三峡库区森林景观安全格局定量分析

以GIS为平台,充分利用我国森林资源清查资料和定位监测网络体系,扩展监测内容,从森林景观安全格局角度出发,按照层次分析法构建多层次评价指标体系,对三峡库区森林景观安全格局进行了定量评价,分析了森林景观破碎化程度、多样性、完整性和稳定性对区域森林景观安全格局的影响,其主要目标是评价具有不确定性的灾害或事件对森林生态系统及其组分可能造成的损伤,根据景观安全综合评价值结果,兴山县居库区各县之首,综合评价值达11.553,景观安全程度最高,石柱县、武隆县、秭归县评价值也超过了10,巴东、奉节、夷陵相对较高,重庆市区及周边地区只有5.788,其景观安全程度最低。

Quantitative Analysis of Forest Landscape Security Patterns at the Three-Gorges Reservoir Area

Based on GIS platform and the historical data of national forest resources investigation and the located monitoring network system, the forest landscape security pattern at the Three-Gorge reservoir area was evaluated quantitatively by using the multiple level evaluation indicator system established by means of Analytical Hierarchy Process (AHP). The effects of forest landscape fragmentation degree, diversity, integrity and stability on the regional forest landscape security pattern were analyzed. The main purpose is to evaluate the probably damage on forest ecosystem and its components caused by the uncertain disasters and events. According to the results of integrated risk evaluation, Xingshan County showed the highest value, with the integrated risk evaluation value reached 11.553. The values of Shizhu County, Wulong County, Zigui County were all above 10, that of Badong County, Fengjie County and Yiling County were also relative high, while that of Chongqing and surrounding areas was 5.788, that means these areas have the lowest degree of landscape security, and necessary measures should be taken to maintain the regional sustainable development and ecological security.