GEOLOGY

Detailed explanation-1: -Areas most susceptible to flash flooding are mountainous streams and rivers, urban areas, low-lying area, storm drains, and culverts.

Detailed explanation-2: -Floods Cause Sedimentation and Erosion Floodwater can also alter the landscape, for instance, by eroding riverbanks and causing them to collapse. As floodwater carries material from the eroded banks, it suspends sediment in the water, which can degrade water quality and lead to harmful blooms of algae.

Detailed explanation-3: -This article explores several kinds of surface processes: stream-related processes, including flooding; coastal processes of erosion and mass transport; mass movements, the downhill march of material; and the effects of ice and wind in sculpturing the land.

Detailed explanation-4: -Surface water floods occur when an urban drainage system is overwhelmed and water flows out into streets and nearby structures. It occurs gradually, which provides people time to move to safe locations, and the level of water is usually shallow (rarely more than 1 meter deep).