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Comparison of land cover/use changes in recent 10 years in two watersheds of Wolong Naure Reserve |
YANG Juan1, GE Jian-ping2, TU Qiang3 |
1. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing, 100084; 2. College of Life Science, Beijing Normal University, Beijing 100875; 3. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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Abstract The conflicts between land use and ecosystem protection influenced the landcover change of Wolong Nature Reserve and its surrounding area. In order to examine the impacts of human activities on the land use/cover change of Wolong area, the landuse changes in recent 10 years are compared within watersheds. The results showed that the trends of the landuse change were different in the two watersheds and their subareas, details were as follow. 1) The total area of woods increased slightly in Shouxi and Yuzixi, while in Shouxi, the fragment degree of woods increased significantly and much higher than Yuzixi. The area of shrubs increased inYuzixi but decreased in Shouxi. 2) Subarea comparsion research showed the area increase of woods occurred outside of the nature reserve in Shouxi and inside in Yuzixi. The area decrease of grassland occurred inside the nature reserve in the two watersheds. 3) The trends of collective land use change rate in the two watersheds are converse with the buffer expanding. 4) The different transition probabilities of landuse change resulted in different transition directions in the two watersheds. According to the Markov model, the increase of woodland and shrubs and the decrease of grassland area will maintain in Shouxi in the next 10years. So do the increase of woodland and the decrease of farmland and shrubs in Yuzixi.
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Received: 25 April 2005
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