| Popis: |
Karašica and Vučica small catchment is located in the Slavonian Podravina and is exposed to various sources of pollution. The aim of this work was to give an overview and assessment of catchment water quality based on the analysis of selected water physicochemical parameters according to the national regulations and laws. The focus was on year 2019 and 2020. Water samples were collected on a monthly basis, on the Vučica River at 21020 and 21007 location, and on the Karašica River at 21019, 21012 and 21021 location. pH value, biochemical oxygen demand (BOD5), chemical oxygen demand (COD), nitrogen and phosphorus compounds were analysed. The obtained results indicate a bad to very good water quality depending on the observed parameter and year. For example, for the year 2020 determined values of pH, nitrates and total nitrogen indicate a very good condition for both rivers, while ammonia content indicates good condition. Considering BOD5, Karašica has low to good water quality, while water quality of Vučica is good. Considering COD-Mn Karašica has good water quality and Vučica bad to good. On the other side, based on orthophosphates and total phosphorus, water quality of Karašica is good and Vučica very good. For a better insight regarding water quality, other parameters that could indicate the condition of a water body should also be included in the study. |
