Some AS Geog Case Studies

Just some Geog case studies for Geog1 aqa 

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  • Created on: 08-06-11 14:33
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Case studies
Rivers
Impacts of the Aswan Dam - Egypt, Nile
SHEEP Advantages Disadvantages
Social 1. Navigation on the river has 1. Water snails not being swept
been improved out of the river and increased
2. fish stocks in Lake Nasser number of irrigation channels has
provide a source of food. caused an increase in bilharzia.
2. 50000 were forced to leave their
homes because of lake Nasser.
3. Farmers now have to buy
fertilizers because there is no
annual flood deposits,
expensive may go out of
business.
Historic 1. Ancient temples were flooded
beneath Lake Nasser
Economic 1. Fishing in Lake Nasser 1. Huge financial cost in
provides employment for local construction and maintenance.
people.
2. Textile and steel industry
developed using HEP.
3. Dam is a tourist attraction.
4. Employment in production and
maintenance.
Environmental 1. 8% of Egypt is now irrigated. 1. Aswan dam traps sediment
Now 2 crops a year can be upstream so the Nile delta is
grown, Egypt can feed its starved of this sediment and is
growing population. now being eroded.
2. Due to irrigation high rates of
evaporation cause salt to build
up in the soil - salinization
3. No annual flood deposits on the
flood plain so farmers have to
buy fertilizers - pollute river.
Political 1. 50000 Nubians forced to leave
their homes as they were
flooded to form Lake Nasser
Major LEDC flood - Bangladesh, 2004
Bangladesh is a low-lying country most of whilch lies on the delta land of three major
rivers, the Ganges, Brahmaputra and Meghna. The sources of these rivers are in the
Himalayas so snowmelt adds to their discharge in spring.

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At times during the rainy season, Bangladesh suffers from tropical revolving storms that
bring exceptional winds, intense rainfall and storm surges. Such conditions severely
affect the discharge of the three rivers and their distributaries, causing regular floods.
Human factors have played an increasing role in the severity of floods in recent decades.
As in more developed countries, urbanisation has occurred and the capital city Dhaka now
has a population of more than 1 million.…read more

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· may make flooding
embankments to include agriculture worse, when
compartments for embankments are
floodwater storage breached flood water
cannot get back into river
· the scheme would also
cut off large areas of
wetland therefore losing
fishing trade
· very expensive
better flood forecasting · help victims of flood and
and warning schemes help people to prepare
improved flood shelters · much cheaper than hard
engineering projects
· avoid political difficulties
· less likely to interfere with
ecosystem
1998
Causes
Physical · only 1m…read more

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Physical · 57% of land flooded
Effects · water receded
· Destroyed crops
· Wrecked roads, bridges and destroyed villages
Socio-Ec · 1300 people killed
onomic · 7 million homes destroyed
Effects · 25 million homeless
· shortage of drinking water and dry food
· diseases spread cholera dierrhoea etc.
· capital dhaka 2m underwater
Boscastle 2004
On Monday 16th August 2004 it experienced a dramatic flash flood event in the middle of
the afternoon.…read more

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Surrounding vegetation includes agricultural land with limited interception storage, although
there is some forestry along the riverbanks. (So conditions would have been even
worse,without these patches of woodland!)
· The rain coincided with high tide in the bay. This restricted the rate of exit of floodwater into
the harbour.
S.H.E.E.…read more

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Advantages Disadvantages
· Growth of tourism is now worth ten · Problems with salinity in irrigated areas such as
times more than profits from power Gila valley caused by evaporation of water from
generation. the land surface leaving behind salts
· Development of new tourist areas · The high salinity of the water entering mexico,
such as Lake Harvusa City where up to 3000 parts per million making it unsuitable
old london bridge was re-erected.…read more

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Population
CASE STUDY: UK's Ageing Population
Background Info:
In 2008, the UK's population was estimated to be 61,399,118.
In 2006, there was a record 1.2 million people aged over 85.
Over the last 30 years the average life expectancy for men has risen from 69 to 75, while for
women it has risen from 76 to 80.
Within 20 years, it is reckoned that 1 in every 4 people will be a pensioner.…read more

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The one child policy was introduced in 1979, trying to restrict the number of children married
urban couples can have to one. This is because China was and still is very overpopulated to
the point where they may have a population explosion.…read more

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This means that they will look after them in old
age. If your child is a girl you will not have anyone to look after you in old age.
'Little Emperor Syndrome' there is a concern that many of the single children are being badly
spoilt possibly creating a future society of selfish people.…read more

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As you can see, the amount of children being born has decreased significantly, meaning the
birth rate has decrease, giving an overall decrease in population.
The Future
China's one child policy so far has been very efficient. However, will this continue? Here we
have an estimated population pyramid for China for 2050:
The amount of children being born has decreased even more, but the number of elderly
people has increased significantly.…read more

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