Wadi
river valley, especially a dry (ephemeral) riverbed that contains water only during times of heavy rain
A Wadi is usually a valley, sometimes the bed of a river. The river that is part of the wadi only has water after heavy rain. Staying in a wadi can be a danger to life. This is because the water in a wadi can rise very quickly. Canyon is another name for it, used in other countries.
![](http://178.128.105.246/cars-http-upload.wikimedia.org/wikipedia/commons/thumb/0/05/Wadi_Oman.jpg/220px-Wadi_Oman.jpg)
![](http://178.128.105.246/cars-http-upload.wikimedia.org/wikipedia/commons/thumb/8/81/NachalParan1.jpg/220px-NachalParan1.jpg)