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With reference to two contrasting types of hazard examine the extent to which prediction can reduce impacts.

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With reference to two contrasting types of hazard examine the extent to which prediction can reduce impacts. A hazard is a perceived natural event, which has the potential to threaten both life and property a disaster, is the realisation of this hazard. The term natural hazard is not a precise description as hazards are not just the result of 'natural' events. Natural hazards can be caused by the inability to recognise a potential hazard and to act accordingly The common characteristics of a natural hazard are that the origin of the hazard is clear and produces distinctive effects, which its warning time is short, that most losses to life and property occur shortly after the hazard, that in economically less developed countries the risk of exposure can be involuntary as people are forced to live in hazardous areas. However, in economically more developed countries, people occupy hazardous areas through choice, ignorance or necessity and that the disaster occurs with a scale and intensity that requires emergency medical response. ...read more.


This is due to population growth, economic growth and the increasing use of hazardous environments. In the 1970's and 1980's about three million people were killed by natural hazards and they affected a further 820 million people. They have also cost the global economy an estimated US $40 billion in losses and US $15 billion in relief and rehabilitation. Natural hazards claim more lives in poorer countries with over 90% of deaths occurring in developing countries. The impact of hazards in developed countries can have a greater economic cost but may cause fewer deaths. The effect of hazards in MEDCs will also be very different to their effect in LEDCs. The increase in the number of deaths from natural hazards is due to several factors: * Population growth and the use of marginal land for settlement. * A shortage of land due to environmental deterioration. * Economic growth creating new hazards such as chemical spills and radiation leaks. ...read more.


Now they use electrical pumps to irrigate. The floods not only provide the water for the fields but also carry a new layer of silt with it. The silt settles on the ground and the floodwaters retreat leaving the silt behind. The silt is a good nutrient for the soil that will help the next crop grow. This mainly occurred in the lower reaches of the Delta. In some areas of the Nile valley, flooding for agriculture is still used. Since the building of the Aswan High Dam, things have changed. The Dam was built to even out the flow of the Nile. Together with help of power-driven pumps, it was intended to expand the agricultural land along the Nile. As you can see from these case studies the impact, which hazards have upon a country, is due to its economic and technological level of advancement. MEDCs will have much less trouble than LEDCs in dealing with problems as they have the technology to predict events and to deal with events once they occur. ...read more.

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