Geography, asked by bhairwikushwahowl8dw, 11 months ago

which river causes flood in Assam and Bangladesh and why also name its tributes

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Answered by Rajeshkumare
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prone to flooding due to being situated on the Ganges Delta and the many distributaries flowing into the Bay of Bengal. Coastal flooding, combined with the bursting of river banks is common, and severely affects the landscape and society of Bangladesh. 80% of Bangladesh is floodplain,[1] and it has an extensive sea coastline,[2] rendering the nation very much at risk of periodic widespread damage. Whilst more permanent defences, strengthened with reinforced concrete, are being built, many embankments are composed purely of soil and turf and made by local farmers. Flooding normally occurs during the monsoon season from June to September. The convectional rainfall of the monsoon is added to by relief rainfall caused by the Himalayas. Meltwater from the Himalayas is also a significant input.



In late summer 2002, heavy monsoon rains led to massive flooding in eastern India, Nepal, and Bangladesh, killing over 500 people and leaving millions homeless. This true-color image, acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA's Terra spacecraft begins on August 5, 2002, shows the extent of this flooding. In the upper right-hand corner of the image, the swollen Brahmaputra River runs east to west through the Indian state of Assam. Normally, the river and its tributaries would resemble a tangle of thin lines. Moving to the upper left-hand corner, flooding can be seen along the Ganges River in the state of Bihar, India.

Each year in Bangladesh about 26,000 km2(around 18% of the country) is flooded, killing over 5,000 people and destroying more than seven million homes.[clarification needed] During severe floods the affected area may exceed 75% of the country, as was seen in 1998. This volume is 95% of the total annual inflow.[clarification needed] By comparison, only about 187,000 million m3 of streamflow is generated by rainfall inside the country during the same period. The floods have caused devastation in Bangladesh throughout history, especially in 1966, 1987, 1988 and 1998. The 2007 South Asian floods also affected a large portion of Bangladesh.

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