Dissolved Organic Matters and Mineralization of River Water of Mountains with Tundra-Taiga Types of Vertical Zoning in Russia

Abstract

Space-time characteristics of dissolved organic matters (DOM), alkaline-acidic conditions (pH) and mineralization (∑m) of river waters of natural provinces and countries of mountains with tundra-taiga types of vertical zoning of Russia are analyzed. The study is based on the results of long-term experimental hydrochemical researches and observations on the network of Hydrometeorological Service. The reaction of river water of studied mountains is neutral (pH is from 6.5 to 7.0). Water mineralization in the main area is extremely small (less than 100 mg/dm3 ), in some natural countries and provinces increases to small. The river water of mountains with the West Siberian and East Siberian tundra-taiga zoning types is quite similar by average annual chrominance, by the content of dissolved organic matters and easily oxidable fractions, while these parameters for the river water of the pacific types mountains are at 1.5 times lower. Extreme average concentrations of humic and fulvic acids in the water of the rivers of these mountains are maximal in the mountain territory of the country.