Consider the following statements with reference to the rivers 1 Ephemeral rivers are those that hav...........

Geography and Environment World - Water Bodies

Consider the following statements with reference to the rivers:

1. Ephemeral rivers are those that have water in them throughout the year.

2. A river's catchment area refers to the region from which it collects water.

3. A drainage basin is a region that is drained by a river and its tributaries.

4. A watershed is the boundary line that separates one drainage basin from another.

How many of the statements given above are correct?

Only one

Only two

Only three

All four

Statement 1 is incorrect: According to the presence of water in river through the year, rivers are divided into two categories: (a) perennial rivers, which have water present throughout the entire year; and (b) ephemeral rivers, which have seasonal water presence.
Statement 2 is correct: A catchment is a region of land that gathers water during rainstorms, often enclosed by hills.The water finds its way into streams and into the ground as it travels across the terrain, eventually feeding the river.In periods of low rainfall, some of this water remains underground and gradually feeds the river.
Statement 3 is correct: An area that is drained by a river and all of its tributaries is known as a river drainage basin. Many diverse watersheds make up a river basin.
Statement 4 is correct: There is a drainage basin for each river.
A watershed divides two or more river basins from one another.