Magdalena Ujević

Marija Misilo

Petra Bajo

 

HIDROKEMIJSKE KARAKTERISTIKE KRÅ KIH VODA NA PODRUÄŒJU LIVNA, TOMISLAVGRADA, IMOTSKOG I TRILJA

 

DOI: 10.35666/28310438.2008.2.553

UDC: 911.2[556:574.57](497.6+497.5)

 

Abstract: Livno, Tomislavgrad, Imotski and Trilj areas belong to the Dinaric mountain region. The aquifers in the investigated areas are transboundary karst aquifers important for water supply, irrigation and electric power production. The aim of this study was to investigate hydrochemical characteristics of waters in these areas. Hydrochemical investigation can indicate water pollution as well as help in defining of litological characteristics of the water flow areas. Furthermore, some chemical parameters can be used as natural tracers for determining of water flow direction of the karst groundwaters. Water samples were taken from 11 springs and 1 ponor in October 2006. In December 2006 the samples were taken again from 7 springs. Physical and chemical parameters were tested: pH, temperature, electrical conductivity, total dissolved solids, major anions and cations, trace metals and TOC. The data were analysed for water types and hydrochemical characteristics using the QW_Chart and PHREEQC software. Tested waters are of Ca-bicarbonate type. They are lightly saturated to saturated with calcite and un sturated to lightly saturated regarding dolomite. Concentrations of trace metals, nitrate and sulphate are below maximal admissible level stated by EU Drinking Water Directive (98/83/EC). The sulphate concentrations of the waters in Livno area are higher than in the other investigated areas. Due to high heterogeneity of the karst aquifers more frequent and continuous investigation is needed to determine factors which control chemical water composition and their seasonal variations.

Keywords: karst waters, hydrochemical parameters, transboundary aquifers, Croatia, Bosnia and Herzegovina.

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