Процјена Квалитета Воде Водотока На Подручју Општине Мркоњић Град

Abstract

The paper presents the results of physical, chemical and microbiological analyzes of watercourses in the area of the municipality Mrkonjić Grad. Water samples were collected during 2014 at five locations: rivers Ponor, Zelenkovac, Sana, Medljanka and Crna rijeka. Based on physical, chemical and microbiological parameters, water of the river Ponor belong to the satisfying second class of surface water. Values of all observed general physical, chemical and sanitary-microbiological parameters indicated that the water of the watercourse Zelenkovac has exceptional quality. Only the values of electrical conductivity corresponded to the water of the second class, while values of all other parameters were within the limits for the first class of surface water. The river Sana at the sampling site due to slightly higher values of electrical conductivity, hypersaturation and abundance of some groups of microorganisms belong to the second class of surface water. The river Medljanka in all measurements had extremely high values of conductivity that corresponded even to the fourth class of surface water. The number of aerobic heterotrophs pointed to the water of the third class, while the abundance of other groups of bacteria was within the limits for the second class of surface waters. These four watercourses had a low concentrations of basic nutrients in the water, as well as relatively low values of the parameters which indicate loading of water with organic substances. The river Crna rijeka due to high values of conductivity, the concentration of suspended solids, BOD 5 value, as well as due to the abudance of isolated groups of bacteria belong to the third class, while very high concentrations of ammonia and nitrite nitrogen indicated even a fourth class of surface water. The largest anthropogenic impact of all analysed watercourses in the area of the municipality Mrkonjić Grad suffer rivers Crna rijeka and Medljanka, while watercourse Zelenkovac has water of exceptional quality that is safe for the water supply. Key words: water quality, physical and chemical analysis, microbiological analysis Сажетак У раду су представљени резултати физичко-хемијске и микробиолошке анализе воде водотока на подручју општине Мркоњић Град. Узорци воде прикупљани су током 2014. године на пет локалитета: Понор, Зеленковац, Сана, Медљанка и Црна ријека. Ријека Понор је и на основу физичко-хемијских и на основу санитарно-микробиолошких параметара одговарала задовољавајућој другој класи површинских вода. Вриједности свих посматраних општих физичко-хемијских и санитарно-микробиолошких параметара указале су на то да је вода Зеленковца изузетног квалитета. Само су вриједности електропроводљивости одговарале водама друге класе, док су вриједности свих осталих параметара биле у оквиру прве класе површинских