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The present material demonstrates appliance of regional studies on the area of Central Danube Plain in Bulgaria for determination the characteristic maximum flows at nonobserved river sections with focusing on for flood risk areas. River flow is characterized by annual variability in maximum runoff caused by climatic factors and anthropogenic impacts. For this reason, in most cases, information from hydrometric stations cannot be used directly. One of the main tasks of hydrological research is the transfer of info...

The study is focused on statistical analysis of river discharges. The registered river flow regime and hydrological characteristics of Yantra River are investigated. Yantra watershed is situated in North Bulgaria and belongs to Danube river basin Directorate. The current study is focused on the low flows. Thirteen hydrometrics stations located in the watershed are available for the investigation. Data used are from monitoring network of the National institute of meteorology and hydrology, Bulgaria. The flow durati...