This work tests different options for simulating hydrology in basins with karst areas. The Soil and Water Assessment Tool (SWAT) model was applied to the Canale d'Aiedda (Puglia, Italy), a Mediterranean temporary karst river basin. Different basin delineations and model parameterizations were adopted that include: (i) cutoff of the karst areas (configuration A); (ii) basin set-up including the karst areas (configuration B) and (iii) model parameterization considering a bypass flow in karst sub-basins (configuration C). The model performance was satisfactory for daily streamflow for configurations B and C and good for A. A better simulated large floods. C presented the best fit for monthly streamflow from May to July. Regarding the water balance, C showed higher values of surface runoff and lower values of total water yield than A and B. Bypass flow proved to be a valid option to improve the simulation of the hydrological processes in karst areas.

Modelling daily streamflow in a temporary karst river system: comparing three approaches using the SWAT model

Ricci, GF
;
Centanni, M;Gentile, F
2023-01-01

Abstract

This work tests different options for simulating hydrology in basins with karst areas. The Soil and Water Assessment Tool (SWAT) model was applied to the Canale d'Aiedda (Puglia, Italy), a Mediterranean temporary karst river basin. Different basin delineations and model parameterizations were adopted that include: (i) cutoff of the karst areas (configuration A); (ii) basin set-up including the karst areas (configuration B) and (iii) model parameterization considering a bypass flow in karst sub-basins (configuration C). The model performance was satisfactory for daily streamflow for configurations B and C and good for A. A better simulated large floods. C presented the best fit for monthly streamflow from May to July. Regarding the water balance, C showed higher values of surface runoff and lower values of total water yield than A and B. Bypass flow proved to be a valid option to improve the simulation of the hydrological processes in karst areas.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/422237
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