Flooding in an LEDC - Bangladesh Flashcards
What is our case study for a flood in an LEDC?
Bangladesh.
When was the Bangladesh flooding?
July 2004.
Name the main rivers which flow through Bangladesh?
The Ganges.
Brahmaputra.
Heavy monsoon rained from when?
May to September.
What % of Bangladesh is a delta or floodplain?
80%
What is the land like in Bangladesh?
Flat.
Low lying.
Easily flooded.
What % is only _ metres above sea level?
75%
10m.
What is most of its delta built up from?
Silt of three rivers.
Whats wrong with all three rivers?
They have their peak flow at the same time.
Rivers are blocked or their channels are shallow because of what?
Deposited silt.
What increased surface run-off and adds to deposition and flooding downstream?
Deforestation in Nepal and the Himalayas.
What has urbanisation of flood plains done?
Increased magnitude and frequency of floods.
What has the building of dams done in India?
Increased the problem of sedimentation in Bangladesh.
What is Global warming blamed for?
Sea level rise.
Increased snow melt.
Increase rainfall in region.
What do poorly maintained embankments do?
Leak and collapse in times of high discharge.
