Case Studies Flashcards

1
Q

Flooding: Mississippi and Missouri

A

1993

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2
Q

Flooding: Mississippi and Missouri

Causes 5

A
Heavily saturated ground
400-750% increase in precipitation over the plains between April and August 
Building on flood plains
Levees collapsing--> downstream 
Navigation--> dams built on tributaries
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3
Q

Flooding: Mississippi and Missouri

Impacts 7

A
$15-20 billion in damage
30,000m flooded 
32 deaths 
15 million acres of farm land destroyed 
"Ghost Towns"--> depopulation
Emotional trauma 
Levee breakages
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4
Q

Flooding: Mississippi and Missouri

Management 4

A

People relocated
Dams, dykes, and levees built
River straightening–> moves faster
Dredging

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5
Q

Flooding: Boscastle

A

Boscastle Cornwall, 16th August 2004

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6
Q

Flooding: Boscastle

Causes 9

A

Impermeable bed rock upland on Bodmin moor
Thin soil and lack of vegetation –> 70% of vegetation removed in the last 200 years
Steep converging topography
3 fluvial systems joining
High tide
Debris forming dams under bridges
Saturated ground–> wet summer
89mm of rain in one hour–> river rise of 2 m
14 cars trapped debris –> a 3m river rise

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7
Q

Flooding: Boscastle

Impacts 5

A
75 cars, 5 caravans, 6 buildings and boats washed into the sea
100 + houses and businesses destroyed
150 people rescued from roofs and trees
4 foot bridges washed away 
£20 million in damages
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8
Q

Flooding: Boscastle

Management 4

A

River bed lowered by 0.75m
River widened
4.6 million defense scheme in 2008
Routine river clearing

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9
Q

Flooding: Harbertonford 3

A

River Harbourne
Flooded 21 in the past 60 years
Over £50,000 damage

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10
Q

Flooding: Harbertonford
Management: Palmer Earth Dam 7

A
2km upstream form the village
60 year lifespan
Can hold a 1/400 year flood
£850,000
4.1ha reservoir storage
Afforestation
600mm drop in river bed level
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11
Q

Flooding: Harbertonford
Management: Storm drain 4

A

25 year lifespan
£4000
Overflow culvert
Speeds water up

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12
Q

Biomes: grassland

A

Serengeti, Tanzania

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13
Q

Biomes: grassland

Formation 5

A
Too much rain to be a desert
Too little rain to be a rain forest
ITCZ, 21st June tropic of Cancer
ITCZ, 21st December tropic of Capricorn
Effects convection cells, and therefore precipitation
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14
Q

Biomes: grassland

Characteristics

A

50-127cm of rain
2 seasons–> long dry winter, wet summer
Lions, zebras, elephants, giraffes, ungulates
Grass, acacia trees

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15
Q

Biomes: desert (warm)

A

Sahara

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16
Q

Biomes: desert (warm)

Formation 3

A

High pressure due to convection cells
Increased solar radiation
Little rain and clouds

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17
Q

Biomes: desert (warm)

Characteristics 2

A

Less than 35 cm of rain

Few plants and animals–> cacti and snakes

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18
Q

Biomes: desert (warm)

Threat of Climate Change 5

A

Desertification
Extinction of species–> Addax, Barbary sheep
Over the past 25 years 9/12 deserts studied have warmed faster than surrounding areas
Culture loss–> Tuareg Nomads
Temperature increase, water decrease

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19
Q

Causes of Climate Change (Natural) Volcanoes:

A

Volcanic aerosol reflects solar radiation, reducing the heat the earth receives.

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20
Q

Causes of Climate Change (Natural) Volcanoes:

Mount Tambora 7

A

1815
Indonesia
VEI-7
Led to the “Year without Summer”
Eruption column reached the stratosphere at 43km
0.5°C decrease in temperature
Sulfate concentration in ice cores increases

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21
Q

Causes of Climate Change (Natural) Oceans:

Long term 5

A

Laurentide ice sheet
Ice sheet melted in North America adding cold freshwater to the Atlantic
Stopped the convection currents that produce the Gulf Stream
Led to the European ice age–> Younger Dryas
500 years for the Gulf Stress to restart

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22
Q

Causes of Climate Change (Natural) Oceans:

Short term: El Nino 5

A

Dramatic reduction in trade winds
Convection cell breaks down
Warm water in the western tropical Pacific Ocean shifts eastward along the equator toward the coast of South America
South America receives more precipitation
Rest of the world deviates from the norm

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23
Q

Causes of Climate Change (Natural) Oceans:

