SOURCES OF CHEMICAL ELEMENTS IN THE SNOW COVER IN THE SHORE ZONE OF THE SETTLEMENT OF LISTVYANKA (LAKE BAIKAL)
E.P. CHEBYKIN1,2,3, YU.A. DAMBINOV1, O.A. KHAKHURAEV1, A.N. SUTURIN1,3
1Limnological Institute, Siberian branch, Russian Academy of Sciences, 664033, Irkutsk, ul. Ulan-Batorskaya, 3, Russia
cheb@lin.irk.ru
2Institute of the earth’s Crust, Siberian Branch, Russian Academy of Sciences, 664033, Irkutsk, ul. Lermontova, 128, Russia
3Irkutsk Scientific center, Siberian Branch, Russian Academy of Sciences, 664033, Irkutsk, ul. Lermontova, 134, Russia
san@lin.irk.ru
Keywords: многоэлементный ИСП-МС анализ, снеговая вода, поверхностный сток, Южный Байкал, ис точники загрязнения, экологический стресс, multi-elemental ICP-MS analysis, snow water, surface drainage, South Baikal, pollution sources, ecological stress
Abstract
The distribution of major and trace chemical elements in the snow water of the cover has been studied in the near-shore zone of the settlement of Listvyanka (South Baikal) along Baikal high road. It is established that the elemental composition of snow is governed by local natural and anthropogenic pollution sources influencing, to a different extent, the sites of the study area. The study did not reveal any influence of the pollutants air transport from the Irkutsk-Cheremkhovo industrial hub ac cording to indicative elements is not detected. The main pollution factors are the roadbed, exhaust gases, smoke emissions from boilers and ovens in private houses. The markers of pollution sources can be arbitrarily divided into eight groups. According to the degree of mineralization and elemental composition, the samples used in the study are divided onto three types: clean snow (on the Lake Baikal shore at the beginning and at the end of the settlement more than 10 m from the roadbed), moderately polluted snow (along the entire length of the settlement 10-40 m from the roadbed) and dirty snow in the immediate vicinity of the roadbed (less than 10 m) and/or of the roadside cafe. The maximum contribution from chemical elements in the polluted melt waters to the mean annual balance of the surface subsurface flow is calculated. It is shown that the input of toxic elements and of elements favoring eutrophication with polluted melt waters is present in insignificant amounts when compared with the surface and subsurface flow; hence, it cannot serve as the determining factor for the emergence of the ecological crisis at Baikal in this area.
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