Question

A ____ is a wall built across a river to block the flow of water

Answer 1

Answer:

DAM

Your answer is DAM

DAM

Answer 2

A _dam___ is a wall built across a river to block the flow of water.

Dam is a wall that is built on the rivers to restrict the flow of the water.

Human beings seek to build dams because because dams acts as water reservoirs. They are useful in releasing water in a controlled way, thus floods can be avoided. Moreover, hydroelectricity can be produced from this stored water. Helpful in irrigation process due to controlled release of water. Now-a-days these reservoirs of water are also utilized in aquaculture practices.

It is also used in equal division of the stored water. The  main purpose of the dam is retaining water.

ADVANTAGES :

◾Helps in irrigation.

◾Can control flood.

◾Act as a water reservoir.

◾ Can be home for aquatic species.

◾ Help in producing hydroelectricity.

DISADVANTAGES :

◾Over flow can cause flood.

◾ Needs a large area of land that makes local people homeless.

◾ A large area become uncultivated.

◾ Hazard to aquatic animals.

◾ Takes huge amount of money in construction and maintenance

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