Question

When do reservoirs cause flood?

• A. When the water holding capacity is surpassed.
• B. When the water level is below the holding capacity.
• C. When the reservoir is completely empty.
• D. When there is a less rainfall.

Answer 1

The correct option is A When the water holding capacity is surpassed.

When heavy rainfall occurs, the water holding capacity of the reservoirs or water bodies like rivers, dams, etc. surpass their maximum holding limit. Therefore, the excess water is released into rivers ans streams. This leads to flooding of places close to the rivers and other water bodies.