Assessment on Ecosystem Fragility of Karst Mountain Areas Based on Synthetic Method——A Case Study in Puding Country, Guizhou Province
详细信息
- 责任者：Shu Longcang (State Key Laboratory of Hydrology-Water Resources and Hodraulic Engineering ; Hohai University ; Nanjing 210098 ; China) ; Ke Tingting
- 刊名：Carsologica Sinica
- 出版年：2010
- 卷期：29(2)
- 关键词：生态脆弱性 ; ecological fragility ; 贵州 ; Guizhou Province
- 页码：p.141-144
- 图表：illus., 5 tables, 10 refs.
- 分类号：1800
- issnNo：ISSN1001-4810
- isbnNo：CN45-1157/P
摘要
Based on principle component analysis and taken 13 villages in Puding Country, Guizhou Province as the example ,the authors analyze 9 variables influencing ecological frangibility, and calculate the fragility with Euclidean distance formula. The results show that the cultivated area is the most important factor in determining the ecological vulnerable degree and its weighted value is up to 0.189, and the average gradient is the second factor. Among the 13 villages, there are 7 villages falling into severely or extremely fragile areas. Especially in Pianpo village whose vulnerable degree is maximum both in potential fragility and stress fragility. The study area evaluated as a whole is classified as severely fragile areas with a ecological fragile degree of 0.653. According to the standard of estimation grade, the authors find the Puding Country belongs to moderately fragile degree and we must take measures to recovery the eco-environment by controlling the land use for agricultural.
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