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| Spatial pattern variation of soil erosion in Three Gorges Reservoir Area based on fractal theory |
| Wang Tao1, Huang Zijie1 , Wu Changguang1, Zhou Zhixiang1, Xiao Wenfa2, Wang Pengcheng1，3 |
| 1. College of Horticulture and Forestry, Huazhong Agricultural University, 4300701 Wuhan；2. Research Institute Qf Forest Ecology Environment and Protection,Chinese Academy of Forestry ,100091 ,Beijing：China |
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Abstract Using RS and GIS technology, the distribution of soil erosion intensity in Three Gorges Reservoir Area was revealed in 2000 and 2009 respectively. The variation of spatial pattern of soil erosion were analyzed by using fractal theory. The results showed that ： 1 ) The area of slight erosion was the largest in the study area with a significant increase from 2000 to 2009，vice versa with a decrease in other erosion grades; 2) The spatial pattern of soil erosion in this area showed fractal characteristics. The complexity of spatial pattern in all erosion grades had different changes during last 10 years, decreasing in slight and low erosion grades and increasing in the grades over mediate erosion ； 3 ) The stability of spatial pattern was the highest in the extreme erosion grade with values of 0. 489 2 and 0. 463 6 in 2000 and 2009 respectively. Except the slight and low erosion grades, the spatial structure stability of all erosion grades declined gradually.
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Received: 15 November 2010
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