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Weighted Regressions on Time, Discharge and Season (WRTDS) and WRTDS with Kalman filtering (WRTDS_K) models were developed for total and dissolved cadmium, zinc and lead; total phosphorus and nitrogen; and dissolved orthophosphate at twelve sites in the Spokane River watershed, northern Idaho, for water years 1990 to 2018. The data table contains the annual mean concentrations and annual total loads estimated by WRTDS_K, and the flow-normalized annual mean concentrations and flow-normalized annual total loads estimated by WRTDS for each modeled site and constituent.
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Weighted Regressions on Time, Discharge and Season (WRTDS) models were developed for total and dissolved cadmium, lead and zinc; total phosphorus and nitrogen; and dissolved orthophosphate at twelve sites in the Spokane River watershed for water years 1990 to 2018. Bootstrapped model replicates were run to determine the statistical likelihoods of trends in flow-normalized concentrations and loads over the period of record and water years 2009-2018 for each constituent at each site. The data table contains the change in concentrations and loads and the numeric and descriptive statistical likelihoods associated with the trends over the two time periods for each constituent and site.
    map background search result map search result map Annual mean concentrations and annual total loads from WRTDS and WRTDS_K models for sites in the Spokane River watershed, water years 1990 to 2018 WRTDS bootstrapped concentration and load trend likelihoods for sites in the Spokane River watershed, water years 1990 to 2018 Annual mean concentrations and annual total loads from WRTDS and WRTDS_K models for sites in the Spokane River watershed, water years 1990 to 2018 WRTDS bootstrapped concentration and load trend likelihoods for sites in the Spokane River watershed, water years 1990 to 2018