Key PRMS calibration parameters with their description
| Calibration objective . | Objective function . | Parameters . | Description . |
|---|---|---|---|
| Potential evapotrans-piration | Sum of absolute difference | jh_coef | Coefficient used in Jensen–Haise potential ET computations |
| jh_coef_ hru | Coefficient used in Jensen–Haise potential ET computations | ||
| Annual runoff volume | Normalized root mean square error | rain_adj | Monthly (January–December) factor to adjust measured precipitation on each HRU to account for differences in elevation, and so forth |
| psta_freq_nuse | The subset of precipitation measurement stations used to determine if there is precipitation in the basin | ||
| psta_nuse | The subset of precipitation measurement stations used in the distribution regression | ||
| Streamflow timing | Normalized root mean square error and Nash–Sutcliffe modeling efficiency | smidx_coef | Non-linear contributing area coefficient |
| smidx_exp | Exponent in non-linear contributing area coefficient | ||
| soil2gw_max | Maximum soil water excess that is routed directly to groundwater | ||
| soil_moist_max | Maximum available water holding capacity of soil profile | ||
| soil_rechr_max | Maximum available water holding capacity of recharge zone | ||
| ssr2gw_exp | Non-linear coefficient in equation used to route soil-zone water to groundwater | ||
| ssr2gw_rate | Linear coefficient in equation used to route soil-zone water to groundwater | ||
| gwflow_coef | Linear groundwater discharge coefficient |
| Calibration objective . | Objective function . | Parameters . | Description . |
|---|---|---|---|
| Potential evapotrans-piration | Sum of absolute difference | jh_coef | Coefficient used in Jensen–Haise potential ET computations |
| jh_coef_ hru | Coefficient used in Jensen–Haise potential ET computations | ||
| Annual runoff volume | Normalized root mean square error | rain_adj | Monthly (January–December) factor to adjust measured precipitation on each HRU to account for differences in elevation, and so forth |
| psta_freq_nuse | The subset of precipitation measurement stations used to determine if there is precipitation in the basin | ||
| psta_nuse | The subset of precipitation measurement stations used in the distribution regression | ||
| Streamflow timing | Normalized root mean square error and Nash–Sutcliffe modeling efficiency | smidx_coef | Non-linear contributing area coefficient |
| smidx_exp | Exponent in non-linear contributing area coefficient | ||
| soil2gw_max | Maximum soil water excess that is routed directly to groundwater | ||
| soil_moist_max | Maximum available water holding capacity of soil profile | ||
| soil_rechr_max | Maximum available water holding capacity of recharge zone | ||
| ssr2gw_exp | Non-linear coefficient in equation used to route soil-zone water to groundwater | ||
| ssr2gw_rate | Linear coefficient in equation used to route soil-zone water to groundwater | ||
| gwflow_coef | Linear groundwater discharge coefficient |