Causes Of Megacity

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In order to be considering a megacity, a city has to have over 10 million citizens in its metropolitan area (Bugliarello, 1999). Different reasons can be nominated as causes of cities become a megacity. People coming from rural areas trying to find a better condition of life maybe are the major reason of the population growth in most megacities. However, with a big agglomeration of people and a big city, the government has to not let the problems assume control of the city. Problems such as overpopulation, housing and natural disasters are common in every megacity and solve them are important to achieve a better quality of life and avoid or reduce environmental problems for the citizens. Every year, people move to city centres to achieve successful …show more content…
During the process of development of the megacities the offers for jobs increase in a very quick way; as a consequence, the rural exodus, which is a migratory pattern from people from rural areas going to urban areas, occur. However, at the same time the price of houses and apartments rise in a fast rhythm and those who do not find a job probably will not have money to afford a house. At this moment, poor people move from illegal areas, as a consequence, creating the slums. This problem have been happen in Brazil, especially in Rio de Janeiro and São Paulo since early 1970s (Camarano and Abramovay, 1998). In the beginning of the massive growth in Rio de Janeiro, the government tried to solve the housing problem building social houses in an area outside the city centre called City of God. It was an attempt to remove the poor people from the city centre; nevertheless, after ten years, the situation was already out of control again and all the planning was modified in a wrong way. For instance, the sidewalks were taken by the citizens to enlarge their property. Today, the City of God has over than 42.000 habitants (IBGE, 2010) and it is one of the biggest slums in Rio de Janeiro. A clever and challenger solution for housing problems was developed in Lagos, Nigeria. The project consists in build …show more content…
Earthquakes and floods are very common in Asian megacities and it is from there that some solutions come. Due to tectonic plates meet, megacities, such as Manila (Phillipines), Jakarta (Indonesia) and cities in Japan (Osaka and Tokyo), suffer violent earthquakes. The principal island of Philippines, where Manila is located, is located between geological faults and this brings serious instability for that area. Manila grew not been taken into consideration this natural problem. As a consequence, a stronger earthquake may destroy part of the city and kill many citizens (JICA et al, 2004). Nonetheless, with all problems, solutions should come and that is the case of Japan with high technology engineering to reduce the damage caused by earthquakes. Since 1917 Japan has been made effort to solve or soften the problem, now one of the solutions adopted is reinforce the build structure with concrete or steel-frame in all constructions except wooden houses. The wooden houses, which are flexible and can tolerate medium earthquakes, are the base of the research because in ancient time Japanese people have already suffered from earthquakes and also prevent from them (Koshihara, n.d.). Jakarta also has the earthquakes problems; however, another problem that concerns the government is the floods. Jakarta is surrounded by urban lakes, which connects to two main rivers (Ciliwung and

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