Simulation of groundwater regime and quantification of groundwater balance by means of hydrodynamic analysis: Case of open-cast mine 'Jakovačka Kumša'

Abstract

Hydrodynamic analysis was used as the methodological approach to simulate the groundwater regime and quantify the groundwater balance in the extended area of the open-cast mine 'Jakovačka Kumša'. The study area includes a part of Belgrade Groundwater Source, located along the Sava River, in the immediate vicinity of the mine. Sand is excavated there and used as construction material. The paper analyzes and synthesizes data on local geology and hydrogeology, and portrays a three-dimensional hydrogeological model of the study area. The hydrogeological model is transformed into a hydrodynamic model applying the numerical method of finite differences and the Modflow software code. The modeled area and time interval are then discretized by importing the hydrogeological parameters of the porous medium and specifying the initial and boundary conditions of the model. The paper also includes the results of hydrodynamic modeling of the aquifer regime in the form of piezometric-head distribution charts, as well as the groundwater balance. The 3D hydrodynamic model set up in this manner constitutes a basis for hydrodynamic prognostic calculations and assessment of sand mining impact on groundwater quality in that part of Belgrade Groundwater Source.

Keywords

• hydrogeological model
• hydrodynamic model
• groundwater source
• numerical method of finite differences
• Modflow