drainage-area

A river's drainage-area collects water from many smaller streams.

Definition

1. Noun:
   • A geographic region drained by a river or river system: "drainage-area" refers to the total land area from which water flows into a particular river, lake, or reservoir. It is also known as a watershed or catchment basin.

Usage Examples

• (The land region that contributes water to the Amazon.)
• (Construction within the watershed may pollute the water source.)
• (They analyze the land area to understand water runoff behavior.)

Advanced Usage

• "Drainage-area boundary": the line separating one drainage-area from another, often determined by topography.

  • The ridge forms the natural drainage-area boundary between the two valleys. (The high ground divides the water flow into separate basins.)

• "Drainage-area ratio": a comparative measure used in hydrology to assess water yield relative to area.

  • The drainage-area ratio helps engineers estimate river discharge. (The proportion of area to water volume is calculated.)

Variants and Related Words

• Drainage basin (n): a synonym for drainage-area, emphasizing the basin-like shape of the region.
  • The Nile's drainage basin spans multiple countries. (The entire land area that drains into the Nile.)
• Catchment area (n): another term for drainage-area, often used in water management.
  • The reservoir's catchment area is protected from deforestation. (The area that collects rainwater for the reservoir.)

Synonyms

• Watershed: the land area that channels rainfall and snowmelt to creeks, streams, and rivers.
• River basin: the entire region drained by a river and its tributaries.

Related Idioms

• (No common idioms exist for this technical term.)