Modeling interbasin groundwater flow in karst areas: Model development, application, and calibration strategy

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Original languageEnglish
Article number104606
JournalEnvironmental Modelling and Software
Volume124
Early online date16 Dec 2019
Publication statusPublished - Feb 2020

Abstract

Karstification is considered as one of the most common reasons for interbasin groundwater flow (IGF). IGF in some karst areas could be significant such that it must be accounted for in hydrologic modeling. In this study, the Soil and Water Assessment Tool (SWAT) was modified to explicitly account for IGF in karst areas. The modified model uses two conceptual models to simulate hydrologic processes in karst and non-karst regions. The modified model was applied in the karst-dominated region in the southwest Harz Mountains, Germany. Multisite streamflow data and satellite-derived actual evapotranspiration (ETa) were used for model calibration. Results show that (1) the modified model can be satisfactorily calibrated and validated for streamflow and ETa (2) the model performance for ETa and streamflow at some gauging stations are highly correlated, and (3) the use of satellite-derived ETa does not affect the model performance.

Keywords

    Calibration, Interbasin groundwater flow, Karst, Modified SWAT, Satellite-derived evapotranspiration

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Modeling interbasin groundwater flow in karst areas: Model development, application, and calibration strategy. / Nguyen, Van Tam; Dietrich, Jörg; Uniyal, Bhumika.
In: Environmental Modelling and Software, Vol. 124, 104606, 02.2020.

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T2 - Model development, application, and calibration strategy

AU - Nguyen, Van Tam

AU - Dietrich, Jörg

AU - Uniyal, Bhumika

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