GEOLOGY

Detailed explanation-1: -Flash Floods. Flash floods are defined as those flood events where the rise in water is either during or within a few hours of the rainfall that produces the rise. Therefore, flash floods occur within small catchments, where the response time of the drainage basin is short.

Detailed explanation-2: -Flash floods are when a lot of stormwater fills normally dry areas in a short amount of time with little or no warning. This is the fastest moving type of flood and can surprise people. Flash flooding happens from very heavy rainfall during short intense storms.

Detailed explanation-3: -Most flash flooding is caused by slow-moving thunderstorms, thunderstorms repeatedly moving over the same area, or heavy rains from hurricanes and tropical storms. Occasionally, floating debris or ice can accumulate at a natural or man-made obstruction and restrict the flow of water.

Detailed explanation-4: -Flash flood is rapid flooding of an area which is caused by largely tidal bores.

Detailed explanation-5: -These floods are distinguished by their quick rise and intense, destructive flow. It is not unusual for a flash flood to have a channel velocity of about 9 ft (2.7 m) per second. At that speed, flash floodwaters can move a 90 pound (41 kg) rock downstream.