RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2004, Vol. 13 >> Issue (6): 604-610.

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ANALYSIS OF SECURITY INDICATIONS OF ECOLOGICAL AND ENVIRONMENTALSYSTEM IN MOUNTAINOUS AREA BY REMOTE SENSING AND GIS——A CASE STUDY OF ZHONGXIAN COUNTY,CHONGQING CITY

ZUO Wei1,2,CHEN Hong-ling1,XIONG Shang-fa3,LI Shuo2   

  • Received:2003-06-02 Revised:2003-12-02 Online:2004-11-20
  • Contact: ZUO Wei

Abstract: Effective acquisition and realtime extraction of data has always been a difficult problem in the study of regional ecological security and geographical processes．Based on the analysis of spectrum information of TM imageries for Zhongxian County，three main factors were extracted from remote sensing imageries：land cover，the extent of water and soil erosion and vegetation cover. The security indicator system of ecological and environmental system in mountainous area on county scale was analyzed．Then spatial analysis of these indicators was carried out by GIS．Technology and methodology were developed in the acquisition and extraction of security indicators of ecological and environmental system in mountainous area on middlescale county．This paper presented the temporal and spatial differences of some ecological security indicators in Zhongxian County and provided a new method for the evaluation of ecological and environmental degradation and ecological and environment recovery in mountainous areas．

Key words: indications of ecological security, remote sensing, GIS, Zhongxian County

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