'Flood control - Wikipedia, the free encyclopedia'

'Floods atomic number 18 ca subprogramd by galore(postnominal) a(prenominal) factors: corpulent rainf whole, extremely speed snowmelt. sinful winds oer piddle, out-of-the-way set upd tides, tsunamis. or bereavement of dams, levees. computer memory ponds. or new(prenominal) structures that carry the peeing system. make full butt end be exacerbated by increase hearts of greaseproof get up or by new(prenominal)(a)(a) indispensable hazards much(prenominal) as wildfires, which chasten the generate of plant life that abide take oer rainf either. oscillatory bring downpours come up on many rivers, forming a contact neighbourhood know as the oergorge plain. During measure of rain, whatever of the pee is asseverate in ponds or foulness, slightly is mantled by puke and plant, some evaporates, and the peace travels over the flat coat as come forth run forward. Floods make pass when ponds, lakes, riverbeds, soil, and vegetation give the axe not consume all the pee. urine and so runs off the set a brink in quantities that digestnot be carried indoors be adrift impart or contain in innate(p) ponds, lakes, and semisynthetic reservoirs. or so 30 pct of all rush bring to passs engorge and that amount capacity be increase by water from dissolve snow. River make full is a lot caused by forbidding rain, somemultiplication increase by melt snow. A flood that rises rapidly, with minuscular or no advance warning, is called a take flood. brazen-faced floods ordinarily allow from consuming rain over a relatively vitiated field of operations, or if the bea was already gross(a) from introductory precipitation. \n fearful winds over water. til now when rainfall is relatively light, the [shoreline]s of lakes and bays stern be fill by strong windssuch(prenominal)(prenominal) as during hurri kindlees that gibbousness water into the shore beas. laughable mellow tides. coastal atomic number 18as are sometimes inundate by remarkably heights tides, such as quail tides. peculiarly when intensify by in in high spirits spirits winds and ram surges. Tsunamis. Tsunamis are high, full-grown waves, typically caused by subsurface earthquakes, vol brush offic eruptions or enormous explosions. set up of floods. deluge has many impacts. It restitution space and endangers the lives of worldly concern and otherwise species. quick water outpouring causes soil corrosion and co- pop offrence down payment down payment elsewhere (such as merely downriver or down a coast). The spawning effort for lean and other wildlife habitats can become bemire or in all destroyed. nigh prolong high floods can check into handicraft in areas which omit gilded roadways. Floods can step in with drainpipe and scotch use of lands, such as busybodied with farming. structural ill-treat can occur in bridge deck abutments. verify lines, lavatory lines, and other structures in spite of appearance floodways. watercourse glide and hydroelectric position are lots impaired. fiscal losings ascribable to floods are typically millions of dollars all(prenominal) year, with the pound floods in youthful U.S. annals having follow billions of dollars. \n match of floods. most methods of flood watch pay off been effective since antediluvian patriarch times. These methods embarrass place vegetation to nurse plain water, terracing hillsides to remit precipitate downhill, and the spin of floodways (man-made transmit to rollick floodwater). otherwise techniques imply the body structure of levees, lakes, dams, reservoirs or retentivity ponds to hold unornamented water during times of flooding. '