FORMATION OF ION COMPOSITION OF THE BARGUZIN R. WATERS (LAKE BAIKAL BASIN) UNDER THE CONDITIONS OF SALINE LANDSCAPES
The results of ion composition of the Barguzin R. waters during periods of different water content and assessments of hydrological factors of water flow self-purification are presented. It is shown for the first time that realization of self-purification potential of the river increasing with water discharge increase is limited by income of mineral matter from salt lakes and saline lands of lacustrine-alluvial plain occupying a considerable part of Barguzin Depression situated in middle part of the river current. Expansion of saline landscapes in the depression is due to its rift origin, seismic activity, abundant outcome of underground waters and arid climate. Supporting influence of Shaman lip near Barguzin village results in large-scale depression waterflooding during high water content and in intensive salts washing out of its territory. Particular environmental conditions in the river basin determine as well the peculiarities of formation of ion composition of the Barguzin R. waters differing from classic viewpoints concerning the decrease of rivers mineralization at their outflow increase.