Research On Ecosystem Service Value Based On The Catastrophe Progress Method In The Urban-Rural Fringe

The Urban-rural Fringe acts as two distinct ecosystems transition zone of the artificial and natural, its land use and ecological environment problems increasingly gain much attention. This article selected the LeiFeng Town, Huangjin xiang,xingcheng town and Bairuopu town as the study area which of the changsha urban fringes, based on ArcGIS, the land use vector data of the 2000,2008 and 2013 are extracted to analyze the land use structure and its dynamic changes. According to the actual situation of the Urban-rural Fringe, and by considering the ecological negative effect of the construction land and the following characteristics of the ecological system such as dynamic, correlation and cumulative vulnerability, the paper modifies equivalent value per unit area of ecosystem services and builds the evaluation model of ecosystem service value based on Catastrophe Progression Method, the method of Costanza’s evaluation formula to estimate the ecosystem service value (ESV) of the research area, and analyze its Spatial-temporal variation characteristics in that time period. Then, the correlation analysis was applied to explore the effects of land use types change on ecosystem services value in Urban-rural Fringe. At last, some feasible suggestions are put forward for reasonable planning of land use in the Urban-rural Fringe, by the analysis of the driving force factors of the ecosystem service value change in the study area, so as to provide ecological security for promoting the stable development of regional economy.The results ofthe research are as follows:(1) Land use is being in the development time, a large amount of cultivated land and forest land were transformed into construction land. On the whole, the area of cultivated land and forest area decreases rapidly, and the proportion of construction land is increasing.(2) The ecosystem services value presents a downward trend, with falling to 36.71 percent, the value of the single ecological service function value also has reduction of certain degrees. The changes of the ecosystem service value and the area of land use types are basically identical, ecological environment prone to degeneration generally.(3) There are obvious differences in towns overall spatial variation, on the whole the closer to downtown city, the more obvious variation, the higher the degree of urbanization, the more intense the contradiction between "economy" and "ecology".(4) The ecosystem services value is significantly correlated with the farmland, woodland, grassland and construction land at the level of 0.01, significantly correlated with water area and unused land at the lever of 0.05, and it’s positively correlated with the other land use types, except is highly negative to area of construction land. The absolute value of partial correlation coefficient in descending order is construction land, woodland, water, farmland, grassland, unused land.