Закономірності зміни макрокомпонентного хімічного складу вод ріки Білий Черемош

Abstract

V. V. Karabyn, Lviv State University of Life Safety, Lviv, Ukraine, vasyl.karabyn@gmail.com THE REGULARITIES OF CHANGE IN THE MACRO COMPONENT CHEMICAL COMPOSITION OF THE BILYI CHEREMOSH RIVER WATERS. The research results of the changes evaluation in the macro component chemical composition of the Bilyi Cheremosh River surface waters due to natural and man-caused factors are presented in the article. The research object the Bilyi Cheremosh River is the right source of the Cheremosh River, the waters of which flow into the Prut River and further into the Danube River. It was established that the drilling fluid used in drilling of the upper part of section had a mineralization of 7,8 g/dm3 and contained ions of sodium and potassium in quantities of 2218 mg/dm3 , calcium – 268 mg/dm3 , magnesium – 96 mg/dm3 , chlorine – 1896 mg/dm3, hydro carbonate – 2928 mg/dm3 and sulfate ions – 383 mg/dm3 . Minor effect of the oil and gas well drilling on the surface water macro component composition, which is related to the water mineralization increase and the content of ions of sodium, potassium, chlorine and sulfate ions was found. The change in the macro component waters composition related to the geological structure of the investigated area was substantiated. Particularly, waters of the Bilyi Cheremosh River within the Chornogirskyi nappe have hydrogen carbonate magnesium-calcium composition with the mineralization of 0, 26–0, 33 g/dm3. The Chornogirskyi nappe is the continuation of the Audia nappe in the Romanian Carpathian Mountains and within the research surface area it is composed of siliceous sandstone, argillite and aleurolites of the Lower Cretaceous Shypotska Suite. Further down the stream within the Krosnenskyi and Skybovyi nappes the water mineralization increases to 0, 39 g/dm3 primarily as a result of the increase in the concentration of calcium ions and hydrogen carbonate. The chemical composition change of waters is caused by the presence of calcareous flysch with the solid horizon of the striated limestone of the Paleogene period in the strata of the Krospenskyi and Skybovyi nappes.