Study On PRED System Evolution In Jixi County Based On GIS

The object of study on regional sustainable development is regional composite PRED system , which is composed of Population(P),Resources(R),Environment(E) and Development(D). The aim of study on regional sustainable development is to discover the structure, function, dynamic evolution and interaction of the elements of PRED system, and to approach the strategy and controlling measure to assure sustainable development, Region is the main place to carry out sustainable development. When administrative functional regions become basic organizing units, the multiple management of the factors of Population, Resources, Environment and Development is efficient. As a heavy-populated country, china is faced with economic system reform, and the elements of PRED system are full of contradiction. County level administrative units are key segment of sustainable development, so it is urgent to study county level PRED system evolution. Jixi County, birthplace of Hui culture, was very famous in history. Long-term unreasonable exploitation result in natural, social and economic problems. So it is typical and significant to study PRED system evolution in Jixi County.Based on geographic information system and quantitative analysis, the evolution and spacial difference are studied in this thesis. Complicated PRED system is oversimplified to investigate its dynamic evolution law and interaction mechanism. The followings are studied.1. Studies on evolution of PRED system in Jixi County. The indicators are selected by Principal Component Analysis. The weights of index are determined by Improved Analytical Hierarchy Process, the index of PRED system are calculated by Comprehensive Evaluation Model, which is -the basis of analysis on the evolution of PRED system form 1981 to 2000 in Jixi County. The interaction mechanism of PRED system and its sub-systems are approached by Correlation Analysis. The trace of PRED evolution is analyzed by Gray model.2. Studies on spacial evolution of PRED system in Jixi County .The special data base of village and town is established by Geographical Information System. The basic data base of village and town during 1985-2000 is established by Data Base Management System. Through the exclusive spacial analysis function, spacial data base and attribute data base are mated into a spacial-attribute -unified data base. Then the spacial evolution maps and dynamic type map of PRED system are formed ,and spacial difference and evolution law are further studied.3. Studies on sustainable development tactics of PRED system in Jixi County. On the basis of the results of study on spatio-temporal evolution of PRED system in Jixi County, the tactics of sustainable development are put forward, which is the foundation and carry out sustainable development strategy.The study methods of this thesis have certain 'referential value for study on PRED system evolution in other Counties .The results of this thesis not only have particular reference for similar mountain counties to go a sustainable developing way , but also provide more possibility for governments and relevant departments to launch application researches.