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Karst aquifers on small islands—the island of Olib, Croatia

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Abstract

Water supply is a major problem in the Adriatic islands, especially during the summer tourism season, and represents a limiting factor to the islands’ further economic development. Much attention has been given to water supply solutions, primarily in terms of attempting to use the existing island water. Unfortunately, few islands have favourable hydrological conditions to accumulate significant quantities of surface water or groundwater. In the period from 2001 to 2004, investigations were conducted on many islands to define their own freshwater or partially brackish water resources since desalinisation technology could resolve a significant part of the water supply demand on small and distant islands. Due to the specificity and complexity of research in karst areas, the study was conducted in phases and included the geological and hydrogeological reconnaissance of the island, aimed at locating possible areas on the island where the necessary quantities of groundwater of adequate quality could be captured; a detailed hydrogeological mapping of the specified areas, geophysical investigation and test drilling; and, over several days, test pumping of the most promising borehole. One of the islands investigated was the island of Olib. The conducted surveys indicated that it is possible to pump about 3.5 L/s of groundwater from the karst aquifer of the island of Olib, which fully complies with the sanitary quality of drinking water.

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Authors and Affiliations

  1. Croatian Natural History Museum, Demetrova 1, Zagreb, Croatia

    Tatjana Vlahović

  2. Geoaqua d.o.o, Hanamanova 16a, Zagreb, Croatia

    Boris Munda

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  1. Tatjana Vlahović
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  2. Boris Munda
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Correspondence to Tatjana Vlahović.

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Vlahović, T., Munda, B. Karst aquifers on small islands—the island of Olib, Croatia. Environ Monit Assess 184, 6211–6228 (2012). https://doi.org/10.1007/s10661-011-2414-y

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