Enhancing Understanding of Hydrologic Processes in the Shafe Watershed, Ethiopia

Table 9

Shafe watershed sensitive model parameters and ranks.

Parameter name	Description	t-Stat	p-Value	Rank	Sensitivity
ALPHA_BF	Alpha base flow recession constant	−107.30	0.001	1	High
CN2	SCS runoff curve number	−17.29	0.009	2	High
CH_K2	Effective hydraulic conductivity in main channel	10.96	0.010	3	High
ESCO	soil evaporation compensation factor	−1.62	0.106	4	Moderate
EPCO	Plant uptake compensation factor	−1.56	0.119	5	Moderate
SOL_AWC	Available water content of soil	−1.13	0.259	6	Moderate
SLSUBBSN	Average slope length	1.10	0.272	7	Moderate
SOL_Z	Soil depth (for each layer)	0.87	0.387	8	Moderate
SURLAG	Surface runoff lag time	−0.73	0.468	9	Low
GWQMN	Threshold depth of water in the shallow aquifer	−0.66	0.511	10	Low
RCHRG_DP	Deep aquifer percolation fraction	−0.56	0.574	11	Low
GW_REVAP	Groundwater “revap” coefficient	−0.56	0.577	12	Low
REVAPMN	Threshold depth of water in the aquifer for “revap” to occur	−0.53	0.596	13	Least
CH_S2	Average slope of main channel	0.49	0.627	14	Least
CANMX	Maximum canopy storage	−0.37	0.712	15	Least
SOL_K	Saturated hydraulic conductivity	0.35	0.725	16	Least
PPERCO	Phosphorus percolation coefficient	0.35	0.726	17	Least
CH_N2	Manning’s n” value for the main channel	−0.31	0.759	18	Least
GW_DELAY	Groundwater delay	0.20	0.842	19	Least