What is the name of the geographical area from which all precipitation flows into a single river system?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer
Drainage basin
Explanation
A drainage basin, which is also commonly referred to as a river basin, catchment area, or watershed, is the entire geographical area of land where all surface runoff from precipitation, melting snow, or ice converges and drains into a single central river network, lake, ocean, or other water body. The high ridges or mountains surrounding this area act as natural boundaries, directing all smaller streams and rainfall downward into the main river channel.
Other options are incorrect due to the following reasons. A plateau is a flat, elevated landform that rises sharply above the surrounding area on at least one side, which describes terrain shape rather than a water collection network. A waterfall zone is a localized section of a river system where flowing water drops vertically or near-vertically over a steep cliff face. An inland depression is a low-lying land area surrounded by higher ground that lacks a natural drainage outlet to an ocean or sea.
Key Points
Depending on geography and scale, a drainage basin is interchangeably called a watershed, catchment basin, or river basin.
The high geographical boundary ridge that separates neighboring drainage basins from one another is known as a drainage divide or a topographic divide.
A drainage basin essentially behaves like a giant natural funnel, gathering all precipitation that falls within its topographical boundaries and channeling it into a single system.
Important Questions and Answers
Question: What is the largest river drainage basin in the world by surface area and water volume?
Answer: The Amazon Basin in South America.
Question: What is the line or ridge called that separates one drainage basin from another?
Answer: A drainage divide.