Abstract
The article presents the results of hydrochemical research conducted at the end of August 2014 and in spring 2013 in the northern part of Western Siberia. The research concerns unfiltered waters of small streams, medium-sized rivers, the Ob’ River and two large thermokarst lakes. A special mobile laboratory enabled the research team to conduct many on-site analyses several hours after the collection of samples. The results have been assessed in terms of their significance for the general quality evaluation of the examined waters and the nature of organic substances contained in the waters. Additionally, the paper discusses results of chemical and physical tests to evaluate the amount of organic substances. General features concerning the evaluation of organic compounds among different type of surface waters have been suggested on the basis of the studies.
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