Font Size: a A A

Analysis On Urban Land Use/Land Cover Change By Using GIS And Landsat TM/ETM+ Images--The Case Of Shijiazhuang City, China

Posted on:2003-01-06Degree:MasterType:Thesis
Country:ChinaCandidate:J Y XiaoFull Text:PDF
GTID:2156360065450024Subject:Physical geography
Abstract/Summary:PDF Full Text Request
In the recent decades, the research on ground surface land use/land cover change has been become an important aspect of global change, or mainly, global wanning studies, since land-use change is a major drive of global change, through its interaction with climate, ecosystem processes, biogeochemical cycles, biodiversity, and, even more important, human activities. And, LUCC was, therefore, also treated as one core project of the IGBP programme. Also, in the last decade, much attention was paid to urban land use change because the ecosystem in urban area is severely impacted by human activities.Shijiazhuang is the biggest city in Hebei province, China; it is the important transportation center in the Northern, too. However, it just was a small town of 60,000 population in 1925, and today, the population is up to 1,610,000. On the other hand, the urban area is also sprawled from 6.31km2 in 1934 to 165.5km2 in 2001. Therefore, it is necessary for urban planning, land survey, and etc. to analyze the characteristics of urban sprawl, the urban land use/land cover change, the driving forces resulting these changes, and some effect on urban environment.In the present study, multi-temporal maps of Shijiazhuang city from 1934 through 2001 are inputted into die GIS software, Maplnfo5.0, to analyze the temporal and spatial distribution of urban sprawl rate during its development history, to explore main driving factors influence to urban sprawling. Moreover, two scenes of remotely sensed images from Landsat5 TM and Landsat? ETM+, on Jun. 29, 1987 and May 10, 2001, respectively, are employed to detect the change of land use and land cover in Shijiazhuang region through ER Mapper6.0 software. After geometric correction and relative atmospheric correction, the images are classified into 9 classes as urban area, residential area, grain field, vegetable field, forestry, orchards, water body, sands/soil, and grass, by using maximum likelihood classifier. And then, the conversion matrix of land use between 1987 and 2001 is calculated and mapped. At last, the effects of land use change on the urban environment also are discussed. Here, some main conclusions are extracted and summarized as the follows.1) Historically, urban land sprawl of Shijiazhuang can be divided into 4 stages as slow growth stage (1034 ~ 1950), rapid developing stage (1950 ~ 1955), crawling increase stage (1955 ~ 1981), and speedy rising-up stage (1981-2001), and the annual111growth rates of these stages are 1.15km2, 3.65km2, 0.46km2, and 5.64km2, respectively.2) Spatially, urban sprawl can be categorized as 3 typical patterns: the pattern of urban sprawl by special purpose in special times, such as war age in 1934 to 1947; the pattern of urban sprawl intervened violently by administration, such as in the years of cultural revolution; and the pattern of normal growth in the recent two decades.3) In different develop stages, the maximum annual relative sprawl rate for the girding unit of lkm*lkm varies in a large range of 2.95 ~ 10.1%. During 1934 - 1947, the mean annual relative sprawl rate is 1.9%, with the maximum number of 7.2% distributed at the west of the city as military use; during 1947 ~ 1981, the mean value is 1.32%, with the maximum of 2.95 only, and distributed mainly at the northwest as industry area and the west side as administration area; during 1981 - 1991, however, the mean sprawl rate is 3%, and the maximum rise up to 9.75, mainly distributed at the southeast and the north side of ShiTai Line; in the latest decade, 1991~2001, the mean sprawl rate suddenly increases to 7.81%, and the maximum also reach to 10.1%, the sprawl areas with a high speed of more than 6.8% are mainly distributed at the northwest and southwest as residential use and the so-called high-tech developing ward at the east.4) It is demonstrated in the present study that a satisfying result of classification Shijiazhuang region as the 9 classes mentioned above can be obtained for the land use/ land cover change research by using a m...
Keywords/Search Tags:Urban sprawl, Land use/land cover change, GIS, TM, ETM+, Classification, Shijiazhuang city
PDF Full Text Request
Related items