Heavy Minerals Discharged in the Black Sea Basin by the Danube Branches

The terrigenous minerals discharged in the Black Sea basin by the Danube were investigated into the sediment of Tulcea, Sulina and Sf.Gheorghe branches. The discriminative studies of the fine sands in the superficial bottom sediments and in the saltation bed-load indicate that the velocity of the sediment movement is different on the branches. The transportation and sedimentation of the terrigenous material respect the general rule of sedimentology in branches, and meanders. However, the cut-off channels changed the natural sedimentation. The hydrotechnical work generating sediment unbalance on the Danube and Danube Delta determined an erosion of the river bed.