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Table 1

SWAT input parameters used for sensitivity analysis

No.	Parameter	Description	Lower and upper bounds	Initial value
1	Alpha_Bf	Baseflow alpha factor (–)	0–1^a	1
2	Blai	Maximum potential leaf area index (–)	0–1^a	61
3	Canmx	Maximum canopy storage (mmH₂O)	0–10^a	7
4	Ch_Erod	Channel erodibility factor (–)	0–1^a	50
5	Ch_K2	Channel effective hydraulic conductivity (mm/hr)	0–150^a	54
6	Ch_N2	Manning's value for main channel (–)	0–1^a	51
7	Cn2	SCS runoff curve number (–)	±25^a	10
8	Epco	Plant uptake compensation factor (–)	0–1^a	28
9	Esco	Soil evaporation compensation factor (–)	0–1^a	27
10	Gw_Delay	Groundwater delay (days)	±10^a	2
11	Gw_Revap	Groundwater revap coefficient (–)	±0.036^a	3
12	Gwqmn	Threshold water depth in the shallow aquifer for return flow to occur (mm H₂O)	±1,000^a	6
13	Rchrg_Dp	Deep aquifer percolation coefficient (–)	0–1^a	4
14	Revapmn	Threshold depth of water in the shallow aquifer for ‘revap’ to occur (mm H₂O)	±100^a	5
15	Slope	Mean slope steepness (mm⁻¹)	±25^b	23
16	Slsubbsn	Mean slope length (m)	±25^a	24
17	Sol_Alb	Moist soil albedo (–)	±25^a	22
18	Sol_Awc	Soil available water capacity (mm H₂O/mm soil)	±25^b	17
19	Sol_K	Saturated hydraulic conductivity (mm/hr)	±25^a	15
20	Sol_Z	Depth from soil surface to bottom layer (mm)	±25^a	16
21	Surlag	Surface runoff lag time (days)	0–10^a	33

No.	Parameter	Description	Lower and upper bounds	Initial value
1	Alpha_Bf	Baseflow alpha factor (–)	0–1^a	1
2	Blai	Maximum potential leaf area index (–)	0–1^a	61
3	Canmx	Maximum canopy storage (mmH₂O)	0–10^a	7
4	Ch_Erod	Channel erodibility factor (–)	0–1^a	50
5	Ch_K2	Channel effective hydraulic conductivity (mm/hr)	0–150^a	54
6	Ch_N2	Manning's value for main channel (–)	0–1^a	51
7	Cn2	SCS runoff curve number (–)	±25^a	10
8	Epco	Plant uptake compensation factor (–)	0–1^a	28
9	Esco	Soil evaporation compensation factor (–)	0–1^a	27
10	Gw_Delay	Groundwater delay (days)	±10^a	2
11	Gw_Revap	Groundwater revap coefficient (–)	±0.036^a	3
12	Gwqmn	Threshold water depth in the shallow aquifer for return flow to occur (mm H₂O)	±1,000^a	6
13	Rchrg_Dp	Deep aquifer percolation coefficient (–)	0–1^a	4
14	Revapmn	Threshold depth of water in the shallow aquifer for ‘revap’ to occur (mm H₂O)	±100^a	5
15	Slope	Mean slope steepness (mm⁻¹)	±25^b	23
16	Slsubbsn	Mean slope length (m)	±25^a	24
17	Sol_Alb	Moist soil albedo (–)	±25^a	22
18	Sol_Awc	Soil available water capacity (mm H₂O/mm soil)	±25^b	17
19	Sol_K	Saturated hydraulic conductivity (mm/hr)	±25^a	15
20	Sol_Z	Depth from soil surface to bottom layer (mm)	±25^a	16
21	Surlag	Surface runoff lag time (days)	0–10^a	33

Method of changing parameter value. ^afor changing by value and ^bby percentage.