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The Ogosta river catchments is one of the main water systems in North Bulgaria. The present study focuses on the characterization and analysis of the chemical peculiarities of the water in the upper part of the catchment area of the Ogosta river. It is based on a series of chemical analyzes of water samples collected during field research in the river monitoring area. The results obtained from the four basic different control points taken during the study. The investigation includes field and laboratory research o...

The determination and modelling of the territory is common scientific instrument for presentation of the state of the nature and human systems. The present research is based on the morphological and hydrological peculiarities in the river catchment. It observed of the Danube coastal zone in Bulgaria sector of the river. The differentiation and determination of the coastal area is key element in the process of the management of the territory and development of the regions. The general results of the research are re...