The Study On Dynamic Change Of The Value Of Wetland Ecosystem Services At Dayang River Based On RS And GIS Technology

Based on the TM images analysis of the Dayang River estuary wetland in the year1990and2010,with the support of RS and GIS technology, the dissertation studies the evolution ofthe wetland type and the change of the wetland service function. The dissertation uses theMarkov model to predict the Dayang River estuary wetland type in the year2020,2030,2040,2050and2060. It also predicts the wetland ecosystem service function ofthese years. The following is the introductions of the chapters of the dissertation.Chapter One, introduces the current situation of remote sensing in wetland research, thecurrent situation of wetlands ecosystem service function and the main contents of thedissertation.Chapter Two, introduces the data, the technology path and the pretreatment of the remotesensing images, which all used in the research.Chapter Three, sets up the categorizing system of the Dayang River estuary wetland,categorizes the TM images of Dayang River estuary wetland in the year1990and2010andgets the changes of the wetland type.Chapter Four, evaluates the service function value of the Dayang River estuary wetlandin the year1990and2010, obtains the spatial distribution of Dayang River estuarywetland’s ecosystem service function value and the changes of its service function value.Chapter Five,on the basis of Markov model, analyses and predicts the wetland types andservice function value changes of Dayang River estuary wetland in the year2020,2030,2040,2050and2060.The final chapter, summarizes the influence of the changes of wetland type for wetlandservice function value, which under the effects of the human being action. This paper alsosummarizes the method to improve ecosystem service function value of Dayang River estuarywetland.