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khadija benmlah

on 31 May 2013

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Transcript of DROUGHT

GEOGRAPHICAL PROCESS OF A DROUGHT. A drought is a long period of below average rainfall. It is a period of continuous dry weather when there is not enough water for the uses needs. People use water in so many different ways and in such different quantities, there is no worldwide amount of rainfall that defines a drought. WHAT IS A DROUGHT? Drought affects farmers through a decline, or a loss of, the manufacture of crops and livestock. The drought of 1963-1968 affected large part of the continent and was the longest drought ever in the dry part of central Australia. The last two years of this drought saw a forty percent decline in the wheat harvest, the loss of twenty million sheep and a decrease in a farm income of around 500 million dollars. ECONOMIC IMPACTS BY: RAEANNE, KHADIJA AND AISHA DROUGHTS Why is Australia prone to
drought? Australia is considered to be an extremely dry continent. This is due to the variety of factors there is an accurate high pressure system located and found above the central part of Australia around the northern territory. Cool water located off the coast of Western Australia prevents rainfall in that part of the continent. Australia is also very flat continent, which leads to reduced orographic rainfall. Social Impacts The largest social impacts is the loss of income, it affects farmers and communities. In country towns for example, jobs may be lost and business may fail. People may be forced to leave drought affected area in search of other works. Many people which find other jobs usually never return. Lengthy drought and the heart break associated with it can result in the break up in families and severe depression in individual. Lack of rainfall, evaporation by the heat of the sun, absorption of moisture. There is no or little precipitation over a period of time, combined with, as a rule, though not all deserts are hot, will cause drought. Environmental
impacts Types Of Droughts Droughts have large impacts on the topsoil impacts of Australia. Millions of tonnes of topsoil is blown away due to the drought conditions. This loss takes many years to replace naturally, if it is ever replaced. The loss of topsoil can result in large areas that are far less productive. Many crop cultivation methods in Australia are not suitable in the country that is often affected by droughts. •Meteorological: referring to a lack of precipitation.
•Agricultural: referring to a lack of moisture in the soil where crops grow.
•Hydrological: referring to low levels of water in lakes and reservoirs.
•Socioeconomic: referring to water shortages affecting people in society (drinking water, running water). Farmers suffer and loose their jobs, due the lack of crops. Economical
Impacts How can we help? Droughts cannot be prevented. Droughts are natural disasters, and there is nothing anyone can do to prevent them. However, their effects can be reduced, by simple measures such as limiting unnecessary water use. BY: AISHA, RAEANNE AND KAHIJA:)
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