Study on the Impact of Future Climate Change on Extreme Meteorological and Hydrological Elements in the Upper Reaches of the Minjiang River
Table 7
Sensitivity ranks and optimal values of the model parameters.
Parameter name
Brief description
Optimal value
T-stat
value
v__GW_DELAY.gw
Groundwater delay (days)
13.06
34.63
0
v__ALPHA_BF.gw
Baseflow alpha factor (days)
0.63
−7.46
0
v__TLAPS.sub
Temperature lapse rate (°C/km)
18.31
1.53
0.13
r__SOL_K(1).sol_1
Saturated hydraulic conductivity
0.72
1.23
0.22
v__NPERCO.bsn
Nitrogen percolation coefficient
9.72
1.2
0.23
v__CH_N2.rte
Manning’s n value for main channel
−5.34
−1.16
0.25
v__SPEXP.bsn
Exp. re-entrainment parameter for channel sediment routing
1.45
−0.96
0.34
v__GW_REVAP.gw
Groundwater “revap” coefficient
0.02
−1.04
0.3
v__REVAPMN.gw_1
Threshold water depth in the shallow aquifer for “revap” (mm)
2.72
0.69
0.49
v__EPCO.hru
Plant uptake compensation factor
1.27
0.66
0.51
v__PHOSKD.bsn
Phosphorus soil partitioning coefficient
147.57
0.44
0.66
r__SOL_ALB(1).sol
Moist soil albedo
0.22
0.42
0.68
v__CH_K2.rte
Channel effective hydraulic conductivity (mm/hr)
−489.23
−0.42
0.68
v__ESCO.hru
Soil evaporation compensation factor
1.09
−0.31
0.76
a__GWQMN.gw
Threshold depth of the water in the shallow aquifer required for return flow to occur
910.29
−0.29
0.77
v__SMFMN.bsn
Melt factor for snow on December 21 (mm H2O/°C-day)
11.66
0.25
0.8
r__CN2.mgt
SCS streamflow curve number
−0.58
−0.21
0.84
v__SMFMX.bsn
Melt factor for snow on June 21 (mm H2O/°C-day)
−0.88
0.13
0.9
r__SOL_AWC(1).sol
Available water capacity (mm H2O/mm soil)
−3.88
−0.04
0.97
v__TIMP.bsn
Snow pack temperature lag factor
0.76
0.03
0.98
v__SURLAG.bsn
Surface runoff lag time (days)
719.8
0.01
0.99
r_ means an existing parameter value is multiplied by (1þ given value); v_ means the existing parameter value is to be replaced by given value; the detailed description of the parameters was introduced as technical report [36, 40].
