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Báo cáo " Research on the effect of urban expansion on agricultural land in Ho Chi Minh City by using remote sensing method "

Ho Chi Minh City is a one of the biggest cities of Vietnam. Before 1945, there were about 400,000 inhabitants living in the city. During the last two decades, it became the biggest industrial and commercial center of the country. According to the statistics in 2005, its population was about 6.2 million people. In the suburban areas of the city, particularly in the northern part, agricultural activities produce the main income of these local residents. Within the last 15 years, due to urbanization and emigration . | VNU Journal of Science Earth Sciences 24 2008 104-111 Research on the effect of urban expansion on agricultural land in Ho Chi Minh City by using remote sensing method Tran Thi Van Institute for Environment and Resources VNU-HCMC Received 11 April 2008 received in revised form 13 July 2008 Abstract. Ho Chi Minh City is a one of the biggest cities of Vietnam. Before 1945 there were about 400 000 inhabitants living in the city. During the last two decades it became the biggest industrial and commercial center of the country. According to the statistics in 2005 its population was about 6.2 million people. In the suburban areas of the city particularly in the northern part agricultural activities produce the main income of these local residents. Within the last 15 years due to urbanization and emigration from other provinces the population explosion became a serious problem. The conversion of agricultural land into residential areas has increased more and more causing the change of land-use structure. This paper describes the capability of remote sensing for detecting and analyzing spatial changes as well as quantifying results to show the urban growth process and its impact on the land-use distribution in the northern part of Ho Chi Minh City. Keywords Agricultural land GIS Remote sensing Suburban Urban expansion. 1. Introduction Over the world the cities cover only about one percent of the earth s surface but most of the issues happening in the cities greatly impact on the environment and global change 7 . Urbanization leads to urban spatial expansion due to the demand for development and housing growth as well as facilities areas to serve human life. In Vietnam land use and land cover patterns have undergone a fundamental change due to rapid economic development under its reformative economic policies. Urban growth has been speeding up as a Tel. 84-8-8651132. E-mail tranthivan@hcmier.edu.vn result an extreme stress to the environment has occurred. This is .