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All About Floods

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All About Floods - Lesson Summary

Flooding damages crops and contaminates sources of fresh water thus leading to shortage of food and drinking water.

Apart from damaging life and property, floods can also lead to epidemics.

Any flood is preceded by a threat period known as the Probability Period, which allows the authorities to issue warnings and plan evacuation.

Floods occur when land gets submerged under water due to various causes like excessive rain, overflowing rivers, increase in water in reservoirs, cyclones, tsunami, sea tides and melting of glaciers. Floods caused by cloud bursts, bursting of dams, or tsunamis are called flash floods. Any flood is preceded by a threat period known as the Probability Period. This allows the authorities to issue warnings and plan evacuation.

Artificial reservoirs should be built with sluice gates and sand bags should be used to block the flow of water. Low grounds or viaducts can be created to carry water in a certain direction or underground. Trees should be planted in the catchment areas to stop soil erosion.

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