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The paper presents the results of the water quality of the St. George branch, one of three Danube River distributaries, using the combined physical and chemical analyses from June 2017. Three cutoff meander reaches (the Mahmudia, Upper Dunavat and Lower Dunavat meanders) were selected to assess the water ecological state. The cut-offs of the meanders by navigational canals since 1984-1988 caused significant changes in the distribution of the water discharge. Water samples were acquired throughout several cross-sec...

The study presents a detailed analyse of the morpho-dynamic processes of the main two bifurcations of the Danube River within its delta, at Ceatal Izmail and Ceatal St. George. The first bifurcation of the Danube, called Ceatal Izmail; here the river divides into two distributaries: a northern one, the Chilia (Kilia), and a southern one, the Tulcea. Forking to the right at Ceatal Izmail (Mile 43), the Tulcea distributary stretches further to 17 km to the second main hydrographic knot Ceatal Sfantu Gheorghe (St. Ge...

Heavy mineral concentrations formed in fluvial deposits present the signature of the mineral provenance and of the hydraulic sorting during transport and accumulation. The sedimentary discharge of the Danube River has been preferentially deposited due to the mineral physico-chemical properties, such as size, morphology and density, as well as local hydrodynamic factors. Besides these natural aspects, the recent modifications of the Danube and its deltaic branches are associated with a significant remodelling of th...

Taking into account the sedimentation features since the last 5 decades, considerable anthropic modifications on the Danube channel are present, as the debris composition varies concerning the proportion of terrigenous minerals, lithoclasts, bioclasts and organic matter. Since the 7th decade of the last century, marked by the construction of most hydrological power plants on the Danube, Olt, Jiu, Cerna and other major rivers, a significant change of the sedimentary volume brought downstream by the Danube is assume...

The coastal retreat in touristic areas concerns many sectors along the Romanian Black Sea shore; it usually requires programmes for beach nourishment, and consequently, large amounts of proper sand are necessary to be available for such activities. In order to minimize the effort for searching offshore sand, we conducted seismo-acoustics researches and some other archived data have been used during these researches, both for planning the sea works and during the integrated interpretation of the data. The results o...