Showing posts with label case. Show all posts
Showing posts with label case. Show all posts

Wednesday, 23 May 2012

Coastline Under Pressure Case Study : Lyme Bay

What's meant by a coastline under pressure?
A coastline with a lot of human activity that can possibly damage the area.

Lyme Bay

Lyme Bay is a coastline on the South of England that is under pressure.

Scallop Dredgers
The Scallop industry is profitable and generates over £180,000/year. However, scallop dredging involves dragging heavy fishing equipment along the seabed. This causes high levels of physical damage. The dragging stirs up the sediment on the sea floor and smothers sensitive species.
In the long term, this can have a large effect on people who use the bay.


The Wildlife
Around Lyme Bay there are many natural habitats for animals, such as rocky reefs and the like. These areas have lots of sea-grass and maerl. Furthermore, these habitats are nursery grounds for commercially valuable fish. In turn, these fish are the food for sea birds such as the Auks and Gulls.
These habitats are extremely sensitive to physical damage, and must be looked after.

Anglers
Anglers bring a  large amount of money to the local economy, roughly £250,000/year. They mainly fish things such as cod and bass.
However, angling actually has a minimum impact on the marine habitat, but the fishing lines may snag sensitive species, such as Pink Sea Tanks.


Tourism
Tourism brings lots of money to the local economy which can be used on leisure services such as:
  • Sightseeing
  • Sailing
  • Waterskiing
  • Jet-Skiing
  • Power Boating
  • Wind Surfing
The problem is, that you need to have an an attractive and healthy environment to continue to attract tourists, so it is vital for Lyme Bay to remain safe and balanced.


Thursday, 26 April 2012

Bangladesh : Flood Defence Scheme [Case Study]

Bangladesh : Flood Defence Scheme [Case Study]


Causes:

Natural

  1. Monsoon Climate - Long periods of heavy rainfall. Up to 100mm/Day.
  2. Snow Melt - Rapid increase in river discharge.
  3. Low lying land - River Delta
  4. Cyclones - Regularly hit Bangladesh at speeds of 200 kph.

Human

  1. Deforestation
  2. Living on flood plains
  3. Global Warming

Effects

The floods in Bangladesh hugely affect and shape the country, some of the effects they cause are:
  • Disease
  • Building Damage
  • High Death toll. (140,000 die a year from floods)
  • Mass Movement
  • Crops Destroyed
  • Psychological Damage
  • Famine
  • Poverty

Protection Measures

Many warning systems are being setup in order to combat the floods and try to defend the inhabitants against them. For example:

- Satellite Tracking
- Officers in each village.
- Radio Warnings
- Warning Flag System.

In addition to simple warning systems, they also take action against it such as,
  • Strengthen embankments along the shore.
  • Plant mangrove trees along the shore to halt waves.
  • Build storm shelters on stilts. Each of these cost £80,000.
  • Educate the people to use the shelters. 
Furthermore, emergency aid is donated and used, things like food, water, blankets, medicine and shelters for the future.