Of the 24 species of plants vulnerable to climate change, 20 species are hydro- or hygrophytic and will be threatened by declining water levels or even drying of water basins on certain sectors (depressions) or complete. The frequency of these adverse phenomena is represented by hydrological scenarios of the territory with precipitation, but the error range is quite high, because the phenomenon depends not only on the amount, frequency and intensity of precipitation, landform, etc., but also on floods caused by water from the Prut and Danube, dependent, in turn, on more difficult to predict regional processes (upstream rains, melting snow in the Carpathians, regulating the water level in the accumulation basins, especially Costești-Stânca, etc.).