Bangladesh (South Asia) flooding case study 2007
This was a great flood which occurred from June the 30th to August the 15th it was a major flood killing and making millions of people homeless. It affected not only Bangladesh but also most of South Asia, affecting over 10.5 million people overall.
· Cyclones occur frequently, this causes coastal flooding as the water is displaced.
· There is lots of low-laying land in South Asia meaning that it creates a large flat flood plain as it is on a delta mostly
· Water constantly melts from the Himalayas which adds to the discharge of the river
· There is lots of deforestation which occurs on the Himalaya mountains where there are forests
· Many heavy rainfall events occur from the yearly monsoon adding to the discharge of the river
· Urban areas are increasing because of the impermeable land this will mean no infiltration
· Tectonic uplift in the Himalayas meant that sediment erosion increases. As the land increases height or decreases so it must reach base level. This increase will clog up the channel with eroded sediment meaning less water can fit causing a flood
· The converge between the Ganges, Brahmaputra and the Megha creates discharge swell.
· The Himalayas create relief which means that less rain will infiltrate the soil, instead it will bounce off and become runoff/over ground flow this causes water to enter the river…