Consider the Black Canyon of the Gunisson, Glen Canyon, Marble Canyon and the Grand Canyon.
A river system that operates inside a drainage basin. A drainage basin is the area of land drained by a river and its tributaries.
The area drained by a river and its tributaries.
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A river basin is an area of land drained by a river and its tributaries.
headwaters
An area of land that drains to one river (or a river and its tributaries) is a drainage basin or watershed.
delta:)
There are only a few types of canyons. These are river canyons, mountain canyons, and canyons that were formed by weathering and erosion. +++ Very few types indeed. One in fact! All canyons are formed by weathering & erosion; and all are or were river canyons irrespective of mountains. The requirements for a canyon or gorge to form are a high plateau catchment area feeding a large river for sufficiently long for it to cut back from a steep rim.
I think you mean the source of a river, which is usually in the mountains.
I think you mean the source of a river, which is usually in the mountains.
a watershed
The Amazon river.