Flooding Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

How many people were made homeless by the 1998 floods in Bangladesh?

A

30 million

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2
Q

In 1998, ……………. of Bangladesh was underwater for ……. days.

A

Two thirds, 50

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3
Q

The rivers flowing through Bangladesh drain a basin ……. times the size of Bangladesh.

A

10

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4
Q

Why is aggradation an issue in Bangladesh?

A

Irrigation in China and Nepal causes silt to enter the rivers; this is then deposited in Bangladesh and reduces the capacity of rivers

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5
Q

How much has Bangladesh’s population increased in recent decades?

A

Between 1960 and 2010, population grew from 58 million to 158 million

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6
Q

How many people in Bangladesh live below the poverty line (and therefore cannot protect themselves from flooding)?

A

50 million

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7
Q

How much does flooding in Bangladesh cost on average?

A

3-10% of GDP

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8
Q

What are three sustainable development projects being run in Bangladesh?

A

Practical Action’s fishing, pumpkin farming, Christian Aid’s ducks

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9
Q

Why do water-borne diseases such as cholera thrive during floods in Bangladesh?

A

Many people live very close together in slums or have to move into temporary shelters during the floods, and have very little access to healthcare

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10
Q

How much of the world’s population lives in the coast?

A

10%

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11
Q

What were the peak wave periods in the Atlantic in 2014?

A

Over 20 seconds

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12
Q

How high were some waves in the Atlantic in 2014?

A

Over 10m

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13
Q

In 2014, what was the most costly damage in the UK floods?

A

The destruction of the London-Penzance railway at Dawlish in South Devon; the regional economy lost £1-20 million a day for the two months it was closed

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14
Q

Why are storm waves so destructive?

A

Longer wave periods show fast movement, energy proportional to height squared, slightly bigger wave has a lot more energy

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15
Q

What evidence was there of cliff shaking in the UK 2013/2014?

A

Porthcothan arch and Pom Pom Rock stack collapsed, seismometers in Porthleven cliffs

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16
Q

How long did some villages stay underwater in Somerset?

A

7 weeks

17
Q

How deep was the moorland flooding in Somerset?

A

3 feet

18
Q

How many homes were flooded in Somerset?

A

600

19
Q

Why did the water stay in Somerset for so long?

A

Flat reclaimed land, doesn’t drain

20
Q

What management was in place upstream of Bridgewater?

A

A moor was left as sacrificial land, however the flooding was worse than expected so it spilled over into neighbouring fields and homes

21
Q

The EA said it had protected 1.3 million homes. What evidence is there to suggest this?

A

In 2007, 48,000 homes were flooded in Tewkesbury; only 6,000 were flooded in 2014

22
Q

What is the Jubilee river?

A

A £110 million artificial channel protecting Maidenhead, Eton and Windsor

23
Q

How many homes does the Jubilee River protect?

A

3,000

24
Q

What is a disadvantage of the Jubilee River?

A

It rejoins the Thames at Wraysbury, increasing the likelihood of flooding

25
Q

What was the effect of the 2013/2014 winter storms on Hemsby, Norfolk?

A

30ft of the village, including some houses fell into the sea; 50 more at risk

26
Q

How much did the 2007 floods cost the Uk economy?

A

£3 billion

27
Q

In summer 2007, rainfall was …… times the normal amount.

A

300

28
Q

How many homes in Hull were severely damaged by the 2007 floods?

A

8,000

29
Q

How many businesses in Hull had to close?

A

1,300

30
Q

In 2004, how much water flooded Boscastle?

A

Equivalent of the Thames flowed through the village, funnelled by the valley

31
Q

Why were sluice gates opened at a dam near Rotherham?

A

Dam threatened to burst, flooding power lines and M1; 30 million of 120 million capacity released; residents of Catcliff downstream thought dam had already burst due to severity of flooding

32
Q

Why is Tewkesbury so vulnerable to flooding?

A

It lies on the confluence of the Severn and Avon

33
Q

What happened to the abbey in Tewkesbury?

A

First time flooding since 1770, became an island of 100-150 people

34
Q

How much rain fell over Gloucestershire in 2007?

A

135mm in 16 hours

35
Q

How much did the water level in the Severn rise by?

A

6m and the Avon was at its highest level ever recorded

36
Q

What were the secondary impacts of 2007 UK floods?

A

Thousands of houses without electricity and water supplies due to flooding at sub-station and contamination

37
Q

What were the immediate responses to the 2007 floods?

A

£87 million emergency aid for schools,transport and business; bottled water distributed

38
Q

What were the long term responses to the 2007 floods?

A

Plans to increase flood defence spending by £800 million by 2011, afforestation, better home design