Answer:

WADIS

Answer	Crossword Clue
WADIS	Dry riverbeds
WADIS	Dry Saharan streambeds
WADIS	Dry watercourses

WADIS	Ravines in North Africa.
WADIS	African river beds.
WADIS	Watercourses.
WADIS	Oases
WADIS	North African riverbeds
WADIS	Oases, at times
WADIS	Dried-up desert streams
WADIS	Arroyas

WADIS	African waterbeds
WADIS	Relatives of arroyos
WADIS	Desert gullies
WADIS	Intermittent streams
WADIS	Sinai streambeds
WADIS	Features of Syria and northern Africa
WADIS	African watercourses
WADIS	Dry gullies of Africa

WADIS	Dried-up riverbeds
WADIS	North African streambeds
WADIS	Some ravines
WADIS	Certain desert valleys
WADIS	African water beds?
WADIS	African ravines
WADIS	Usually dry gullies of Africa