Study On Land Use Change In The Urban Fringe Of Wuhan City Based On GIS

With the influence on environment change by man's exploitation, the problems of population, resources and environment are intensifying, which lead to remarkable land use change. During all the studies of all kinds of regional land use change, the one influenced by urbanization is most important to us because urban fringe lies in transitional region between urban and rural. It is the fragile area of environment and also the joint area of human factors, and shows the rapid and unsteady characters in different time and space. Finding out the changing situation of urban fringe's land use timely will be beneficial to the urban planning's realization. Taking Jiangxia district of Wuhan city ad a case, land use change in the urban fringes is studied by GIS technologies. The purpose of the study on land use change and the driving forces is to make people understand and handle the contradiction between economic development and resources protection correctly. Arable land protection should coordinate with population and economy in the future, which is valuble for other urban fringes. The following are studied in this thesis:1. The functions of GIS are elaborated, such as managing spatial data and attribute data, spatial analyzing and outputting ultimate maps. Spatial data and attribute data are mated into land dynamic change database by analyzing land use map, investigating data and statistic data. The reasons of land use change are discovered by mathematic models. The results indicate that the area of urban residential and industrial land, garden land are extended rapidly; the area of arable land and unexploited land are decreased obviously.2. The driving forces of land use change are approached by analyzing social and economic factors in Jiangxia district. The results indicate that the land-use/ land-cover changes in the urban fringe are affected collectively by many factors in different scales. Human activity changed the landscape characteristics of the fringe ad a whole and the rapid economic increase and fast urbanization were the keydriving forces of the land-use/land-cover change in the urban fringe area. In addition, the increase of GDP and investment of the urban area and the structure adjustment in the primary industry of the rural area have the direct influence on the land-use/land-cover in the regional scale.3. Based on all the analysis, the frame of sustainable development of the land use in urban fringes is put forward, which provides scientific basic for benefiting from land resources.