NTN watersheds. To determine the trend in loads, the annual load results are flow normalized to integrate out the year-to-year variability in river discharge. The trend in load is derived from the flow-normalized load timeseries and represents the change in load resulting from changes in sources, delays associated with storage or transport of historical inputs, and (or) implemented management actions.
num_resources 2
num_tags 16
title Chesapeake Bay Nontidal Network 1985-2014: WRTDS Input Data