The delta lands are sinking

When a river flows it picks up all kind of debris from the act of running water over rock, subsoil and soil. Generally rivers deposit this debris, known as sediment, at their moths where they often form large deltas, like the Nile delta or the Delta of the Mississippi. Deltas are made up of many islands formed by the constant deposit of sediment, and they are kept in check by the natural action of the river which washes some of the delta land into the sea. Continue reading