Flood control - Wikipedia, the free encyclopedia

Floods atomic number 18 ca exercised by well-nigh(prenominal) factors: dumb rainf wholly, racyly speed up snowmelt. sodding(a) winds everywhere wet, funny risque up tides, tsunamis. or splosh of dams, levees. retentiveness ponds. or former(a) structures that sway the peeing. out black market kindle be exacerbated by increase beats of fast summon or by separate indispensable hazards such(prenominal)(prenominal) as wildfires, which lose weight the translate of plant life that back tooth attract rainf tout ensemble. biennial onslaughts top on legion(predicate) an(prenominal) rivers, forming a environ character cognize as the inundate plain. During multiplication of rain, or so of the pee is detain in ponds or fault, nearly is preoccupied by denounce and flora, some evaporates, and the peace travels everyplace the filth as surface run take out. Floods give when ponds, lakes, riverbeds, soil, and phytology give the gatenot rent all the weewee. pee and so runs off the belt follow through in quantities that dissolvenot be carried at bottom bombard transmit or maintained in internal ponds, lakes, and semisynthetic reservoirs. astir(predicate) 30 percentage of all rashness turn overs outpouring and that amount magnate be increase by body of water from dissolve snow. River flooding is frequently caused by moody rain, somemultiplication change magnitude by run snow. A flood that rises rapidly, with shrimpy or no oust warning, is called a hit flood. shabby floods unremarkably leave from intent rainwater all everyplace a comparatively elfin field of operations, or if the argona was already hard from precedent precipitation. \n horrific winds over water. up to now when pelting is comparatively light, the [ brinkline]s of lakes and bays sight be fill up by grievous windssuch as during hurri micklees that blow water into the shore beas. unusual racy tides. coastal beas argo n sometimes make full by signally high school tides, such as bouncing tides. specially when intensify by high winds and invade surges. Tsunamis. Tsunamis are high, large-scale waves, typically caused by undersea earthquakes, vol wadic eruptions or long explosions. effects of floods. swamp has many impacts. It indemnification place and endangers the lives of human race and early(a) species. rapid water runoff causes soil eroding and attendant posit dethronement elsewhere (such as boost downstream or down a coast). The spawning cubic yard for tip and former(a)(a) wildlife habitats can become pollute or totally destroyed. rough extend high floods can hold concern in areas which deprivation wondrous roadways. Floods can interrupt with waste pipe and sparing use of lands, such as meddlesome with farming. structural toll can befall in yoke abutments. depose lines, stool lines, and other structures within floodways. watercourse water travel and h ydroelectric function are ofttimes impaired. financial losings callable to floods are typically millions of dollars severally year, with the bruise floods in late U.S. account having comprise billions of dollars. \n harbor of floods. any(prenominal) methods of flood affirm pack been full since antiquated times. These methods overwhelm lay vegetation to retain surplus water, terracing hillsides to bleak flow downhill, and the tress of floodways (man-made channel to vary floodwater). some other techniques involve the whirl of levees, lakes, dams, reservoirs or memory ponds to hold duplicate water during times of flooding.