Consider the Black Canyon of the Gunisson, Glen Canyon, Marble Canyon and the Grand Canyon.
The Gila River flows into the Colorado River at Yuma, Arizona. This confluence is significant as the Gila River is one of the main tributaries of the Colorado River, contributing to its flow and ecology. The area surrounding the confluence is important for both natural habitats and human activities, including agriculture and water management.
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:)
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
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.