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Causes of Floods - Coggle Diagram
Causes of Floods
Rainfall
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The greater the three characteristics, the greater the chance of a flood occurring in a particular area
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Storms with high intensity and prolonged rainfall (such as tropical storms) bring heavy rain and strong winds. Tropical storms develop into tropical cyclones (hurricane or typhoon)
Snowmelt
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During winter, ice and snow form on the ground and on the mountains. When spring arrives, the temperature rises and they melt
The snowmelt flows over the land into rivers, increases the amount of water in the river, and causes the river to overflow its banks and flood the surrounding areas
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Storm surge
Sudden rise of the sea level in which water is piled up against a coastline beyond normal high-tide conditions
During a storm, strong winds push water towards the coast and create huge waves, giving rise to a storm surge
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