... down trees causes increased run-off (water flowing over the surface of the earth).This is called Deforestation. Rain water reaches rivers faster which means flooding becomes more likely. Urbanisation is when human make surfaces like concrete it's very easy for the water to spread. Also, when people cut down trees, all the stumps are either dumped into the river which causes the river to become shallow which then causes the water level of the river to rise. Physical Causes Bangladesh is a very low lying country, with 70% of its land area being less than 1m above sea level, which makes it very easy for the water to spread. Bangladesh has large amounts of water passing through it with two major rivers (the Ganges and Brahmaputra) carrying huge amounts of dirt which is then deposited as they enter the sea. Bangladesh has a monsoon climate which often results in the rivers exceeding their ...

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