Further, believe it or not -- not all rivers in this world have water. This is especially so in some deserts.. however, in the Elqui Valley area quite a few rivers are but dry riverbeds, actually. All year.
Now let me quote the Wikipedia a little bit:
http://en.wikipedia.org/wiki/Wadi wrote:Wadi (Arabic: وادي wādī; also: Vadi) is the Arabic term traditionally referring to a valley. In some cases, it may refer to a dry riverbed that contains water only during times of heavy rain or simply an intermittent stream.










