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Human activity can contribute to the size and number of floods in many areas. Vegetation, such as trees and grass,protects the ground surface from erosion by taking in much of the water that would otherwise run off. Where this natural ground cover is removed, water can flow more freely across the surface. as a result the likelihood of flodding increases. Logging and the clearing of land for africulture or housing development can increase the volume and speed of runoff, which leads to more frequent flooding. Natural events, such as forest fires, can also increase the likelihood of flooding

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Q: How human activities can affect the size and number of floods?
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