The Land Use/cover Dynamic Monitoring Ecological Environment And Driving Forces Of Meishan City, Sichuan Province

With China's rapid economic development, population increase, China's pattern of land use and land cover changes in the depth, breadth and speed of rendering to increase rapidly, the contradiction between economic development and ecological environment become more and more prominent, so it is important to carry out typical Ecological Environmental Dynamic Monitoring of Remote Sensing to recognize of global change. People's environmental awareness is growing, satellite remote sensing technology in the eco-environmental monitoring in the field of application has become necessary and urgent. The completion of this thesis based on the results of "dynamic monitoring of ecological environment in Sichuan Province,"Meishan City, Sichuan Province as the study area, LandSat-5 TM satellite image as the main source of information, the use of remote sensing image processing software ERDAS IMAGING and geographic information system software ARCGIS, using post-classification comparison and classification before the comparison of principal component analysis and spectral characteristics of variation method.The two methods combined to monitor the Meishan city land use from 2000 to 2007, the basic identification of the Meishan area changes in land use from 2000 to 2007.The thesis use of the current database and dynamic database between 2000 and 2007 to conduct time series and spatial sequence analysis, to get the 2000 and 2007 land use / cover area and the size of dynamic change and the degree of dynamic change. The results show that the accelerated urbanization process, returning farmland to forests and the grasslands as part of the implementation and the replanting of cultivated land slope and pepper, fruit trees and a series of economic crops and other reasons, the largest area of woodland increased, also the maximum degree of dynamic change and the increased number is xx.29 km2 ; the paddy field and dry land (part of farmland) has been reduced , the overall reduction is xx.72km2, which shows that while in the Forest protection must be harmonized fertile; bare land and other unused land in the 7 years increasingly being used, also has the greater degree of dynamic change;The water in lakes, farmland policy support has been enhanced, the increased number is xx.67 km2. In order to change visual observation data, set up by ARCMAP Meishan city 2000 and 2007 Land Use / Cover map, land use / cover distribution of the dynamic situation from 2000 to 2007. Use of data analysis combined with image specific grass, bare land, paddy fields and dry the whereabouts of 7 years, and through analysis of the Meishan county area into land use change types: grassland, farmland and bare land - forest type, land - building land-based and hybrid-type changes.Using SPSS statistical software on the Meishan city driving forces of land use correlation analysis, further study shows that Meishan city driven by the community are more obvious, the main town driven by the impact of demographic change, economic development and the government policy guide, especially the relevance of the biggest demographic change, we must firmly implement the national policy of family planning. Economic development also has a greater impact in land use change ,so when economic development must focus on a reasonable allocation of land use, to achieve sustainable development.