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Table 2

Key PRMS calibration parameters with their description

Calibration objectiveObjective functionParametersDescription
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 objectiveObjective functionParametersDescription
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 
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