Arroyo
we dont know
A water course; a rivulet., The dry bed of a small stream.
A dry river or stream bed prone to temporary flash floods in the Middle East is often called a 'wadi'.
A dry river or stream bed prone to temporary flash floods in the Middle East is often called a 'wadi'.
=A perennial stream or perennial river is a stream or river (channel) that has continuous flow in parts of its bed all year round during years of normal rainfall. During unusually dry years, a normally perennial stream may cease flowing, becoming intermittent for days, weeks, or months depending on severity of the drought.=
Wadi
It can be called a draw, a wash or a gulch.
1. The dry bed of a stream 2. Waste water 3. The erosion of sediment or sediment that has been eroded
Arroyo or Wadi. Coulee is more specific: coulee is a dry streambed; a small shallow ravine
A wash is another term for a gully, an arroyo or a wadi. It is a usually a dry stream bed in a desert formed by occasional heavy rains.
Dry bed or river bed