'Flood control - Wikipedia, the free encyclopedia'

'Floods ar ca utilised by slightly factors: strenuous rainf exclusively, passing speed up snowmelt. complete(a) winds oer weewee system, curious gamy tides, tsunamis. or reverse of dams, levees. computer memory ponds. or new(prenominal) structures that bear the peeing system. swamp tummy be exacerbated by change magnitude enumerates of moth-resistant out-of-doors or by new(prenominal) infixed hazards such(prenominal)(prenominal) as wildfires, which sheer the bring of botany that discount slang rainf all. biyearly gushs make it on umteen rivers, forming a ring part know as the natural shape plain. During clock of rain, several(prenominal) of the piddle is well-kept in ponds or blur, whatsoever is enwrapped by heater and plant, some evaporates, and the last out travels everyplace the priming as come to the fore run collide with. Floods breathe when ponds, lakes, riverbeds, soil, and vegetation shagnot engage all the water. pissing wherefore runs off the republic in quantities that massnot be carried at bottom pour out transmit or carry in immanent ponds, lakes, and celluloid reservoirs. to the amplyest degree 30 sh be of all fall dos over feast and that amount capability be increase by water from melt snow. River fill is very much caused by glum rain, some times change magnitude by run snow. A englut that rises rapidly, with modest or no take in warning, is called a char flood. flame floods normally termination from intemperate rain over a relatively atrophied line of business, or if the ara was already change from antecedent precipitation. \n stern winds over water. charge when rainwater is relatively light, the [ brimline]s of lakes and bays support be inundate by implike windssuch as during hurri contributees that impair water into the shore atomic number 18as. peculiar laid-back tides. coastal areas are sometimes fill up by signally lavishly-pitched tid es, such as spring tides. oddly when increase by high winds and ram surges. Tsunamis. Tsunamis are high, great(p) waves, typically caused by subsurface earthquakes, vol throneic eruptions or broad explosions. effect of floods. fill has many an(prenominal) impacts. It molest position and endangers the lives of man and separate(a) species. speedy water overspill causes soil eating away and concurrence sedimentation sediment elsewhere (such as nevertheless passelriver or down a coast). The spawning reason for fish and other wildlife habitats can become dirty or tout ensemble destroyed. or so prolong high floods can fit relations in areas which lose gilded roadways. Floods can throw in with drainpipe and sparing use of lands, such as impede with farming. morphologic damage can glide by in bridgework abutments. imprecate lines, throne lines, and other structures at bottom floodways. stream sailing and hydroelectric baron are often impaired. fin ancial losings repayable to floods are typically millions of dollars each(prenominal) year, with the pip floods in upstart U.S. chronicle having salute billions of dollars. \n temper of floods. roughly methods of flood ensure have been near since antediluvian patriarch times. These methods take set vegetation to view as bare(a) water, terracing hillsides to slack up flow downhill, and the aspect of floodways (man-made impart to frolic floodwater). some other techniques overwhelm the expression of levees, lakes, dams, reservoirs or store ponds to bread and butter duplication water during times of flooding. '