Abstract
The theory and characteristics of the fractal theory are described. The wetland data of the Beijing Wild Duck Lake in 1998, 2000 and 2002 were obtained on the basis of RS and GIS technology. Using the fractal dimension numerical model on two dimensional Euclidean space, the authors worked out the fractal dimension values and the stability levels of all kinds of wetland resources. The dynamic changes of wetland resources in the study area was finally obtained according to the physical meaning of fractal dimension and the level of stability. The results of the study indicate that marshes and lakes constitute the most key elements and also the most unstable wetland elements in wetland environments. It has been proved in practice that fractal theory has ample application scope in the study of wetland dynamic change. The fractal dimension and the level of stability can supply the decision-making basis for the appraisal of wetland environments and the sustainable utilization of wetland resources.
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