Chesapeake Bay River Input Monitoring Network 1985-2020: Short- and long-term trends
Dates
Publication Date
2021-09-16
Start Date
1984-10-01
End Date
2020-09-30
Citation
Mason, C.A., Soroka, A.M., Moyer, D.L., and Blomquist, J.D., 2021, Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay River Input Monitoring stations: Water years 1985-2020: U.S. Geological Survey data release, https://doi.org/10.5066/P93PZGMM.
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 River Input Monitoring (RIM) Network 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 RIM 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 [...]
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 River Input Monitoring (RIM) Network 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 RIM 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. 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.
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RIM_1985-2020_LT_ST_Trends.xml Original FGDC Metadata
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application/fgdc+xml
RIM_2020_TrendTable.csv
14.31 KB
text/csv
Purpose
The purpose of this data set 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.