engleski

Water quality evalution by index in Brčko Distrikt

The scope of the present study was to evaluate the quality of groundwater resources in Brčko Distrikt, based on index. During the five years period (2004-2008) different measurements of various indicators of the water quality were conducted on 61 groundwater sources. The obtained results of nine different selected indicators (dissolved oxygen, total coliform bacteria (MPN coli/100 ml), pH, biochemical oxygen demand, temperature, total phosphate, nitrates, turbidity and mineralization) have been used for the water quality index (WQI) calculation in this region. The quality of the investigated waters represented by the median of all medium values WQI from all locations on the yearly level shows the constant quality for the period of research ; the category “good” (WQI 70-90) was given. Beside this, the results have indicated that WQI of the mountain of Majevica was constant, 81, while the other analyzed groundwaters oscillated in the quality (WQI 70-84). The presented research shows that application of the WQI method may contribute to the complete picture of the groundwater quality condition with the trend analysis and interpretation of results with descriptive quality indicator.

water quality index ; groundwater

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