Chesapeake Bay Nontidal Network 1985-2023: Average annual yields
Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed were calculated using monitoring data from the Chesapeake Bay Nontidal network (NTN) stations for the period 1985 through 2023. 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). Yields are determined by dividing the annual load of a constituent at a station by the watershed area from which the constituent was transported. Yields can be used to compare loads exported from different basins or subwatersheds. The results presented in this data release represent the average annual per-acre loads of nitrogen, phosphorus, and suspended sediment exported from each of the NTN stations for two possible time periods: 2014-2023 (10-year average yield) and 2019-2023 (5-year average yield). The file containing 10- and 5-year average yields for all applicable NTN monitoring stations is provided in the "Attached Files" section.
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[ "010:12" ] |
| contactPoint |
{ "fn": "Christopher A. Mason", "@type": "vcard:Contact", "hasEmail": "mailto:camason@usgs.gov" } |
| description | Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed were calculated using monitoring data from the Chesapeake Bay Nontidal network (NTN) stations for the period 1985 through 2023. 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). Yields are determined by dividing the annual load of a constituent at a station by the watershed area from which the constituent was transported. Yields can be used to compare loads exported from different basins or subwatersheds. The results presented in this data release represent the average annual per-acre loads of nitrogen, phosphorus, and suspended sediment exported from each of the NTN stations for two possible time periods: 2014-2023 (10-year average yield) and 2019-2023 (5-year average yield). The file containing 10- and 5-year average yields for all applicable NTN monitoring stations is provided in the "Attached Files" section. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Digital Data", "format": "XML", "accessURL": "https://doi.org/10.5066/P13P4TWR", "mediaType": "application/http", "description": "Landing page for access to the data" }, { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "XML", "mediaType": "text/xml", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.67af59b9d34e5020fb91f07e.xml" } ] |
| identifier | http://datainventory.doi.gov/id/dataset/USGS_67af59b9d34e5020fb91f07e |
| keyword |
[ "Chesapeake Bay Watershed", "Delaware", "Kalman filtering", "Maryland", "New York", "Pennsylvania", "USGS:67af59b9d34e5020fb91f07e", "United States", "Virginia", "WRTDS", "WRTDS-Kalman", "Washington DC", "West Virginia", "load analysis", "nitrogen", "nutrients", "phosphorus", "rivers", "suspended sediment", "trends", "water quality", "weighted regression", "yields" ] |
| modified | 2025-03-13T00:00:00Z |
| publisher |
{ "name": "U.S. Geological Survey", "@type": "org:Organization" } |
| spatial | -79.167480469182, 36.208470061656, -74.904785156852, 42.714410712674 |
| theme |
[ "geospatial" ] |
| title | Chesapeake Bay Nontidal Network 1985-2023: Average annual yields |
