Spatial structure of desertified land based on fractal theory: Taking Duolun County, Inner Mongolia as an example
Spatial information was obtained for different periods and different types of desertified land Duolun County,Inner Mongolia.In this paper,the intrinsic mechanism of mutual conversion of different types of desertified land is revealed by computing relationship between perimeter and area of patches,fractal dimensions and stability indexes etc.on the basis of principles and methods of fractal theory.The results show that the types of desertified land in different periods in Duolun County,Inner Mongolia,have fractal structure,with the average values being 1.3988~1.5635,which are close to random value,thus desertified land are prone to a flowing trend.The desertified land is identified into four types,i.e.,weak,median,serious and more seriously desertified land,among them,fractal structure of weak desertification has increased in the form of fluctuation,suggesting that spatial structure of weak desertification has become more and more complex and that the stability has decreased;while the stability of spatial structure of seriously desertified land has increased since 1987,and the stability is relatively high.Analysis of spatial structure of desertification land in this paper can provide the basic theory for the governments to control desertification.
fractaldesertified landspatial structureDuolun County of Inner Mongolia