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Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023)

Dates

Start Date
1984-10-01
End Date
2020-09-30
Publication Date
Revision
2023-01-06

Citation

Mason, C.A., Colgin, J.E., and Moyer, D.L., 2023, Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2020 (ver. 2.0, January 2023): U.S. Geological Survey data release, https://doi.org/10.5066/P96H2BDO.

Summary

Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in major rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations stations for the period 1985 through 2020. 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 and were estimated using the WRTDS method with Kalman filtering. To determine the trend in loads, the annual load results are flow normalized to integrate [...]

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EGRETci_2.0.4.tar.gz 3.02 MB application/x-gzip
EGRET_3.0.7.tar.gz 3.76 MB application/x-gzip
R-4.1.3-win.exe 86.44 MB application/x-msdownload
NTN Load and Trend Summary 2020_ver.2.0.pdf 4.01 MB application/pdf
NTN2020_ver.2.0_Revision_Notes.txt 3.58 KB text/plain

Purpose

The purpose of this data release is to provide datasets for 1985-2020 (1) Annual Loads, (2) Monthly Loads, (3) Long- (~1985-2020) and Short- (2011-2020) Term Trends, and (4) 10- (2011-2020) and 5- (2016-2020) Year Average Yields. Additionally, essential WRTDS Input and Output files are provided.

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  • USGS Data Release Products

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Provenance

Revision 2.0 by Christopher A Mason on January 6, 2023. To review the changes that were made, see “NTN2020_ver.2.0_Revision_Notes.txt” in the attached files section.

Additional Information

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Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P96H2BDO

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