Literature Review Of Floods In Bangladesh

Literature review :
Flood has been very serious issue for any economy, it becomes very difficult for the developing economies to get back the stability after the serious devastation of the flooding. Previous study of Dr. Asad Sarwar Qureshi (2011) states that many researches have been done so for on flooding, many researchers have said that floods are because of climate change but it is projected that melting of glaciers in Himalaya will increase the possibility of flooding, this is caused due to the global warming, it leads to melt down the glaciers and ice result to increase in the water level on specially downstream plains and generates devastative floods. flood is always an issue, climate changes are always expected to increase the

she describes that in Bangladesh floods occur due to three reasons first due to excessive rainfall, second due to river over flow and finally high tides from the sea during cyclones, flash floods mostly occur in Bangladesh in the pre-monsoon months of April-May in eastern and north-eastern hill stream hill stream . furthermore she describes that the floods arise from the overflow of rivers are key sources of irrigation in Bangladesh, because they make field more fertile and can provide support to high yielding varieties. Normal flood stays for three week or less, dept of the water in most plain areas is about 1-2 meter while 3 meter in low lying areas, it affected about 20 percent of the

He further describes that whenever planted land is flooded with excessive spring rains, then some degree of harm is probably inevitable, the depth of damage depends on the nature of the crops, nature of flood, duration of flood, and the temperature at the time of flood. Furthermore he concludes that damage occurs because flooding depletes the quantity of oxygen and Nitrogen, plants may require oxygen and nitrogen for proper growth, development and metabolism. Flood mainly result in highly diseases which reduces production , growth and development, and usually causes soil nitrogen losses which can severely restricts yield if nitrogen is not