Average long-term background contents of chemical elements and organic substances in the flows of the natural component of the “Suspension of rivers” environment flowing into Lake Baikal reservoirs

Abstract

The physical and chemical state of the waters of Lake Baikal and the flows of the natural component of the environment flowing into and out is one of the most important elements of the chemical interaction of lake water substances with the environment. To study the natural regularities of the distribution of matter in the “substances of Baikal waters – substances of the flows of the natural component of the environment” megasystem, it is necessary to know the background components in the substance of the flows and their amount. The average long-term content of chemical elements and organic matter was estimated in mg/l. The method for calculating average long-term contents (mg/l, %) of chemical elements and organic (Na+, K+, Ca2+, Mg2+, Al, Si, Mn2+, Fetot, SO42-, HCO3-, Cl-, NO3-, PO43-, H+, O2, As, B, Cr, Cu, Cd, Hg, Pb, Sr, Zn, Co, U, V, Br, Rb, Mo, Corg, Norg, Porg, Sorg, CO2, Ti) in natural component flows environment “suspension of the rivers” flowing into the Southern, Selenginsky, Middle, Northern reservoirs of Baikal was developed. The results of analysis of the chemical composition of suspended substances in rivers for 1976-2001 were used. Natural indicators of the contents of chemical elements and organic matter in the suspended substance of rivers are important for comparative assessments, especially under the increased anthropogenic load. The data are necessary for assessing the scale of river chemical input with river suspension into the reservoirs of Baikal and calculating the contribution of the natural environment flows “River suspension” to the chemical balances of the lake reservoirs.