Short term: La Nina 3

A

Trade winds are more intense
More rainfall in the west Pacific
Drought along the South American coast

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24
Q

Causes of Climate Change (Natural) Oceans:

Short term: El Nino Effects 9

A
1997-98= strongest El Nino in 100 years 
Heatwaves in India and TExas
Floods in Bangladesh and China
South Asia= late monsoon season
Indonesia= forest fires
Harvest failure= Africa
Malaria increased
Bleaching of coral reefs
£50 billion total damage
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25
Causes of Climate Change (Natural) Orbital Variations: | Wobble 3
21,000 cycle Earth wobbles on its axis in space Makes the sun closer or further away
26
Causes of Climate Change (Natural) Orbital Variations: | Tilt 3
41,000 cycle Tilt of the earth on its axis in space When tilt increases, summers are warmer, winters are colder
27
Causes of Climate Change (Natural) Orbital Variations: | Stretch 3
95,000 cycle Orbit isn't a perfect cycle Milankovitvh's theory fits 14/16 of the warm periods in the past million years
28
Causes of Climate Change (Human) Burning Coal 6
``` UK: Coal produces a 1/3 of electricity now, 1990 2/3 Drax Yorkshire 6 Generators 625 employees 7% electricity needs Produces CO2 228.6 pounds per BTU ```
29
Causes of Climate Change (Human) CO2 5
Responsible for 60% of global warming through the greenhouse effect 75% from fossil fuel burning China=largest consumer of coal Due to industrialization, car ownership, technology and development. 2007 China building a new coal plant every other week
30
Causes of Climate Change (Human) Methane 4
25% more effective at trapping heat than CO2 Intensification of farming--> paddy rice fields Produced as bacteria break down organic material in anaerobic conditions Landfill sites too
31
Effects of Climate Change: Sea level rise | Carteret Islands 3
First climate change refugees in 2009 Moved to Bougainville, island off Papua New Guinea Community broken up
32
Effects of Climate Change: Sea level rise | Tuvalu 9
Highest point= 4.6m 20-40cm rise in the next 10 years, Tuvalu will be uninhabitable Temperature increasing Heat days increasing Ocean acidification increasing--> coral bleached Cyclones and tropical storms increasing Evacuation to New Zealand Storm surges with increased frequency and height Flooding, salination of coils, crops destroyed, sewers leaking
33
Effects of Climate Change: Sea level rise | Bangladesh 3
80% of land under 1m above sea level 1m sea level rise effect 15 million people 17,000km of land would be submerged
34
Effects of Climate Change: Deglaciation | Mount Kilimanjaro 4
5895m above sea level 2000-2011 40% of ice melted Glaciers thinnning After 2060 no ice will remain
35
Effects of Climate Change: Deglaciation | Himalayas 3
15000 glaciers | Glacial retreat could effect 500 million people due to people relying upon meltwater
36
Effects of Climate Change: Deglaciation | Antarctica: The Peninsula 3
1995 Larsen A ice shelf collapsed 1970 Worldie ice sheet disintegrated 2002 Larsen B disintegrated
37
Effects of Climate Change: Deglaciation | Antarctica: West Antarctica 2
Warmed by 0.1°C every decade in the last 50 years | Reduction of glaciers especially due to marine influences
38
Effects of Climate Change: Deglaciation | Antarctica: East Antarctica 4
More precipitation--> tropical convection cell increased in size--> closer to east Antarctic--> effecting the polar cell
39
Effects of Climate Change: Extreme Weather | Heat Wave 4
August 2003 heatwave Hottest for up to 500 years By 2050 could be this hot every other year 38.5°C measured in Kent
40
Effects of Climate Change: Extreme Weather | Heat Wave Physical Impacts 5
River Danube fell to its lowest level in 100 years exposing ww2 bombs Reservoirs ran low Forest fires--> Portugal 215,000ha destroyed Millions of tonnes of top soil eroded--> river water quality decreased Deglaciation and snow melt in the Alps--> increased rock fall
41
Effects of Climate Change: Extreme Weather | Heat Wave Social impacts 7
Over 20,000 dead--> temporary mortuaries in refrigeration lorries in France Heat stroke, dehydration, air pollution and sunburn Water supply effected--> hose pipe ban Cost €13.1 billion to agriculture Railway lines buckled in the heat, tubes cancelled, road surfaces melting 2 nuclear power plants had to close down--. water for cooling unavailable Aid from EU
42
