THE ANALYSE OF THE FLOOD REGIME IN THE LOWER COURSE OF THE DANUBE RIVER FOR SECTOR GHIDICI-CORABIA

The Danube River and its affluents made a complex ecosystem which exiting natural balance equilibrium depends strongly on water courses, flow, sediment transport, water temperature and other physical variable with well defined role. The new policy concept "more space for rivers" of Europe meaning to give back river what "we've got" requires the harmonization of social and economical needs in order to preserve aquatic flora and fauna (conserving habitats-wetlands), mitigation of floods and retention of nutrients. The aim of the present paper is the analysis of the Danube flood area regime between Ghidici and Corabia in the wetlands restoration scenario of the agricultural polders (there are not dams and there is the possibility to re-establish the old Danube riverbed). For this it was made the 1D2D sketch (the use of the "Overland flow") that integrates hydraulic elements 1D of the analyzed area with the digital model of the land. The hydraulic description of the rivers discharge and the water management was made using SOBEK RURAL software package offering a high quality for the hydraulic modelling of the river flowing into low areas and in hilly lands of the irrigation and drainage systems. The scenarios were rolled for a minimum hydrological level of the Danube River (year-2003), medium (year-2004) and for the high level (year-2006). They made flood maps for low, medium and maximum levels of Danube River and was determined the flood degree on the analysed sector.