a dale
Flood Plain
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A wide river valley is called a vale. In Scotland, a wide and flat river valley is also called a strath.
An ancient under sea valley carved in the ocean floor is known as a canyon, usually given the name of the contributory river on the land. such as the Hudson Canyon, or the Clutha Canyon.
Indus River Valley.
a mature river
A floor.
The Nile gets its name from the Greek word "Nelios", meaning River Valley.
Krishna
The Nile River Valley and the Indus River Valley.
A U-shaped valley, also known as a glacial trough, is a large valley with steep sides, and with a wide, flat valley floor. It is formed, as the alternative name suggests, by glacial activity in the area (i.e. it was formed by a glacier).
godawari river
There were snakes or water snakes near the river.
Because the river Nile flows through it.