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Temporal distribution of groundwater recharge, base flow and groundwater resources in selected areas of Czech Republic, focusing on quaternary fluvial terraces: comparison of different approaches
Šabatová, Kateřina ; Bruthans, Jiří (advisor) ; Nol, Ondřej (referee)
The aim of this thesis is to quantify temporal distribution of groundwater recharge, baseflow and groundwater storage, mainly in quaternary fluvial terraces in the Czech Republic by different approaches, compare the outputs and assess limitations of each of the methods. The methods used are saturated zone modeling using FEFLOW program, and soil-water deficit modeling to estimate recharge and consequently calculate groundwater storage and baseflow. For this purpose, a simple soil-water deficit model was developed and proved to give reasonable estimates of recharge, despite using only 3 optimization parameters. The model is designed for unconfined aquifers with slow runoff (hydraulic pulse propagation). Calibration of the models was performed by comparison of modelled water table to water table measurements by CHMI and others. One pumping test with observation well was performed to obtain storativity of aquifer, which suggested a semi-confined regime of the aquifer, explaining the difference between storativity obtained from pumping test and from modeling. Furthermore, baseflow estimates from DPV modeling were compared to baseflow obtained from hydrograph analysis, showing reasonable similarity.
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