When was the last major flood in Bangladesh?

Answer 1

well for a number of reasons, here they are:

Natural Factors

1. Bangladesh if very low lying, 70% of it is less than 1M above sea level.
2. Bangladesh receives large amounts of water passing through it with two major rivers (the Ganges and Brahmaputra) converging and forming a huge delta formed from silt deposited by the river as it enters the sea. Both rivers have large volumes of water flowing through them to the sea as they have large drainage basins which increasing the flood risk;
3. Bangladesh has a monsoon climate and the annual torrential rains which result often result in the rivers exceeding their capacity and flooding;
4. In the spring, melting snow from the Himalayas further increases the flood risks as torrents of melt water enter the rivers at their source.

Human Factors

1. Increasing population pressure in the foothills of the Himalayas where the rain contributes to the source of the River Ganges and Brahmaputra has resulted in intense deforestation. It is believed that this reduction in interception has resulted in more water entering the rivers - indeed with 92% of the area drained by the rivers being in countries other than Bangladesh, Bangladesh's proneness to flooding is exacerbated by population and environmental issues in countries other than its own, making it increasingly difficult to target the problems.
2. Indeed deforestation in the headwaters is also believed to be responsible for the increased soil erosion which has led to large amount of silt being washed into the rivers and subsequently being deposited on the river bed, reducing its channel capacity and increasing the likelihood of flooding.
3. Increasing population pressure in Bangladesh itself has resulted in the sinking of many new wells resulting in the lowering of the water table and the subsequent subsidence of land making it even more prone to flooding;
4. Bangladesh is an LEDC and its lack of money and heavy national debt means that little money is available to spend on flood protection methods / defenses and many existing defenses lack upkeep and are of questionable use.

Answer 2

- Monsoon rain causes more water to fill the delta and spread alive fish

- Deforestation in china and India means less interception which gives a shorter lag time, trees also can't absorb some of the rain water. The large amount of tarmac roads also increase the amount of "run off"

- The Himalayan mountains also gives a shorter lag time for the water to drain into the river.

- The confluence of Bangladesh's 2 main rivers is located near the capital -Dhaka- and cities are made of concrete which will not allow percolation.

- The flat land of Bangladesh also adds to the amount of devastation in Bangladesh.

Answer 3

There have been several floods in Bangladesh. It is a low-lying country with a big river flowing through it.

Answer 4

In1998, the last flood occurse in bangladesh about 10 weaks. Then 2010, also occurse. But 1998 is bigest than 2010

Answer 5

it exactly happened on the 26th July 2004

Answer 6

in 1998

Answer 7

10 weeks