Delta loss

Some of the most productive land on earth is contained in river deltas and they all will be lost in the next few decades as oceans rise everywhere. For a preview of what delta loss will look like, look no farther than the Nile delta. Because of the Aswan High Dam, less silt is being deposited throughout the Nile valley. And that is most obvious in the Nile delta where seawater encroaches on productive farm land and renders it unusable before it erodes into the sea.