A case study of the application of a numerical groundwater flow model for quantitative determination of groundwater resources protection areas
1998
Pokrajac, D. (Gradjevinski fakultet, Beograd (Yugoslavia))
The paper describes how ground water flow modeling can be used to determine the protection zone around a ground water intake. The first step is the development of a reliable ground water flow simulation model. Then, the actual pore velocities of the ground water flow should be determined by additional field investigations, and used subsequently for the computation of pathlines. Next, by visualizing the pathlines, the extensions of zones influenced by the individual wells are assessed, as well as the general flow directions and travel times. The isochrones around the wells can also conveniently be defined. Then, the potential sources of pollution are analyzed in the vinicity of the wells, and considering their position and type of pollution, criteria should be set for the definition of the protection zone. For instance, a criterion can be that the travel time must be longer than the duration of the characteristic (bio)chemical reaction of the process. After having adopted the criteria, the protection zone can quantitatively be determined by means of the numerical ground water flow model. A case study of such a computation of presented in the paper.
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