Water quality modeling results of total phosphorus for the lower Boise River near Parma, Idaho 2002 - 2021

Three water-quality models were generated to estimate total phosphorus (TP) concentrations and loads from 2002 – 2021 in the Boise River near Parma, Idaho. A Weighted Regression on Time Discharge and Season (WRTDS) model and a Weighted Regression on Time Discharge and Season with Kalman filtering (WRTDS-K) model were generated using all observations within the study period to quantify rate of change in TP concentrations and loads. Further, these two models in addition to the Load ESTimator (LOADEST) model were generated using a subset of the observation data and evaluated on the observations withheld from model generation. The results of the models generated with all data are provided in one file ("full_mod_results.csv"), and the results of the models generated with a subset of the data are provided in a second file ("monthly_model_results.csv"). Mean daily discharge and observed total phosphorus are included in each file for comparison against model output.