Flood control denotes all the methods used to decrease or check the harmful effects of the flood waters. Floods are caused by a lot of factors: severe winds, heavy rainfall, tsunamis, strange high tides, or breakdown of dams, retention ponds, levels, or other constructions that is full of water. Flooding could be exacerbated by amplified amounts of impermeable surface or by additional natural hazards like wildfires that decrease the supply of plants that could take up rainfall.
Periodic floods take place on a lot of rivers, forming a nearby region recognized as the flood plain. During times of snow or rain, some water is retained in soil or ponds, some is soaked up by vegetation and grass, some evaporates, as well as the rest treks above the land as the surface runoff. Floods take place when riverbeds, ponds, lakes, vegetation and soil can’t absorb all water. Water after that run off the land in the quantities that can’t be carried in stream channels or maintained in the lakes, natural ponds and artificial reservoirs. Around 30% of all the precipitation is in type of surfeit small plus that amount may be augmented by water from the melting snow. Stream flooding is normally reasoned by heavy rain, at times augmented by melting snow. Flood that rises quickly, with small or no prior warning, is known as a flash flood. Flash floods generally outcome from severe rainfall over a comparatively small region, or if the region was already flooded from earlier precipitation.
Harsh winds over water
Even when the rainfall is comparatively light, shorelines of bays and lakes could be flooded by brutal winds like for the period of hurricanes that blow water in the shore areas.
Unusual high tides
Coastal areas are at times flooded by strangely high tides like spring tides, particularly when compounded by storm surges and high winds.
Flooding has a lot of impacts. It damages the property and put in danger the lives of the humans as well as other species. Speedy water runoff reasons soil erosion as well as connected sediment deposition somewhere else (like further downstream or downward a shore). Spawning grounds for fish as well as other wildlife habitats could become impure or totally destroyed. A few extended high floods could delay the traffic in the areas that lack the elevated roadways. Floods could hinder with drainage as well as economic use of the lands, like interfering with agricultural. Structural harm could take place in bridge abutments, sewer lines, bank lines and other constructions inside the floodways. Waterway steering and hydroelectric power are normally damaged. Monetary losses because of floods are usually lots of dollars every year.
Control of the floods
Some techniques of flood control are practiced since the ancient times. These techniques comprise planting plants to retain additional water, terracing hill sides to slow the flow downhill, and construction of floodways (artificial channels to redirect floodwater). Other techniques comprise the building of levees, dams, dikes, reservoirs or preservation ponds for holding extra water in the times of flooding.
Author Resource:
Bill Pappas is the author of this article on Lift Stations .
Find more information about Overhead Sewers here.
![[Valid RSS feed]](http://www.look4articles.com/images/icon_Rss.png "XML Feed For RSS"){kind=icon}
Category Rss Feed
Print This Article
Add To Favorites
![[Valid RSS feed]](http://www.look4articles.com/images/rss.jpg "XML Feed For RSS")