Strategies to Address Climate Change: International 7
Kyoto Protocol 1997 Internationally reduce Greenhouse and gas emissions Currently 192 parties Canada withdrew in 2012 USA and Australia not ratified--> 2008 joined Climate justice UK target of -8, meet -12.5
43
Strategies to Address Climate Change: Government | Top Down 7
Nuclear power- invested by Tony Blair in 2006 Hinkley C Somerset, Oldbury Gloucestershire Gov working with energy companies to invest in wind power UK has 6691 wind turbines 6th largest producer of wind power Wind power 2008 1.5% 2015 11% David Cameron :(
44
Strategies to Address Climate Change: Government | Bottom Up 4
Solar power Gov guarantees minimum price for power Subsides on solar panels Feed in Tariff earn up to £8,080 over 20years
45
Strategies to Address Climate Change: Pressure groups 6
Kingsnorth power station 2007 climbed chimney and attempted to write "Gordon bin it" Caused £30,000 damages 6 protesters Trying to prevent Climate Change--> were acquitted Individuals--> solar, Renault Twizy, recycling
46
Earthquake: Izmit Turkey 2
August 17th 1999 | 7.4 Richter scale
47
Earthquake: Izmit Turkey | Causes 4
Conservative margin slipped between the Eurasian and African plate Occurred on the western portion of the North Anatolian fault zone Anatolian plate being pushed west about 2.5cm a year between the Eurasian and Arabian plates Rupture length of 150km
48
Earthquake: Izmit Turkey | Secondary Hazard 2
Tsunami in the Sea of Marmara | 2.5 m high
49
Earthquake: Izmit Turkey | Demographic effects 4
4500 dead 43959 injured More males dead due to factory area being nearing to the epicentre Temporary mass exodus--> potential aftershocks
50
Earthquake: Izmit Turkey | Social effects 9
Poor building quality--> 600 apartments by the same contractor collapsed 65% of buildings illegal/no regulation 120,000 houses damaged beyond repair Damage to pipes and power lines=fire Trapped in houses 500,000 homeless Lack of clean water + untreated sewage= cholera and diarrhoea Psychological trauma 5 tunnels, 20 viaducts, multiple bridges damaged
51
Earthquake: Izmit Turkey | Economic effects 5
Tidal waved flooded farmland damaging crops $23 billion in damage Heavily industrialised and densely populated area damaged Oil refinery, navy base Trans European motorway damaged
52
Earthquake: Izmit Turkey | Responses 9
Temporary shelter for weeks with little water and poor sanitation International response within 24 hours 12 countries assisted rescue efforts UK pledged £50,000 Engineers from Thames water Red Cross pledge £4.5 million 12 days to restore electricity Bodies buried quickly avoiding disease spread Turkish soldiers given 45 days leave to visit family
53
Earthquake: Izmit Turkey | Management 5
Building quality increased Earthquake proof technology and engineering Evacuation tests Isolation valves in gas pipes Istanbul's airport became largest earthquake proof building in the world
54
Earthquake: Izmit Turkey | Perception 6
Aid services- 72 hours non stop, under prepared, limited resources Scientists- accurately forecast, but still under prepared, pattern of earthquakes moving along the fault line
55
Volcano: Nevado Del Ruiz, Colombia 1
November 13th 1985
56
Volcano: Nevado Del Ruiz, Colombia | Causes 11
Part of the Ruiz-Tolima massif Intersection of 4 faults Pacific ring of Fire Andean volcanic belt Stratovolcano 25km ice cap on the top Subduction of Nazca beneath South American plate Not erupted for 100 years, pressure build up Lahars= ice cap melting + pyroclastic flow Lahars travel down river valleys--> town located Lahars at 200mph and up to 400°C
57
Volcano: Nevado Del Ruiz, Colombia | Demographic effects 3
Lahars killed 70% of Armero, 22,000 people 15000 animals killed 45,00 people injured
58
Volcano: Nevado Del Ruiz, Colombia | Social effects 4
8000 people homelss Roads blocked by mud--> effected food and communication Clean water ran out 50 schools, 2 hospitals damaged
59
Volcano: Nevado Del Ruiz, Colombia | Economic effects 4
$7.7 billion 20% of GDP 58 industrial plants destroyed 343 commercials establishments destroyed 3,400 ha of agricultural land destroyed
60
Volcano: Nevado Del Ruiz, Colombia | Responses 8
Red Cross, civil defense, military distributed supplies and care 30 countries + offered aid Public protests in 1986 Red Cross leaflets Hazard maps Sirens Route markers painted on buildings to show exits Deemed safe on the 12th of November- preventable?