Skip to main content

Chesapeake Bay Nontidal Network 1985-2018: WRTDS input data


Publication Date
Start Date
End Date


Moyer, D.L., and Langland, M.J., 2020, Nitrogen, phosphorus, and suspended-sediment loads and trends measured at the Chesapeake Bay Nontidal Network stations: Water years 1985-2018 (ver. 2.0, May 2020): U.S. Geological Survey data release,


Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in 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 2018. 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. The files containing all inputs required to run WRTDS for all applicable NTN monitoring stations are provided in the "Attached Files" section.


Attached Files

Click on title to download individual files attached to this item.

“WRTDS input parameter values for determination of trend”
43.94 KB text/csv
“NTN station description and initial WRTDS model parameters”
452.9 KB application/zip
“Observed daily discharge”
82.32 MB application/zip
“Discrete observed water-quality data and WRTDS estimates of discrete observation”
14.85 MB application/zip


These datasets contain the required discharge and water-quality input datasets and model variables to run the WRTDS models.

Item Actions

View Item as ...

Save Item as ...

View Item...