Question

The role of a watershed is to _____.

A. purify water.
B. act as a drainage area.
C. collect fish from rivers and streams.
D. protect wetland areas.

Answer 1

The correct answer is B. acts as an drainage area.

A watershed is surface area on land where all the rain water collected and drained through a common point into a water bodies such as river, lake or stream. A watershed is also called a drainage basin or catchment area. Watersheds conserve water and make river, streams flow uninterrupted. It recharges ground water and provide dwelling place for wildlife and plants.

Answer 2

The right answer is B. act as a drainage area.

A watershed or watershed is the space drained by a watercourse and its tributaries. All the waters that fall into this space converge towards the same exit point called an outlet: stream, lake, sea, ocean, etc.

The watershed is bounded by a watershed that often corresponds to the ridge lines but not always. Generally a watershed develops beyond the ridge lines. A watershed is a divergent line of slopes. Rainwater on both sides of this line flows in two different directions, carrying with them dissolved or suspended elements such as sediments and pollution.