NCERT Solutions for Class 5th The World Around Us Chapter 2 Problems after a dam is built — Write

Book page 27 Updated on2026-09-19

Q1.
What problems can arise after a dam is built? How can they be solved?
Answer

The main problems are: land and forest go under the reservoir, families lose their homes, animals lose their home, the river below the dam gets very little water, and fish can no longer swim up and down the river. Each of these has something that can be done about it.

Problem after the dam is builtWhy it happensHow it can be solved
Villages and farms are floodedThe reservoir spreads over the land beside the riverGive every family a proper new house and equal farmland before the water rises, near their old area, and fair money for what they lost. Move them early, not at the last minute.
Forests are lostThe trees go under the waterPlant a new forest of the same size somewhere near, and protect it. Keep the reservoir as small as it needs to be.
Animals lose their homeTheir feeding and resting grounds are drownedKeep a protected forest and safe animal paths around the reservoir, so wildlife can move to new ground.
The river below the dam almost dries upMost of the water is held back by the wallLet a fixed amount of water out from the dam every day, all year. The river below needs water to stay alive.
Fish cannot swim past the wallThe wall blocks their path up and down the riverBuild a fish ladder — a set of shallow steps of water beside the dam that fish can climb.
Children lose their school and friendsThe whole village is shiftedBuild the school, the health centre, the road and the water supply in the new place first, before the families move.
The reservoir slowly fills with mudThe river drops the mud it carries as soon as its water stops movingPlant trees on the hills upstream. Trees hold the soil so less mud reaches the reservoir.
Not enough water for the town far downstreamEveryone wants the stored water at the same timeFix a clear sharing plan — how much for farms, how much for homes, how much for the river — and follow it.
Why the problems are worth solving, not just accepting: The dam is built so that many people can have water in the dry season. It is not fair if a few families pay the whole price for that. A good dam project plans for the people and animals it displaces before the first stone is laid — not afterwards.
Remember what the river says: “When you open a tap, it is hard to imagine the journey that water has taken and the many sacrifices that were made so you could have it.” That is why she asks us never to waste it.
Was this helpful?