Rivers, Floods and Management - Bangladesh Case Study Flashcards Preview

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Flashcards in Rivers, Floods and Management - Bangladesh Case Study Deck (55)
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1

Location

South-Central Asia

2

Frequency of major floods

Every 8 years

3

3 major rivers

Meghna
Brahmaputra
Ganges

4

Capital of Bangladesh

Dhaka

5

Population of Bangladesh's capital

Dhaka 1 million

6

How much rainfall fell in Bangladesh and when? This was the worst rain for how many years?

350mm in 24 hours
13th September 2004.
Worst rain for 50 years.

7

How much of Bangladesh is how far above sea level? Why?

20% less than 1 metre above sea level.
Because it is built on a floodplain on delta land.

8

Summary: 5 physical causes of Bangladesh flood

- Heavy rainfall
- Monsoon climate
- Low lying
- Himalayas
- 3 major rivers

9

What system was put in place for farming? Which river? Effects?

Irrigation system to divert the Ganges.
Reduced speed of flow in channels = more deposition inland, less on low lying delta = didn't build up

10

Name 2 places where urban growth occurred

Nepal and Tibet

11

Summary: 4 human causes of flood

- Irrigation diverted Ganges
- Urbanisation
- Deforestation of Himalayas
- Global warming

12

Deaths

800

13

How much of the country was flooded?

38%

14

How much of Dhaka was under water and in which month?

40% under water in July

15

How many bridges destroyed?

900

16

How much road damaged?

15,000 km

17

How much farmland destroyed?

800,000 ha

18

How many people suffered from diarrhoea in Dhaka?

100,000

19

Cost of total damage?

$7 billion

20

2 other long term impacts

Rice crops devastated = food shortages

Jute and sugar cash crops rotted = money shortages

21

How much aid did the UK give?

£21 million

22

How much aid did the UN appeal for? How much did they actually get?

Appealed for $74 million.

Only got 20% by September

23

What charity gave Bangladesh short term aid?

Water aid - water purification tablets

24

2 other short term responses

- NGOs: rice, clothing, medicine, blankets
- Farmers given free seed

25

9 long term responses

- Flood action plan formed
- Early warning system
- sluice gates
- 2 ha of raised land for flood shelter
- Coastal homes on stilts
- homes raised by 2m on earth banks
- Embankments strengthened
- Self help schemes: rebuilt homes & communities
- Additional financial aid granted

26

By how much were homes raised on earth banks?

2m

27

How much raised land was created for flood shelter?

2 ha

28

Date

2004

July---> September

29

What economic factor limits Bangladesh's ability to manage floods?

GDP per capita = $700 and tax revenue limited = rely on foreign aid and NGOs

30

Why did heavy rainfall lead to flooding?

Groundwater stores filled = water table reached surface = surface runoff