Why Do Floods Occur in Some Places?

Floods often occur in rainy summer and autumn. Sometime, when it rains a lot in one place for several days, the rain water will all flow into the rivers. When the rivers cannot take so much, water at onetime, the water will rise and flow out of the banks to destroy the dykes and dams. This is flood. Floods are a natural disaster and bring pain and

damage to people.

To prevent floods, trees are planted on mountains and water conservation projects are built. When it rains heavily, trees in the mountains can prevent the soil from flowing into the river and thus decrease the damage of the flood.