Dynamics of the length of the channel network of elementary watercourses in the Upper Volga basin in the 21st century (on the example of the catchment basin of the Logovezh river)

Abstract

The article contains the results of researching of the dynamics of the length of the channel network of elementary watercourses within the territory of the catchment basin of the Logovezh river in the XXI century. The researched territory is located in the Upper Volga basin in the zone of mixed coniferous-deciduous forests and characterized by high forest cover and swampiness. The research is based on the materials of the expedition work, carried out in the summer of 2021, the data of thematic maps and literary sources, processed using GIS. As a result of field researchs, the current position of the sources of elementary watercourses has been established, the indicator of the change in the length of their channels in the XXI century has been calculated. The fact of both increasing and reducing the length of the channel network of elementary watercourses with the predominance of their reduction processes has been established. Against the background of the restoration of the landscapes of the researched territory, there is a partial increase in the length of the channel network of elementary watercourses.