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Table 2

Parameters used for calibration of surface runoff, baseflow, P and N

Parameter descriptionParameterDefault valuesFinal valuesHRUs for which parameter is changed
Curve number CN Varies 15% decrease All HRUs 
Available water capacity of soil layer (mm H2O/mm soil) SOL_AWC Varies 15% increase All HRUs 
Saturated hydraulic conductivity (mm/hr) SOL_K Varies 10% decrease All HRUs 
Biological mixing efficiency BIOMIX 0.2 0.01 All HRUs 
Baseflow alpha factor (1/days) ALPHA_BF 0.048 0.50 All HRUs 
Groundwater ‘revap’ coefficient GW_REVAP 0.02 0.2 All HRUs 
Deep aquifer percolation factor RCHRG_DP 0.05 0.25 All HRUs 
Groundwater delay time (days) GW_DELAY 31 100 All HRUs 
USLE equation support practice factor USLE_P 15% decrease All HRUs 
Exponent parameter for calculating sediment re-entrained in channel sediment routing SPEXP 1.5 All HRUs 
Peak rate adjustment factor for sediment routing in the main channel PRF 0.5 All HRUs 
Peak rate adjustment factor for sediment routing in the subwatershed ADJ_PKR 0.5 All HRUs 
Manning's n value for overland flow OV_N 0.1 0.4 FORESTED 
Initial soluble P concentration in soil layer (mg P/kg soil) SOL_LABP All HRUs 
Initial organic P concentration in soil layer (mg P/kg soil) SOL_ORGP 0.01 All HRUs 
Organic N in the baseflow (mg/L) LAT_ORGN All HRUs 
Initial organic N concentration in the soil layer (mg N/kg soil) SOL_ORGN 0.01 All HRUs 
Parameter descriptionParameterDefault valuesFinal valuesHRUs for which parameter is changed
Curve number CN Varies 15% decrease All HRUs 
Available water capacity of soil layer (mm H2O/mm soil) SOL_AWC Varies 15% increase All HRUs 
Saturated hydraulic conductivity (mm/hr) SOL_K Varies 10% decrease All HRUs 
Biological mixing efficiency BIOMIX 0.2 0.01 All HRUs 
Baseflow alpha factor (1/days) ALPHA_BF 0.048 0.50 All HRUs 
Groundwater ‘revap’ coefficient GW_REVAP 0.02 0.2 All HRUs 
Deep aquifer percolation factor RCHRG_DP 0.05 0.25 All HRUs 
Groundwater delay time (days) GW_DELAY 31 100 All HRUs 
USLE equation support practice factor USLE_P 15% decrease All HRUs 
Exponent parameter for calculating sediment re-entrained in channel sediment routing SPEXP 1.5 All HRUs 
Peak rate adjustment factor for sediment routing in the main channel PRF 0.5 All HRUs 
Peak rate adjustment factor for sediment routing in the subwatershed ADJ_PKR 0.5 All HRUs 
Manning's n value for overland flow OV_N 0.1 0.4 FORESTED 
Initial soluble P concentration in soil layer (mg P/kg soil) SOL_LABP All HRUs 
Initial organic P concentration in soil layer (mg P/kg soil) SOL_ORGP 0.01 All HRUs 
Organic N in the baseflow (mg/L) LAT_ORGN All HRUs 
Initial organic N concentration in the soil layer (mg N/kg soil) SOL_ORGN 0.01 All HRUs 
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