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A flood (in Old English flod, a word common to Teutonic languages; compare German Flut, Dutch vloed from the same root as is seen in flow, float) is an overflow of water, an expanse of water submerging land, a deluge. In the sense of "flowing water", the word is applied to the inflow of the tide, as opposed to the outflow or "ebb". The Flood, the great Universal Deluge of myth and perhaps of history is treated at Deluge in mythology.

2006-10-19 22:49:37 補充：
Since prehistoric times man has lived by the seas and rivers for the access to cheap and quick transportation and access to food sources and trade;

2006-10-19 22:49:48 補充：
without human populations near natural bodies of water, there would be no concern about floods. However fertile soil in a river delta is subject to regular inundation from normal variation in precipitation.

2006-10-19 22:50:39 補充：
Floods from the sea can cause overflow or overtopping of flood-defences like dikes as well as flattening of dunes or buffs.

2006-10-19 22:50:53 補充：
Land behind the coastal defence may be inundated or experience damage. Floods from sea may be caused by heavy storm (storm surge), high tide, a tsunami, or a combination thereof. As most urban communities are located near the coast, this is a major threat around the world.

2006-10-19 22:54:32 補充：
copy唔到咁多，你自己上wikipedia睇啦！去wikipedia裡面查Flood Damages，雖然佢唔係point form，不過佢都係得一兩段係講後果架…所以你自己睇唔會好難…

the loss for the flood