Causes of Droughts dams

Constructing a dam on a large river can help provide electricity through hydroelectric power and hold water in reservoirs to share to farmers and fro people to drink but they also drastically cut of the flow of rivers and can dry them up very quickly if not enough water is let through the dam wall.

The water level further downstream from the dam will drop.

This can leave an area in drought because the water feed which it was getting before has been blocked by a dam. For example the Aral Sea which has lost more than 25 metres of water since 1960 because of rivers which feed into it being diverted.

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