Abstract. Geographic Information System (GIS)and Geoportal with open access «River basins of the European Russia» were implemented. GIS and Geoportal are based on the map of basins of small rivers of the European Russia with information about natural and anthropogenic characteristics, namely geomorphometry of basins relief; climatic parameters, representing averages, variation, seasonal variation, extreme values of temperature and precipitation; land cover types; soil characteristics; type and subtype of landscape; population density. The GIS includes results of spatial analysis and modelling, in particular, assessment of anthropogenic impact on river basins; evaluation of water runoff and sediment runoff; climatic, geomorphological and landscape zoning for the European part of Russia. IntroductionCurrently, in Russia, there is no integrated geospatial database or geographic information system tied to the basins of small rivers. The urgency of creating such a complete coverage GIS that is capable to accumulate large volumes of spatial information on natural systems and integrated information on the state of small river basins is in relevancy of studying the results of increasing anthropogenic impact, as well as climatic changes observed in different landscape areas on basin geographic systems. The large region of Russia -its European part which is some 4 million square kilometres with the most part of population and industrial and agricultural potential of the country -is being fundamentally studied in terms of geographical analysis of minor river basins and river runoff while creating designated geographic information system (GIS) "River basins of the European Russia". The designed GIS is considered to be a base for modern data and knowledge on geographic, hydroclimatic, geoecological and other characteristics of natural resource potential of tens thousands river basins. The thematic information sources are the data from long-term monitoring's, Earth's remote sensing, and accumulated corpus of cartographic materials from state surveys. The GIS includes not only actual information, but also the results of its comprehensive spatial analysis and modelling, assessments of anthropogenic load on river basins, the results of studying the patterns of water runoff formation depending on the landscape and geographical conditions in the European part of Russia.The information accumulated in the GIS is located on the geoportal "River basins of the European Russia" with public (open) access, which will enable a wide range of representatives of a scientific community and experts in the field of environmental management and protection to obtain thematic

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Using the Volga (Privolzhskii) Federal District as an example, we offer the solution of such a currently central scientific and methodological problem as automated identification of the boundaries of basin geosystems under different landscape and geomorphological conditions in terms of multiresolution digital elevation models. The main stages of work are described, namely the development of the digital elevation model, its hydrological adjustment, identification of the boundaries of basin geosystems, and validity assessment of results obtained. The technique has been developed for constructing a hydrologically valid digital elevation model with the purpose of identifying the boundaries of basin geosystems.

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