A Study On Wetland Function And Changes Of Wetland Landscape's Structure Of Wuhan City

Wetland is a natural body existing between water and land as a transitional conformation, which has the richest biology diversity in nature, and is one of the most important surviving environment of human being. It is not only called as "kidney of earth" because it has tremendous function of water and element cycle, but also named as "biology supermarket" because of its big food meshwork and offering living environment for most biology in nature. But with expanding of the affection of global environment changing especially the change of land utilization and human activity, the area of wetland is reducing, the biology diversity is decreasing, and the wetland function is retrogressing. So it is great signification on wetland protection and restoration to research on the dynamic change of wetland and its function. The paper discussed the method and results of the research by RS(Remote Sensing) and GIS(Geographic Information System), and studied on the wetland function and landscape structure as well as its dynamic change in Wuhan city based on the theory and method of wetland landscape ecology. Using 1996 and 2001 remote sensing data as basic information resource and with the support GIS, a spatial information dataset is built up. Through selecting the indices such as patch size, fractal dimension, fragmentation, diversity and dominance index, etc., the dynamic development of wetland landscape pattern is analyzed. At the same time, the simulation for transformation of wetland landscape types using Markov process has done. Through the above work we attempt to search after reasonable method of protecting and restoration of wetland in Wuhan. The status of wetland resources, the wetland landscape structure and its dynamic change tendency have been got by the following step. At first interpreting the wetland type of the same area but different periods on the image from RS, And then analyzing and processing the results of the interpretation with the help of CIS software, and thus getting the surveying outcome about wetland landscape, at last comparing and analyzing the above results timely and accurately.