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JCI at a Glance References Selected Projects Study of the Belgrade Groundwater Source (Phase 2)
Study of the Belgrade Groundwater Source (Phase 2) PDF Print E-mail
alt Client: Serbian Ministry of Agriculture, Forestry and Water Management/Water Directorate, and the Building Land and Construction Directorate of Belgrade
Project Manager: Dr. Milan Dimkić, CE
Chief Analysts: Đulija Boreli Zdravković, MSc, CE; Dr. Milenko Pušić, CE; Dušan Đurić, CE; Tibor Slimak, GE; Vesna Obradović, BE; Anđelka Petković, ChE

The Belgrade Groundwater Source (comprised of 99 radial wells and some 40 active tube wells) is the largest of its kind in Serbia. The current rate of groundwater abstraction is 4.5 m3/s. The source lies along some 30 km of the left bank and 8 km of the right bank of the Sava River, and along the island of Ada Ciganlija.

The main objectives of this multiple-year multi-disciplinary study are to:

  • Identify the actual capacity of the source;
  • Study the causes of water-well ageing;
  • Propose an efficient plan for well regeneration and future use;
  • Study the status of and threats to the groundwater source in order to assist in the resolution of the conflict with the growing city and other users of the area.

Numerous investigations (hydrogeological, hydrochemical, microbiological), intensive groundwater and surface water regime monitoring, and several structural surveys were conducted in 2007, as part of Phase II of the Study. Gathered data were collated and assessed at the following levels:

  • Assessment of the suitability of well micro-locations (characterization of the water-bearing complex, hydrochemical conditions – total and dissolved Fe, the oxygen regime – dissolved O2 and redox potential, anthropogenic pollution indicators, and microbial activity);
  • Development of a regional hydrodynamic model of the aquifer (synthesis of available hydrogeological information and groundwater regime monitoring data);
  • Comprehensive analyses of groundwater flow from the river to the wells, and of the processes taking place along the way;
  • Diverse specialized analyses (e.g., correlation between the mineral composition of sediments and hydrochemical conditions);
  • Analyses of sediments removed from radial well laterals (composition and solubility in various reagents).

A special part of the Study focuses on the monitoring of regenerated wells, where new laterals were installed in 2006 and 2007 applying the Preussag method. These wells have been subjected to a special monitoring and assessment regime, to allow for the quantification of hydraulic losses at well laterals over time. A specially-developed software package, Lizza, is used to process the data. This software is extremely user-friendly with regard to setting full 3D flow boundary conditions, and offers a special option for line elements (well laterals).

Chemical test have revealed considerable differences between individual wells, even though the distance between them is generally not more than 400 m.

Synthesis of results on the characteristics of the micro location of wells

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