Groundwater vulnerability map for the Ogosta River Basin, northwestern Bulgaria

Pages: 
pp. 59-67
Department of Hydrogeology, Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Department of Hydrogeology, Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Hydrogeology Laboratory, Institute of Water Problems, Russian Academy of Sciences, 119991 Moscow, Russia
Abstract: 

The present paper deals with evaluation and mapping of the intrinsic vulnerability for the Ogosta River Basin in northwestern Bulgaria. The protective cover and infiltration conditions (PI) method is used developed within the scope of COST 620 Project. According to this method, PI factors are evaluated and groundwater vulnerability map is prepared. Groundwater in the karst basins is the most vulnerable to pollution. The alluvial deposits are classified as moderately vulnerable. The loess cover provides effective protection of groundwater against pollution and thus the respective areas are low vulnerable to pollution. The Neogene limestones, sands and sandstones are moderately vulnerable. Possible removing of the soil cover would result in high vulnerability of the respective aquifer. The prepared vulnerability map may be used for groundwater resource protection and land use planning in the Ogosta River Basin.

Keywords: 

groundwater vulnerability, pollution, mapping, northwestern Bulgaria

VOLUME 38 (1-3)/December 2009

Geological Institute, Bulgarian Academy of Science, 1113 Sofia; Institute of Isotope Geochemistry and Mineral Resources, ETH-Zurich, 8092 Zurich
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Institute of Isotope Geochemistry and Mineral Resources, ETH-Zurich, 8092 Zurich
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Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Science, 1113 Sofia
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Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Science, 1113 Sofia
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Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Science, 1113 Sofia;
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Institute of Geology, Ural Division, Russian Academy of Sciences, 167982 Syktyvkar, Russia

Department of Geography & Climatology, Faculty of Geology & Geoenvironment, National & Kapodistrian University of Athens, University Campus (Panepistimiopolis), Zografou, ZC 15784, Athens, Greece
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Department of Dynamic-Tectonic-Applied Geology, Faculty of Geology & Geoenvironment, National & Kapodistrian University of Athens, University Campus (Panepistimiopolis), Zografou, ZC 15784, Athens, Greece
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Department of Geography & Climatology, Faculty of Geology & Geoenvironment, National & Kapodistrian University of Athens, University Campus (Panepistimiopolis), Zografou, ZC 15784, Athens, Greece

Institute of Botany, Bulgarian Academy of Sciences, Sofia 1113, Acad. G. Bonchev Str., Bl. 23
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Institute of Botany, Bulgarian Academy of Sciences, Sofia 1113, Acad. G. Bonchev Str., Bl. 23

Department of Hydrogeology, Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Department of Hydrogeology, Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Hydrogeology Laboratory, Institute of Water Problems, Russian Academy of Sciences, 119991 Moscow, Russia

Sofia University, Dept. of Geology, Paleontology and Fossil Fuels, 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria
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Sofia University, Dept. of Geology, Paleontology and Fossil Fuels, 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria