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《Resources and Environment in the Yangtze Basin》 2011-11
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FAN Fei-de1,2,3,WANG Ke-lin1,2,XUAN Yong4,YUE Yue-min1,2(1.Key Laboratory for Agro-ecological Processes in Subtropical Region,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China;2.Huanjiang Experimental Station of Karst Ecosystem,Chinese Academy of Sciences,Huanjiang 547100,China;3.Graduate University of Chinese Academy of Sciences,Beijing 100049,China; 4.National Disaster Reduction Center of China,Ministry of Civil Affairs of the PRL,Beijing 100124,China)  
Because of the fragility of ecological environment and the influences of human activities,eco-environmental problems in karst regions are serious.It's necessary to identify the sensitive region that is prone to be degraded for ecological restoration and rehabilitation.Based on GIS,four sensitivity factors,that is,water and soil loss,rocky desertification,acid rain,and bio-inhabitation,were selected to assess the eco-environmental sensitivity.The degree of ecological sensitivity and their spatial distribution in karst regions of southwest China were explored with analytic hierarchy process(AHP) and comprehensive index.The results showed that the sensitivity of water and soil loss,rocky desertification and acid rain was generally high.More than 60% of karst regions were moderate and even more sensitive to water and soil loss sensitivity,rocky desertification,and acid rain sensitivity;while the sensitivity of bio-inhabitation was relatively low,with the proportion of 40% of insensitivity.Our study indicates that the sensitivity of eco-environment in karst regions of southwest China was high;more than 80% of karst regions are moderate and even more sensitive regions.The insensitive regions were mainly distributed in middle and south Hunan,southeast Hubei,karst peak forest plain of middle Guangxi,intermountain basin and valley of Yunnan and Guizhou.Geological setting,topography and climatic factors were the dominant factors affected the regional eco-environment sensitivity.
【Fund】: 中国科学院西部行动计划项目(KZCX2-XB2-08);; 国家支撑计划(2009BADC6B008);; 国家自然科学基金项目(41071340);; 教育部人文社科研究青年基金(11YJCZH201);; 湖南省社会科学基金(2010JD193);; 湖南省自然科学基金(10JJ5017)
【CateGory Index】: X826
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Chinese Journal Full-text Database 10 Hits
1 LUO Jun1,2,3,WANG Ke-lin1,2,CHEN Hong-song1,2,ZHANG Wei1,2(1.Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China;2.Huanjiang Experimental Station of Karst Ecosystem,Chinese Academy of Sciences,Huanjiang 547100,China;3.Graduate University of Chinese Academy of Sciences,Beijing 100049,China);SENSITIVITY OF WATER AND SOIL LOSS OF NORTHWEST KARST AREA IN GUANGXI PROVINCE[J];Resources and Environment in the Yangtze Basin;2009-06
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