IWA Publishing

Table 6

Range and fitted value of the sensitive parameters for flow simulation in SWAT

Rank	Parameters	Description	Range		Fitted Value
Rank	Parameters	Description	Low	High	Fitted Value
1	CH_K2	Channel effective hydraulic conductivity (mm/h)	0.01	500	386.33
2	OV_N	Manning's roughness in overland flow	0.01	30	4.464
3	CH_N2	Manning's value for main channel	0	0.3	0.275
4	ALPHA_BF	Base flow alpha factor 90 days	0	1	0.128
5	CN2	Initial SCS CN2	−0.3	0.3	0.011
6	SOL_AWC	Available water capacity (mm H₂0/mm soil)	−0.3	0.3	−0.055
7	ICN	CN calculation as a function of plant ET	0	1	0.743
8	SOL_BD	Soil Bulk Density	−0.3	0.3	0.578
9	GW_DELAY	Ground water delay time (days)	0	500	139.807
10	CANMX	Maximum canopy storage	0	100	0.243
11	GWQMN	Threshold depth of water in shallow aquifer required for return flow to occur (mm H₂O)	0	5,000	53.134
12	ESCO	Soil evaporation compensation factor	0	1	0.017
13	RCHRG_DP	Deep aquifer percolation fraction	0	1	0.021
14	SMTMP	Snowmelt base temperature, °C	−5	5	2.939
15	LAT_TTIME	Lateral flow travel time (days)	0	180	0.171
16	GW_REVAP	Groundwater revap coefficient	0.02	0.2	0.026
17	SOL_K	Saturated Hydraulic Conductivity	−0.3	0.3	0.05
18	SOL_ALB	Moist soil albedo	−0.3	0.3	0.051
19	REVAPMN	Threshold depth of water in shallow aquifer required for revap or percolation to the deep aquifer to occur (mm H₂O)	0	500	90.953

Rank	Parameters	Description	Range		Fitted Value
Rank	Parameters	Description	Low	High	Fitted Value
1	CH_K2	Channel effective hydraulic conductivity (mm/h)	0.01	500	386.33
2	OV_N	Manning's roughness in overland flow	0.01	30	4.464
3	CH_N2	Manning's value for main channel	0	0.3	0.275
4	ALPHA_BF	Base flow alpha factor 90 days	0	1	0.128
5	CN2	Initial SCS CN2	−0.3	0.3	0.011
6	SOL_AWC	Available water capacity (mm H₂0/mm soil)	−0.3	0.3	−0.055
7	ICN	CN calculation as a function of plant ET	0	1	0.743
8	SOL_BD	Soil Bulk Density	−0.3	0.3	0.578
9	GW_DELAY	Ground water delay time (days)	0	500	139.807
10	CANMX	Maximum canopy storage	0	100	0.243
11	GWQMN	Threshold depth of water in shallow aquifer required for return flow to occur (mm H₂O)	0	5,000	53.134
12	ESCO	Soil evaporation compensation factor	0	1	0.017
13	RCHRG_DP	Deep aquifer percolation fraction	0	1	0.021
14	SMTMP	Snowmelt base temperature, °C	−5	5	2.939
15	LAT_TTIME	Lateral flow travel time (days)	0	180	0.171
16	GW_REVAP	Groundwater revap coefficient	0.02	0.2	0.026
17	SOL_K	Saturated Hydraulic Conductivity	−0.3	0.3	0.05
18	SOL_ALB	Moist soil albedo	−0.3	0.3	0.051
19	REVAPMN	Threshold depth of water in shallow aquifer required for revap or percolation to the deep aquifer to occur (mm H₂O)	0	500	90.953