Fig. 1. Location of War Eagle Creek Watershed with subbasins and streams.

Fig. 2. Schematic of QUAL2E model tributaries and main head waters reaches.

Fig. 3. Flowcharts for each modeling method.

Fig. 4. Qualitative comparison of measured and QUAL2E predicted TP concentrations by reach for each season with concentrations ranked within each data set and represented with increasing symbol size corresponding to increasing concentration.

Fig. 5. Qualitative comparison of measured and QUAL2E predicted NO₃-N plus NO₂-N concentrations by reach for each season with concentrations ranked within each data set and represented with increasing symbol size corresponding to increasing concentration.

Average seasonal values for measured data at War Eagle Creek near Hindsville (USGS 07049000)

Ranking by reach of TP and NO₃-N plus NO₂-N concentrations predicted by the SWAT model

List of parameters and their ranking that produced the five highest relative sensitivity for each SWAT model output

List of calibration parameters with input file extension for each output of interest for the War Eagle Watershed SWAT model

War Eagle Creek SWAT model calibration and validation results for annual RE (%) by constituent

War Eagle Creek SWAT model calibration and validation results for monthly (R²)

List of parameters and their ranking that produced the five highest relative sensitivity for each QUAL2E model output

QUAL2E model calibration parameters for each season

Percent RE for TP and NO₃-N plus NO₂-N for the three seasonal SWAT loosely coupled with QUAL2E model

Measured TP yield (USGS gauge) and model predicted TP yields

Measured NO₃-N plus NO₂-N yield (USGS gauge) and model predicted NO₃-N plus NO₂-N yields

Regression statistics from comparing measured and predicted TP monthly values using both modeling methods

Regression statistics from comparing measured and predicted NO₃-N plus NO₂-N monthly values using both modeling methods