Spatio-temporal Changes Analysis Of Land Use In Pingdu County On RS And GIS

As the human activity has more effect on environment, the problem of population, resources and environment becomes more and more serious, and the change of land use caused by that is being given more attention. China is a country with a large population, the contradiction between population and land area is to be dissolved urgently, and which has become the bottle neck of economic development. So it is important to evaluate the spatio-temporal change of land use by mathematic model, to analyze the land use pattern, to find the driving factors of land use change, then we can accurately understand and handle the relationship of economic development and preservation of tillable land, and promote the regional land source to be utilizing sustainable.Based on data obtaining function of RS, data analysis function of GIS and the analysis method of land use change, this paper analyses the land use change of a bigger county in 14 years, and presents the various driving force affecting land use change. The study process, analysis methods and the main conclusions are as following:1. Applying RS data and GIS technique, we obtain the actual information of land use, and the vector database is formed by contact interpretation of RS image, digital of special map, input of attribute data, output of outcome map, establishing of topological relationship of spatial data and the editing of vector data, etc. The land use dynamic change databases have been set up by spatial analysis of land use map, combination of statistic data and linking of attribute data and spatial data.2. The spatio-temporal change characteristics of land use of Pingdu County during 1990～2004 have been researched by some models and index. Some mathematic models are used to analyze the spatio-temporal change of land use of this County, such as land use dynamic degree model, land use spatio-temporal evolution model and land use transferring matrix model. The spatio-temporal change characteristics of land use of Pingdu County during 1990～2004 have been researched by many models and indexes. Many index have been chosen to analyze the spatial change and its evolution of landscape pattern, such as landscape diversity index, dominant index, evenness index and fragment index. The analysis result shows that the area of tillable land, woodland, other agriculture land and unused land have been decreased; the area of garden land, residential land and industrial land have been increased, the landscape diversity index and evenness index have increased, and the dominant index has decreased.3. Based on canonical correlative analysis method, the land use pattern and driving force of land use pattern change of Pingdu County have been researched. Applying the canonical correlative analysis model of statistical software—STATISTICA, selecting some variants related to nature and economics, and to pursue the driving forces of present land use pattern and the change of land use pattern. The results indicate that it is mainly the economic development that caused the change of land use pattern.4. Prediction of the land use structure of Pingdu County has been carried out with the Markov chain model. The prediction shows that the ratio of tillable land is gradually decreasing, and the ratio of the residential land and industrial land is increasing. The results coincide with the economic development's demands.