A flood is an overflow of water that submerges land. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries.
While the size of a lake or other body of water will vary with seasonal changes in precipitation and snow melt . Floods can also occur in rivers, when flow exceeds the capacity of the river channel, particularly at bends or meanders. Floods often cause damage to homes and businesses if they are placed in natural flood plains of rivers.
The word "flood" ...view middle of the document...
Floods caused by a significant and unexpected event e.g. dam breakage, or as a result of another hazard (e.g. earthquake or volcanic eruption).
A muddy flood is produced by an accumulation of runoff generated on cropland. Sediments are then detached by runoff and carried as suspended matter or bed load. Muddy runoff is more likely detected when it reaches inhabited areas. Muddy floods are therefore a hill slope process, and confusion with mudflows produced by mass movements should be avoided.
Floods can occur if water accumulates across an impermeable surface (e.g. from rainfall) and cannot rapidly dissipate (i.e. gentle orientation or low evaporation).A series of storms moving over the same area. Dam-building beavers can flood low-lying urban and rural areas, often causing significant damage.
Effects due to floods
(1) Primary effects
(a) Physical damage –it includes damage to structures, including bridges, buildings, sewerage systems, roadways, and canals.
(2) Secondary effects
(a) Water supplies –due to Contamination of water, clean drinking water will become scarce.
(b) Diseases –due to Unhygienic conditions many water-borne diseases Spread around.
(c) Crops and food supplies – due to loss of entire harvest, Shortage of food crops take places. However, lowlands near rivers depend upon river silt deposited by floods in order to add nutrients to the local soil.
(d) Transport – Transport links destroyed, so hard to...