Question

When dams are built large areas behind them are flooded, and the flows of water downstream are changed too. These can cause other environmental, and human, problems. Try to think of at least two.

Answer 1

Answer:

Land and water are ecologically linked in a natural system called a watershed. From the smallest droplet to the mightiest river, water works to shape the land, taking with it sediment and dissolved materials that drain to watercourses and, in most cases, eventually to the sea. So, too, is the river a product of the land it inhabits––the type of rock and soil, the shape of the land, and the amount of vegetation are some of the factors that determine the river’s shape, size and flow.

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