Brahmaputra Flashcards
What is being generated to reduce flood risk in Bangladesh
Flood hazards maps, to show main threat areas
What is common with Bangladesh river systems?
Very small and intricate streams
Where does 90% of river flow originate from in Bangladesh?
India, Nepal, Bhutan and China
What does annual rainfall vary between in Bangladesh?
1250mm - 5700mm
What % of Bangladesh is Floodplains?
80%
What do floods damages in Bangladesh?
Agricultural production, Infrastructure damage, People displacement
What are the main causes of Bangladesh floods
Inflows from Up stream catchments, low flood plain gradients, cyclonic storm surges, coastal floods, poor drainage and confluence of rivers.
Why are many houses still built on the flood plain?
No knowledge of floodplain footprint, huge demand
What main rivers surround the southwest region of Bangladesh?
Haribhanga, Meghna, Ganges
In the south wester area how many large and small rivers are there?
10 large and 18 small
How many junctions and branches does the Southwest region have?
36, junctions and 58 branches
What is the Flood hazard calculated from?
Amount of damage done to an area, (e.g damage to services)
In the south west region on Bangladesh, what is the variation of population density?
1398, PPKM and 84 PPKM
How is the Magnitude of risk calculated for a hazard map?
Expected level of damage + loss of human lives
What determines how long it takes for a government to respond to a disaster?
The repetition or scale of the event
How many people died in the Brahmaputra flood in 1970?
225,000
What will climate change lead to? (Immerzeel 2008)
Intensification of the global hydrological cycle
What is the main source of the Brahmaputra and why is it expected to increase flow during climate change?
Himalayas, increased ice melt
Which glacier does the Brahmaputra come from?
Kailash
Why will an increase in water impact the Brahmaputra?
It will harm farming processes
What would increase in ice melt lead to?
Increase in summer flows
What is the avarice rate of warming per year in the Brahmaputra basin?
0.6 c
How much is the Tibetan Platau warming by?
1.1 c a year
What is the expected precipitation increase expected to be by 2100
22%
