Modeling of groundwater extraction from wells to control excessive water levels

Shenga, Zinaw Dingetu and Baroková, Dana and Šoltész, Andrej (2018) Modeling of groundwater extraction from wells to control excessive water levels. Pollack Periodica, 13 (1). pp. 125-136. ISSN 1788-1994

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Abstract

The overall purpose of this research was to model flow extraction from several groundwater network wells to control the excessive level of groundwater. The study was conducted in the Nitra Industrial Park, which is located in the northern part of the town of Nitra, where the confined groundwater table is situated very close to the terrain. The area of interest is a plain with a mean elevation of 140.0 m a.s.l. The groundwater can rise up to 140.5 and 143.0 m a.s.l. during the dry season, extreme climate conditions, or a flood wave in the Nitra River, respectively. In order to keep the level of the piezometric head below 140.0 m a.s.l. (as requested by the investor), there are already 38 wells realized around the area of interest with the proposed pumping rates. The numerical groundwater modeling was applied using the TRIWACO simulation package for the given hydrological, geological and hydro-geological conditions. The transient simulation takes into account a Q¹⁰⁰⁰ historical discharge in the Nitra River and its possible impact on the groundwater. The paper will present numerical modeling results on the design of a drawdown system to lower the groundwater level to an acceptable elevation as well as parameters and uncertainties for the design purpose.

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