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The paper focuses on seal defect of dam system of an impoundment with deposition of calcareous sludge. The seal defect of the impoundment dam system, consisting of a homogeneous ground dam, occurred due to its underflow by desludged water. This paper lists causes of the underflow at the dam system, based on analysis of the original engineering-geologic survey, construction method of the dam body, floating method at the impoundment and additional engineering-geologic survey. The primary cause of the defect is prese...

River flash floods and floods are natural events, which are part of the normal regime of the water leakage of a fluvial organism. Depending on the generating causes, they have a different size and a certain frequency of occurrence in time. The target area of the present study is the Sireasa area in the Danube Delta. In that place, a breakage may occur any time in the defensive dam surrounding the enclosure. This is due to the phenomenon of settlement traveled over time, or due to the possibility of occurrence of t...