natural disasters

Topics: Volcano, Flood, Causality Pages: 4 (738 words) Published: April 4, 2014

Assignment on ⊸ “Natural Disasters, & its causes & effects”⊸

Diploma in Networking

By: Alam Abbas
ID: 000027586
Tutors’ name: Fathimath Mohamed



Define Natural Disasters

Natural disasters causes & its effects



Thank you


Natural Disasters is meant by natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life. Natural disasters happen all over the world and they can be utterly devastating for people’s lives and the environments in which they live. Although natural disasters are caused by nature and there is nothing that we can do to prevent them happening, there are many different natural causes that lead to natural disasters, and being aware of these causes enables us to be better prepared when such disasters do arrive.

Different Types of Natural Disasters
One common natural disaster is flooding, which occurs when a river bursts its banks and the water spills out onto the floodplain. This is far more likely to happen when there is a great deal of heavy rain, so during very wet periods, flood warnings are often put in place. There are other risk factors for flooding too: steep-sided channels cause fast surface run-off, while a lack of vegetation or woodland to both break the flow of water and drink the water means that there is little to slow the floodwater down. Drainage basins of impermeable rock also cause the water to run faster over the surface. E.g. In china 1931, flood on the Changjiang River took at least 145 000 people. (Other estimates go over a million, but we have not confirmed that.) Earthquakes are another common natural disaster that can cause many fatalities. The movements of the plates in the earth’s crust cause them. These plates do not always move smoothly and can get stuck, causing a build-up of pressure. It is when this pressure is released that an earthquake occurs. In turn, an...
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