Table 1 Parameter descriptions as well as ranges for the HBV model.

Snow and ice melt modules

TT

°C

threshold temperature

(-inf,inf)

0

CFMAX

mm/(Δt*°C)

degree-Δt factor

[0,inf)

3

SP

—

seasonal variability in degree-Δt factor

[-1,1]

0

SFCF

—

snowfall correction factor

[0,inf)

1

CFR

—

refreezing coefficient

[0,inf)

0.05

CWH

—

water holding capacity

[0,inf)

0.1

CFGlacier

—

glacier correction factor

[0,inf)

1

CFSlope

—

slope correction factor

(0,inf)

1

KSI

1/Δt

Snow to Ice conversion factor

[0,0.1]

0

KGmin

1/t

Minimum outflow coefficient

[0.01,0.4]

0.01

RangeKG

1/t

Maximum minus minimum outflow coefficient

[0.01,0.5]

0.01

AG

1/mm

Calibration parameter

[0,1]

0

Soil module

FC

mm

maximum soil moisture storage

(0,inf)

200

LP

—

soil moisture value above which AET reaches PET

[0,1]

1

BETA

—

parameter that determines the relative contribution to runoff from rain or snowmelt

(0,inf)

1

Response Module

PERC

mm/Δt

treshold parameter

[0,inf)

1

UZL

mm

treshold parameter

[0,inf)

20

K0

1/Δt

storage (or recession) coefficient 0

[0,1)

0.2

K1

1/Δt

storage (or recession) coefficient 1

[0,1)

0.1

K2

1/Δt

storage (or recession) coefficient 2

[0,1)

0.05

Converging module

MAXBAS

Δt

length of triangular weighting function

[1,100]

1

Others

Cet

1/°C

potential evaporation correction factor

[0,1]

0

PCALT

%/100 m

increase of precipitation with elevation

(-inf,inf)

10

TCALT

°C/100 m

decrease of temperature with elevation

(-inf,inf)

0.6

Pelev

m

elevation of precipitation data in the PTQ file

(-inf,inf)

0

Telev

m

elevation of temperature data in the PTQ file

(-inf,inf)

0