A significant element characterizing a lasting development in Braila Plain region, but also in any other similar area, would be an environment factor that is the water, with an increasing importance when considered against the high dryness background. Generally speaking, both the consumed water and the consumption structure reflect the quality and quantity of water resources and, implicitly, the economic potential of the region at issue. As for Braila Plain, here there is a paradox to be considered: even if the region is bordered by highly significant rivers (The Danube and Siret) with huge flows – not to mention here the salty water lakes or underground streams with a more or less drinking water – the need of drinking water becomes obvious, mostly in summer and autumn. The climate, morphometric and lithological conditions confer certain peculiarities upon the waters resources of the northern-eastern Romanian Plain. One can say about the Braila Plain hydrographical network that it is poor and this is due to the discharge, situated under the value of 1 l/sqkm, but also to the very low relief energy. The allochthonous Rivers: the Danube, Siret, Buzau and Calmatui are affected by the relief climate conditions and also by the size and the geographic position of the hydrographical basins.