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The second version of the model, hereinafter simply MISDc (Brocca et al. 2013a), was used in this study for simulating continuous discharge time series at the closure section of the Seveso basin. The SWB component incorporates five parameters: Wmax (maximum water capacity of the soil layer), Ks (saturated hydraulic conductivity), m (drainage exponent), Nu (fraction of drainage versus interflow) and b (correction factor for actual evapotranspiration). The RR component requires only three parameters: η (lag-time parameter), λ (initial abstraction coefficient) and Sr (parameter of S versus W(t) relationship). As shown in Brocca et al. (2011a), during the calibration process, each parameter can vary over a physical admissible range as reported in Table 1.

Table 1

Description, unit of measure and range of the calibration parameters for MISDc

Model componentParameterDescriptionUnitRange
SWB Wmax Maximum water capacity of the soil layer Mm 100–1,000 
Ks Saturated hydraulic conductivity mm h−1 0.01–20 
M Drainage exponent – 5–60 
Nu Fraction of drainage versus interflow – 0–1 
b Correction factor for actual evapotranspiration – 0.4–2 
RR  Lag-time parameter – 0.5–6.5 
 Initial abstraction coefficient – 0.0001–0.2 
Sr Parameter of S versus W(t) relationship – 1–4 
Model componentParameterDescriptionUnitRange
SWB Wmax Maximum water capacity of the soil layer Mm 100–1,000 
Ks Saturated hydraulic conductivity mm h−1 0.01–20 
M Drainage exponent – 5–60 
Nu Fraction of drainage versus interflow – 0–1 
b Correction factor for actual evapotranspiration – 0.4–2 
RR  Lag-time parameter – 0.5–6.5 
 Initial abstraction coefficient – 0.0001–0.2 
Sr Parameter of S versus W(t) relationship – 1–4 

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