Floods

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  • Floods
definition
  • Water covering previously dry area: a very large amount of water that has overflowed from a source such as a river or a broken pipe onto a previously dry area.
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broader
Abstract from DBPedia
    A flood is an overflow of water that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are an area of study of the discipline hydrology and are of significant concern in agriculture, civil engineering and public health. Flooding may occur as an overflow of water from water bodies, such as a river, lake, or ocean, in which the water overtops or breaks levees, resulting in some of that water escaping its usual boundaries, or it may occur due to an accumulation of rainwater on saturated ground in an areal flood. While the size of a lake or other body of water will vary with seasonal changes in precipitation and snow melt, these changes in size are unlikely to be considered significant unless they flood property or drown domestic animals. Floods can also occur in rivers when the flow rate exceeds the capacity of the river channel, particularly at bends or meanders in the waterway. Floods often cause damage to homes and businesses if they are in the natural flood plains of rivers. While riverine flood damage can be eliminated by moving away from rivers and other bodies of water, people have traditionally lived and worked by rivers because the land is usually flat and fertile and because rivers provide easy travel and access to commerce and industry. Some floods develop slowly, while others can develop in just a few minutes and without visible signs of rain. Additionally, floods can be local, impacting a neighborhood or community, or very large, affecting entire river basins.

    洪水(こうずい)とは、大雨などが原因で河川から増水・氾濫した水によって陸地が水没したり水浸しになる自然災害(天災)である。欧州連合のは、洪水を常態では水が無い陸地が水によって覆われることと定義している。工学的には、単に平常時よりも河川が増水する現象を指すため、河川が増水すれば災害の有無と関係なく呼称される。また、「水が湧き出る/流れる」の意味から、潮汐の流入を含む場合もある。洪水発生の原因は河川や湖などの水量であり、氾濫や堤防の決壊などを発端に境界を越えて引き起こされる。 洪水等の水によりもたらされる被害(洪水以外には降雨に誘発された土砂崩れなどがある)を総称して水害と呼び、これを制御することを治水と呼ぶ。

    (Source: http://dbpedia.org/resource/Flood)

data publication(s) found by GCMD Science Keywords)