Nitrogen flux estimates in support of Chesapeake Bay Hypoxia and Anoxia forecasts, 1985-2021

Data release includes the U.S. Geological Survey (USGS) estimate of spring nitrogen fluxes summed from nine tributaries to the Chesapeake Bay from 1985 to 2021. Data are presented as the sum from tributaries within the USGS River Input Monitoring (RIM) network identified by site numbers: 01491000, 01578310, 01594440, 01646580, 01668000, 01673000, 01674500, 02035000, 02041650. Periods of estimation include January through May and November through May. The estimates are made using up-to-date streamflow and all total nitrogen analyses available as of June 1 of the reporting year.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
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identifier USGS:60f97f3dd34e3ccd82fe3f4b
metadata_type geospatial
modified 20210817
old-spatial -79.1675, 36.2085, -74.9048, 42.7144
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 6afc36dc6c388b98451bc15cc6132a5fcda56ab9
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-79.1675, 36.2085], [-79.1675, 42.7144], [ -74.9048, 42.7144], [ -74.9048, 36.2085], [-79.1675, 36.2085]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • appomattox-river
  • chesapeake-bay
  • choptank-river
  • ckan
  • geo
  • geoss
  • james-river
  • mattaponi-river
  • national
  • nitrogen-flux
  • nitrogen-load
  • north-america
  • pamunkey-river
  • patuxent-river
  • potomac-river
  • rappahannock-river
  • susquehanna-river
  • united-states
  • usgs-60f97f3dd34e3ccd82fe3f4b
isopen False
license_id notspecified
license_title License not specified
maintainer Joel D Blomquist
maintainer_email jdblomqu@usgs.gov
metadata_created 2025-11-20T08:13:36.813274
metadata_modified 2025-11-20T08:13:36.813279
notes Data release includes the U.S. Geological Survey (USGS) estimate of spring nitrogen fluxes summed from nine tributaries to the Chesapeake Bay from 1985 to 2021. Data are presented as the sum from tributaries within the USGS River Input Monitoring (RIM) network identified by site numbers: 01491000, 01578310, 01594440, 01646580, 01668000, 01673000, 01674500, 02035000, 02041650. Periods of estimation include January through May and November through May. The estimates are made using up-to-date streamflow and all total nitrogen analyses available as of June 1 of the reporting year.
num_resources 2
num_tags 21
title Nitrogen flux estimates in support of Chesapeake Bay Hypoxia and Anoxia forecasts, 1985-2021