Advances in Meteorology

Research Article

Potential Impacts of Projected Climate Change under CMIP5 RCP Scenarios on Streamflow in the Wabash River Basin

Table 5

Initial and final ranges, best estimations, and values for SWAT calibration.


Parameters	Initial range	Final range	Best estimations	values

r_CN2.mgt	−0.50/0.50	−0.24/0.11	0.07	0.00
v_ALPHA_BF.gw	0.00/1.00	0.47/0.82	0.75	0.57
v_GW_DELAY.gw	30.00/450.00	43.82/195.70	178.46	0.00
r_GWQMN.gw	−0.90/1.00	−0.20/0.60	0.21	0.03
v_ALPHA_BNK.rte	0.00/1.00	0.61/1.00	0.88	0.00
v_CH_N2.rte	0.00/0.30	0.05/0.16	0.09	0.77
v_CH_N1.sub	0.00/1.00	0.00/0.34	0.06	0.08
v_EPCO.hru	0.01/1.00	0.52/1.00	0.57	0.99
r_SLSUBBSN.hru	−0.50/0.65	−0.19/0.15	0.13	0.37
v_ESCO.hru	0.00/1.00	0.70/1.00	0.80	0.00
v_GW_REVAP.gw	0.02/0.20	0.05/0.15	0.07	0.00
v_RCHRG_DP.gw	0.00/1.00	0.10/0.53	0.11	0.00
r_OV_N.hru	−0.80/4.00	0.41/2.84	1.40	0.67
v_REVAPMN.gw	0.00/500.00	0.00/158.87	55.44	0.77
v_CH_K2.rte	0.00/500.00	0.00/195.14	156.21	0.02
r_SOL_K(1).sol	−0.90/9.00	−0.9/2.16	0.90	0.06
r_SOL_AWC(1).sol	−0.80/9.00	1.91/4.98	3.38	0.91
v_SFTMP.bsn	−5.00/5.00	−2.18/2.61	0.53	0.83
v_SMTMP.bsn	−5.00/5.00	1.90/5.00	2.92	0.76
r_SOL_BD(1).mgt	−0.50/0.60	0.10/0.57	0.54	0.01

CN2: SCS runoff curve number for moisture condition II; ALPHA_BF: baseflow alpha factor (days); GW_DELAY: groundwater delay time (days); GWQMN: threshold depth of water in the shallow aquifer required for the return flow to occur (mm); ALPHA_BNK: baseflow alpha factor for bank storage (days); CH_N2: Manning’s “n” value for the main channel; CH_N1: Manning’s “n” value for the tributary channel; EPCO: plant uptake compensation factor; SLSUBBSN: average slope length (m); ESCO: soil evaporation compensation factor; GW_REVAP: groundwater “revap” coefficient; RCHRG_DP: deep aquifer percolation fraction; OV_N: Manning’s “n” value for the overland flow; REVAPMN: threshold depth of water in the shallow aquifer for “revap” or percolation to the deep aquifer to occur (mm); CH_K2: effective hydraulic conductivity in the main channel alluvium (mm/hr); SOL_K: saturated hydraulic conductivity (mm/hr); SOL_AWC: available water capacity of the soil layer (mm); SFTMP: snowfall temperature (°C); SMTMP: snowmelt base temperature (°C); SOL_BD: moist bulk density (mg/m³). V_ means the existing parameter value is to be replaced by a given value; r_ means an existing parameter value is multiplied by (1 + a given value).