This paper studies the dynamics of the Sulina branch mouth by analyzing the influence of human intervention on sediment deposition at the point at which the Danube river empties into the sea. The surface and volume of the bar and southern spit at the Sulina branch mouth are calculated for the first time using advanced techniques.
The methodology consisted in georeferencing and vectoring the maps produced by the European Commission of the Danube (ECD), followed by a morphometrical separation of the bar and southern spit in the resulting models (from a 5 m depth to the surface). The ECD performed the first improvement works in the Danube Delta; the role of the jetties was to exceed the length of the bar which, in its natural state, extended over the entire mouth. The highest bar development rate was recorded between 1920 and 1925, when the volume of sediments in front of the jetties reached ~2.5 mil. m3. After 1930, both the surface and volume of the sediment deposition rates sharply decreased, due to the change in jetty direction and intensive dredging at the mouth.
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