| Summary: | Geographic information systems (GIS) are an effective tool for storing, managing and displaying spatial data. The application of GIS in water resources management is constantly increasing. In this regard, the purpose of this article is to study the morphological anthropogenic changes occurring in the surface water body BG2PR210R1005 (Devnya River after the village of Chernevo to the inflow in Provadiyska River). For this purpose, GIS was created, which includes aerial photographs (taken in 1942 and 1957), analog topographic maps 1: 5000 (1966 and 1987) and orthophoto maps (2006, 2011 and 2014), digital elevation model (DEM).As a result of the performed spatial analysis of the indicated sources, the anthropogenic factors and the morphological changes caused by them on the Devnya River after the village of Chernevo have been determined. In the course of the research it was proved that the river Hamam Dere (considered to be the beginning of the river Devnya) has no connection with the river Devnya. In addition, the Hamam Dere River is defined as a Heavily Modified Surface Water Body (HMSWB) only within the boundaries of a spring (Myziiska cheshma) to the Kairyaka area. The obtained results are important for the responsible institutions (Basin Directorate of the Black Sea Water Management Region) and the public.
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