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Table 10

The eight most sensitive SWAT parameters in the tropical basins. Numbers in parentheses show the fitted values of parameters in the corresponding basin

RankSekongSesanSeprok3S RiverBagoBelu
CN2 (55–84) CN2 (55–84) CN2 (55–84) CN2 (55–84) ESCO.hru (0.2) CN2 (51–80) 
SOL_K (1.4–8.07) SOL_K (1.4–8.07) SOL_K (1.4–8.07) SOL_K (1.4–8.07) CN_N1 (0.014) CH_K2 (1.68) 
SOL_Z (300) SOL_Z (300) SOL_Z (300) SOL_Z (300) ESCO.bsn (0.5) GW_Delay (300) 
CANMX (8.93) CANMX (8.93) CANMX (8.93) CANMX (8.93) REAVPMN (500) ESCO.hru (0.85) 
Alpha_BF (0.86) Alpha_BF (0.86) Alpha_BF (0.86) Alpha_BF (0.86) Alpha_BF (0.55) Alpha_BF (0.048) 
GW_Delay (49.61) GW_Delay (49.61) GW_Delay (49.61) GW_Delay (49.61) RCHRG_DP (0.6) CH_N2 (0.014) 
CH_K2 (146.61) CH_K2 (146.61) CH_K2 (146.61) CH_K2 (146.61) GW_Delay (10) SOL_K (0.33–7.91) 
CH_N2 (5.99) CH_N2 (5.99) CH_N2 (5.99) CH_N2 (5.99) GWQMN (0) SOL_Z (400) 
RankSekongSesanSeprok3S RiverBagoBelu
CN2 (55–84) CN2 (55–84) CN2 (55–84) CN2 (55–84) ESCO.hru (0.2) CN2 (51–80) 
SOL_K (1.4–8.07) SOL_K (1.4–8.07) SOL_K (1.4–8.07) SOL_K (1.4–8.07) CN_N1 (0.014) CH_K2 (1.68) 
SOL_Z (300) SOL_Z (300) SOL_Z (300) SOL_Z (300) ESCO.bsn (0.5) GW_Delay (300) 
CANMX (8.93) CANMX (8.93) CANMX (8.93) CANMX (8.93) REAVPMN (500) ESCO.hru (0.85) 
Alpha_BF (0.86) Alpha_BF (0.86) Alpha_BF (0.86) Alpha_BF (0.86) Alpha_BF (0.55) Alpha_BF (0.048) 
GW_Delay (49.61) GW_Delay (49.61) GW_Delay (49.61) GW_Delay (49.61) RCHRG_DP (0.6) CH_N2 (0.014) 
CH_K2 (146.61) CH_K2 (146.61) CH_K2 (146.61) CH_K2 (146.61) GW_Delay (10) SOL_K (0.33–7.91) 
CH_N2 (5.99) CH_N2 (5.99) CH_N2 (5.99) CH_N2 (5.99) GWQMN (0) SOL_Z (400) 

Note: CN2: initial runoff SCS curve number; SOL_K: saturated hydraulic conductivity (mm/hr); SOL_Z: soil depth (mm); CANMX: maximum canopy storage; Alpha_BF: baseflow alpha factor (days); GW_Delay: groundwater delay (days); CH_K2: effective hydraulic conductivity in main channel alluvium; CH_N2: Manning's n value for the main channel; ESCO.hru: soil evaporation compensation factor; CN_N1: Manning's n value for the tributary channels; ESCO.bsn: soil evaporation compensation factor; REAVPMN: threshold depth of water in the shallow aquifer for ‘revap’ or percolation to the deep aquifer to occur (mmH2O); RCHRG_DP: deep aquifer percolation fraction; GWQIMN: threshold depth of water in the shallow aquifer required for return flow to occur (mm H2O).

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