In the article the main factor affecting water resources – irrevocable water consumption in the main river channels and administrative regions of the Republic of Kazakhstan, the degree of its impact on water resources is considered. Quantitative assessment of water resources use was carried out on the basis of data analysis of the statistical form of the departmental statistical observation 2-TP (water farm) and basin inspections. The most complete annual data are available only since 1992. For earlier years, water consumption accounting is not systematic and data are sometimes incomplete and contradictory. In this regard, this study uses data for the period 1992-2015. Anthropogenic changes in river flow at reference points in the main river channels draining the waters of a certain water collection were determined, channel water balances were compiled, transformations of water balance elements in each section were studied and compared with real water-intake facilities, and the share of irrevocable water consumption in certain sectors of the economy was determined. Using data on water consumption, the impact of water consumption on water resources was assessed by comparing the water resources available in the region with the volume of water used according to the so-called water load criterion. It is characterized by the capacity factor of water resources Ccap, equal to the ratio of the percentage of total water consumption to renewable water resources. This assessment was carried out for each WMB, as well as for all administrative regions of Kazakhstan.


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