Table A2.

Calibrated SWAT snow parameters and their optimal values.

Scenario	Parameter	Description	Changing Method	Optimal Range
				Tizi Nisly	Tillouguite	Ait Ouchene	Bine EL Oudiane
S1	TIMP.bsn	Snowpack temperature lag factor (-)	Replace	[0.43:0.24]
	SFTMP.bsn	Snowfall temperature (°C)	Replace	[−0.32:−0.61]
	SMTMP.bsn	Snowmelt base temperature (°C)	Replace	[0.05:−0.03]
	SMFMX.bsn	Maximum melt rate for snow during year (mm H2O/°C-day)	Replace	[8.118:6.34]
	SMFMN.bsn	Minimum melt rate for snow during the year (mm H2O/°C-day)	Replace	[1.34:0.13]
	SNOCOVMX	Minimum snow water content that corresponds to 100% snow cover [mm]	Replace	[18.01:24.56]
	SNO50COV	Fraction of snow volume represented by SNOCOVMX that corresponds to 50% snow cover	Replace	[0.1:0.9]
S2	SUB_TIMP.sno	Snowpack temperature lag factor (-)	Replace	[0.62:0.14]	[0.46:0.15]	[0.58:0.22]	[0.44:0.04]
	SUB_SFTMP.sno	Snowfall temperature (°C)	Replace	[0.4: −0.34]	[−0.13:−0.76]	[0.15:−0.29]	[0.63:−0.65]
	SUB_SMTMP.sno	Snowmelt base temperature (°C)	Replace	[0.52:0.05]	[1.13:0.14]	[0.1:−0.2]	0.5:−0.89]
	SUB_SMFMX.sno	Maximum melt rate for snow during year (mm H2O/°C-day)	Replace	[8.23:6.48]	[6.91:5.21]	[8.32:4.51]	[6.92:4.12]
	SUB_SMFMN.sno	Minimum melt rate for snow during the year (mm H2O/°C-day)	Replace	[1.82:1.39]	[1.05:0.12]	[1.45:0.61]	[1.4:0.44]
	SUB_SNOCOVMX.sno	Minimum snow water content that corresponds to 100% snow cover [mm]	Replace	[12.67:18.40]	[15.58:31.30]	[16.92:24.65]	[12.11:28.49]
	SUB_SNO50COV.sno	Fraction of snow volume represented by SNOCOVMX that corresponds to 50% snow cover	Replace	[0.23:0.77]	[0.30:0.81]	[0.21:0.76]	[0.17:0.63]