The answer to the given question is higher. Where human engineering has deepened and narrowed rivers, flood crests are commonly higher than in nonengineered sections.
This may occur in flash flooding. Flash flooding is a type of flooding that happens in a short time (usually less than six hours) after a precipitation event. Mostly, this is caused by heavy or excessive rainfall and occurs in areas near rivers or lakes, but this also can occur in places with no water close by.
Flash floods occur in rural and urban areas. When more rainfall falls in an area than the ground can absorb, or it lands in areas with a lot of impermeable surfaces like concrete and asphalt that stop the ground from absorbing the precipitation, the water can rise very quickly.
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