Assessing On The Ecological Environment Vulnerability With RS And GIS In The Lakeside Of Tai Lake

Lakefront and its buffer zone is land ecotone, they have always been the most concentrated areas of human activity, they are also the planet's most fragile wetland ecosystems. Taihu Lake Lakefront and buffer zone have been severely damaged, its environmental functions, ecological functions, economic and aesthetic value have been significantly weakened. Now some of the technical system including the littoral zone habitat improvement, aquatic vegetation recovery, system recovery functions has been developed to eliminate ecological vulnerability, prevention lake degradation. This study based on Lakefront ecological restoration and buffer Lakeside construction technology and engineering demonstration topics. Under this background, select the Lakefront of Taihu Lake as a study area, study in vulnerability assessment of ecological environment.The main contents of thesis are: 1) Based on RS, GIS technology, Using 1978, 1991,1996,2000,2005,2008, six times the land use interpretation of remote sensing data, and ecological aspects of water quality data, selection pressure - state - response model (P-S-R), combined the analytic hierarchy process (AHP) and Fragile Environment quantitative analysis methods, assessment with the ecological environment vulnerability of Lakefront in 30 years. 2) Based on land use zoning, building three indicators evaluation index system include the social, physical chemistry, ecology, with a comprehensive vulnerability assessment Entropy approach, Lakefront District in 2008 with the vulnerability of the ecological environment was evaluated.Evaluation results obtained: the period 1978 to 1991, with a light fragile ecological environment in Taihu Lake Lakefront, After 1996, vulnerability increased year by year, ecological environment of Taihu Lake Lakefront with a strong fragile state in 2008, In which the northern Meiliang Bay Area has the most strong vulnerability, the presentation of overall vulnerability trend is increased from the northwest Lake to the southeast Lake, results consistent with the actual situation in the region.In this study , the formulation varies by type and region of Taihu Lake Lakefront and its buffer zone ecological control and operation management program has guiding significance,and provides a theoretical reference for vulnerability of the ecological environment to other lakes lakefront zone.