What term refers to the entire area drained by a river and its tributaries?

What term refers to the entire area drained by a river and its tributaries?

• A. Catchment
• B. Watershed
• C. Drainage Basin
• D. Confluence

Answer: (C)

The main idea here is understanding how a river collects water from its surroundings. The term that refers to the entire area from which all rainfall and groundwater eventually flow into the river and its tributaries is the drainage basin. This zone is bounded by topographic divides, the high ridges that separate one river system from another, and it includes all streams, tributaries, lakes, and even groundwater that feed the main river. A confluence is simply where two streams join, not the area they drain. Catchment or watershed can be used in some regions, but the drainage basin specifically describes the full geographic area feeding the river system.

The main idea here is understanding how a river collects water from its surroundings. The term that refers to the entire area from which all rainfall and groundwater eventually flow into the river and its tributaries is the drainage basin. This zone is bounded by topographic divides, the high ridges that separate one river system from another, and it includes all streams, tributaries, lakes, and even groundwater that feed the main river. A confluence is simply where two streams join, not the area they drain. Catchment or watershed can be used in some regions, but the drainage basin specifically describes the full geographic area feeding the river system.