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Table 2

Sensitivity ranks and optimal values of the model parameters

Parameter nameBrief descriptiont-statP-valueSensitivity rankOptimal value
r_CN2.mgt SCS streamflow curve number 96.14 0.30 
v_GWQMN.gw Threshold depth of the water in the shallow aquifer required for return flow to occur 47.82 2,559.79 
v_GW_DELAY.gw Groundwater delay (days) 14.5 149.25 
v_CANMX.hru Maximum canopy storage (mm H2O) 8.12 4.74 
v_SLSUBBSN.hru Average slope length (m) −6.30 68.11 
v_ESCO.hru Soil evaporation compensation factor 3.38 − 0.06 
v_RCHRG_DP.gw Deep aquifer percolation fraction 3.17 − 0.49 
v_GW_REVAP.gw Groundwater ‘revap’ coefficient 2.03 0.04 0.12 
r_SOL_Z().sol Depth from soil surface to bottom of layer 2.00 0.09 
r_SOL_AWC().sol Available water capacity of the soil layer −1.61 0.11 10 0.83 
r_SOL_K().sol Saturated hydraulic conductivity −1.32 0.19 11 − 0.99 
v_EPCO.hru Plant uptake compensation factor 1.15 0.25 12 0.42 
v_REVAPMN.gw Threshold depth of the water in the shallow aquifer for ‘revap’ to occur (mm) 0.68 0.50 13 729.93 
v_CH_K2.rte Effective hydraulic conductivity in the main channel alluvium 0.67 0.50 14 120.65 
r_BIOMIX.mgt Biological mixing efficient −0.59 0.55 15 − 0.19 
Parameter nameBrief descriptiont-statP-valueSensitivity rankOptimal value
r_CN2.mgt SCS streamflow curve number 96.14 0.30 
v_GWQMN.gw Threshold depth of the water in the shallow aquifer required for return flow to occur 47.82 2,559.79 
v_GW_DELAY.gw Groundwater delay (days) 14.5 149.25 
v_CANMX.hru Maximum canopy storage (mm H2O) 8.12 4.74 
v_SLSUBBSN.hru Average slope length (m) −6.30 68.11 
v_ESCO.hru Soil evaporation compensation factor 3.38 − 0.06 
v_RCHRG_DP.gw Deep aquifer percolation fraction 3.17 − 0.49 
v_GW_REVAP.gw Groundwater ‘revap’ coefficient 2.03 0.04 0.12 
r_SOL_Z().sol Depth from soil surface to bottom of layer 2.00 0.09 
r_SOL_AWC().sol Available water capacity of the soil layer −1.61 0.11 10 0.83 
r_SOL_K().sol Saturated hydraulic conductivity −1.32 0.19 11 − 0.99 
v_EPCO.hru Plant uptake compensation factor 1.15 0.25 12 0.42 
v_REVAPMN.gw Threshold depth of the water in the shallow aquifer for ‘revap’ to occur (mm) 0.68 0.50 13 729.93 
v_CH_K2.rte Effective hydraulic conductivity in the main channel alluvium 0.67 0.50 14 120.65 
r_BIOMIX.mgt Biological mixing efficient −0.59 0.55 15 − 0.19 

Note: r_ means an existing parameter value is multiplied by (1 + given value); v_ means the existing parameter value is to be replaced by given value; the detail description of the parameters was introduced as technical report (Neitsch et al. 2011; Arnold et al. 2012).

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