Question

Dams are designed to reduce flooding by select one:

a. Enrapping sediment behind the dam so it can't be deposited downstream

b. Increasing the downstream velocity of flood water

c. Protecting river banks from erosion

d. Providing storage for flood wate

Answer 1

Hey buddy

the correct option is 'a'

Answer 2

Dams are designed to reduce flooding by d)providing storage for flood water.

Purpose of dams:

Whenever water reaches more than the threshold level, the dams hold and store the excess water and prevents it from flooding into the household area.

Mechanism of dams:

• Dams, especially flood control dams like flow-through dams are constructed in a way such that their spillway (opening) is as the same level as the riverbed.
• This facilitates normal river flow during the absence of excess water. But when there is excess flow of water, the dam gets filled up thus preventing the excess flow of water which causes flooding.
• Once the water is collected in the dam, the water will be directed towards other means for release such as river or elsewhere for various uses.

Thus dams secure a protective mechanism for the safeguard of human living and protection of agricultural farmlands from getting damaged from the flooding.