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The Ob and the Lena Rivers are considered in the research. They are two biggest rivers of Russian Arctic and have the annual runoff 405 and 530 km3/year correspondingly. Analyse of multiyear data of Russian Hydrometeorological Survey (Roshydromet) and own measurements in the mouths areas allow to describe a tendency of water resource and water quality development in these regions according to climate change and human impact. Long-term river runoff and concentration of major and trace elements in water have been co...

The precipitation survey by modern techniques helps calculate the amount of rainfall in the catchment and save it in a digital format. This paper proposes the development of a GIS methodology for determining the input data or parameters needed for modelling the rain-drainage process in order to anticipate the amount of available leakage water and the integration of slopes leakage to estimate the magnitude of rapid floods that may occur. The data obtained from the rain-gauge stations in the Uz catchment are used in...