Which term is used for the geographic area that contributes water to a river system, including streams and groundwater?

Which term is used for the geographic area that contributes water to a river system, including streams and groundwater?

• A. Estuary
• B. Delta
• C. Confluence
• D. Drainage Basin

Answer: (D)

The main idea here is understanding what area feeds a river system. The geographic region that collects precipitation and channels water to the river network—including both surface streams and groundwater—is called a drainage basin (also known as a watershed or catchment). This area is bounded by drainage divides, the high ground that separates neighboring basins. Water from rainfall within the basin eventually makes its way into the river through surface flow or groundwater discharge, so groundwater is part of the basin’s contribution as well. This concept is different from an estuary (where a river meets the sea), a delta (the landform at a river’s mouth), or a confluence (where two streams join).

The main idea here is understanding what area feeds a river system. The geographic region that collects precipitation and channels water to the river network—including both surface streams and groundwater—is called a drainage basin (also known as a watershed or catchment). This area is bounded by drainage divides, the high ground that separates neighboring basins. Water from rainfall within the basin eventually makes its way into the river through surface flow or groundwater discharge, so groundwater is part of the basin’s contribution as well. This concept is different from an estuary (where a river meets the sea), a delta (the landform at a river’s mouth), or a confluence (where two streams join).