Assessment of state of aquatic ecosystems of Volynsk region as to the level of anthropogenic load

Abstract

The purpose. To assess anthropogenic load and to determine ecological state of basins of small rivers of Volynsk region. Methods. Calculation of anthropogenic load and classification of ecological state of basins of small rivers of Volynsk region is carried out with the help of logical-mathematical model «Basin of Small River» on 4 independent models of basic subsystems of water-collecting area: radioactive impurity of territory, use of lands, use of river flow, quality of water. Inductive factor of anthropogenic load is studied according to procedure of anthropogenic load and classification of ecological state of basins of small rivers of Ukraine. Results. On the basis of calculation of anthropogenic load and classification of ecological state of basins of small rivers they got results which testify to absence of «good» ecological state in basins of small rivers of Volynsk region. It was fixed that for 44% of the probed rivers ecological state matched to classification «changes are negligible», 33 % had «satisfactory» state, and 22% had « very bad » ecological state of basins. State «changes are negligible» had the rivers Tsir, Stokhod, Veselukha, Kormin; «satisfactory» — the rivers Vyzhevka, Turiya, Konopelka, and «very bad» — the rivers Chornoguzka and Lypa. River waters (even in boundaries of one native zone) were various enough on chemical content. It was caused by physiographic features of their formation and factors of economic activities of people. Conclusions. It is established that general state of basins of small rivers of Volynsk region as a whole is satisfactory. Assessment of anthropogenic load on water-collecting area is very important, first of all, for formation of nature protection activity within the limits of river drainage area.