Prioritization of Susceptible Watershed to Sediment Yield and Evaluation of Best Management Practice: A Case Study of Awata River, Southern Ethiopia

Table 6

Streamflow calibration parameters and their sensitivity rank.

Rank	Parameter	Description of parameter	Range value	t-stat	value
1	R_CN2.mgt	SCS runoff curve number	±0.2	−16.81	0
2	V_HRU_SLP.hru	Average slope steepness	0-1	−15.94	0
3	V_RCHRG_DP.gw	Deep aquifer percolation fraction	0-1	−15.51	0
4	V_CANMX.hru	Maximum canopy storage	0–100	7.63	0
5	V_ALPHA_BF.gw	Baseflow alpha factor	0-1	6.73	0
6	R_SOL_K.sol	Saturated hydraulic conductivity	±0.25	−5.72	0
7	R_SLSUBBSN.hru	Average slope length	±0.25	4.4	0
8	R_SOL_AWC.sol	Available water content of soil	±0.25	−2.41	0.02
9	V_GW_DELAY.gw	Groundwater delay	100–500	1.38	0.17
10	V_CH_N2.rte	Manning’s “n” value for the main channel	−0.01–0.3	1.25	0.21
11	V_CH_K2.rte	Effective hydraulic conductivity of main channel alluvium	−0.01–500	−0.67	0.5
12	V_SURLAG.bsn	Surface runoff lag time	0.05–24	−0.67	0.5
13	V_GW_REVAP.gw	Groundwater revap coefficient	0.02–0.2	0.52	0.61
14	V_GWQMN.gw	Threshold depth of water in the shallow aquifer for return flow to occur	3500–5000	−0.46	0.65
15	V_REVAPMN.gw	Threshold depth of water in the shallow aquifer for revap to occur	100–500	0.35	0.72
16	V_OV_N.hru	Manning’s “n” value for overland flow	0-1	0.31	0.76
17	V_EPCO.bsn	Plant uptake compensation factor	0-1	0.26	0.79
18	R_SOL_Z.sol	Soil depth (for each layer)	±0.25	−0.1	0.92
19	V_ESCO.bsn	Soil evaporation compensation factor	0-1	−0.06	0.95