Study on eco-system service value spatial structure and its change in Poyang lake area by 3S technology

In the Paper, the research range is Poyang lake area which is important position in the middle-lower reaches of Yangtze river and Jiangxi Province. Based on the RS and GIS technology, the paper uses Delphi method to determine the land use types eco-system service unit value, to study the relationship between land use change and eco-system service value. With the collected material, the paper adopts geography statistic method to estimate the influence between land use change and eco-system service value, to analyze the spatial distribution rule of eco-system service value. The result will be valuable to develop the society, economy and environment of Poyang lake area.