Question

what is a dam ? How do they help in maintaining water levels ?

Answer 1

Hey there!!
A dam is a barrier that stops or restricts the flow of water or underground streams.
Dams are useful because
They help people by reducing or preventing floods. During times of excess water flow,dams store water in thereservoir; then they releasewater during times of low flow, when natural flows areinadequate to meet waterdemand. When engineers design and maintain dams,they consider all these purposes.
Hope it helped u
plz mark as brainliest

Answer 2

Here is your answer:

Dam is a barrier across flowing water that obstructs, directs or retards the flow, often creating a reservoir or a lake.

HOPE IT HELPS YOU.