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  3. 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)
  4. Chesapeake Bay Nontidal Network 1985-2020: Short- and long-term trends (ver. 2.0, January 2023)

Chesapeake Bay Nontidal Network 1985-2020: Short- and long-term trends (ver. 2.0, January 2023)

Dates

Start Date
1984-10-01
End Date
2020-09-30

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 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. To determine the trend in loads, the regular annual load (non-Kalman) results are flow normalized to integrate out the year-to-year variability in river discharge. [...]

Contacts

Point of Contact :
Christopher A Mason, Virginia and West Virginia Water Science Center
Originator :
Christopher A Mason, James E Colgin, Douglas L Moyer
Metadata Contact :
Christopher A Mason
Publisher :
U.S. Geological Survey
USGS Mission Area :
Water Resources
SDC Data Owner :
Virginia and West Virginia Water Science Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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NTN_1985-2020_LT_ST_Trends_ver.2.0.xml
Original FGDC Metadata
View 		15.85 KB application/fgdc+xml
NTN_2020_TrendTable_ver.2.0.csv 63.66 KB text/csv
NTN2020_ver.2.0_Revision_Notes.txt 3.58 KB text/plain

Purpose

The purpose of this dataset is to communicate long-term (~36 years) and/or short-term (10 years) trends (or) total change in annual loads of nitrogen, phosphorus, and suspended sediment being transported by the nontidal portion of the major rivers in the bay watershed for the period 1985 through 2020.

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