THE SECTOR OF FLUVIAL LIMANS IN THE SOUTHWEST OF DOBRUDJA
– GENESIS, MORPHOGRAPHIC AND MORPHOMETRIC FEATURES
ROMANESCU GHEORGHE, PURICE CĂTĂLIN
ABSTRACT. - The sector of fluvial limans in the southwest of Dobrudja – genesis, morphographic and morphometric features. The fluvial limans in the southwest of Dobrudja are the most typical forms of this kind found exclusively on the Romanian territory. Based on the morphometric records and on the interpretation of the geological deposits, the aim of this study is the genetic exploration of the lake within the southwest of Dobrudja. Throughout time, they have been interpreted as fluvio–maritime or even fluvio–lacustrine limans. The altimetric and granulometric records and their shape include them in the category of typical fluvial limans. Their subsequent evolution has led to significant clogging and to a decrease in the depth, caused by the strong erosion specific to excessive continental climate and to inadequate farming. The most interesting erosion processes – concerning the current shore – are governed by suffusion and lake erosion (through waves). The superficial deposits – loess and of a loessoid type – have a NW–SE wind-driven nature, just like those in Bulgaria; this is why they have managed to create accumulation levels included in the category of “constructed rasa”.
Keywords: fluvial limans, genesis, current geomorphologic processes, loessoid deposits, suffusion