Land Use Change And Its Ecological Services Value In Tonghua City Of Jilin, China Based On GIS

In recent years, with the social economy developing and population increasing, the land use/cover change caused by the excess consumption of resources and the deterioration of the environment is paid more and more attention. Its negative ecological environment effect and social economic impact has already threatened the sustainable development of the human society seriously. Therefore, it is necessary for us to understand the dynamic change of land use/cover and its influence.Basec on this,the change of the ecological services value should be estimated. It is not only highly valuable for academic study ,but also an guiding role for people .Based on LandsatTM and ETM remote sensing images and Geoinformatical Information System(GIS) technology,the land use/cover information in the year 1986 , 1996, 2000 and 2008 of Tonghua City of Changbai Mountains in the southeast Jilin, China was abtained with the method of combining unsupervised classifiation and layered classification.The temporal and spatial dynamic characteristics of the land use/cover change and landscape change were analyzed during the whole study period using the models of transfer matrix,the changes of gravity center, comprehensive index of land use degree and the landscape index,such as landscape fragmentation index, landscape diversity index, landscape dominance index, landscape evenness index and landscape shape index ect. At last, the ecological services value of the land use/cover change in Tonghua city was evaluated and the effect of the land use/cover change caused by the change of ecological services value was analyzed with the method of ecosystem services value assessment,which provides basic data and decision-making basis for the sustainable development of the natural resources in the mountainous region and environmental protection.The results showed that the dominant type of land use in Tonghua city is woodland. Both the roll-in and roll out and the distance of shift route of gravity center of unused land are very notable during the 23 years .The urban areas,mining areas and rural residential areas were changed significantly and the grassland were highly fragmented. The land use degree illustrated a increasing trend,while the ecological services value decreased.