摘要
毕节岩溶区属于典型的生态环境脆弱区,地表崎岖破碎,石漠化、水土流失严重,土地退化速度快,环境承载能力差,使岩溶区的社会经济发展与生态环境不相适应,造成岩溶区的可持续发展能力弱。以毕节岩溶区为例,选择影响该地区生态环境脆弱的15项重要因子作为评价指标,构建岩溶区生态环境脆弱性评价指标体系,然后运用主成分分析和聚类分析法对毕节岩溶区的8个县市进行生态环境脆弱性评价研究。结果表明,毕节地区8个县市中黔西县和金沙县为轻度脆弱区,毕节市、大方县、织金县和威宁县为中度生态脆弱区,赫章县和纳雍县为重度生态脆弱区。该划分结果与自然环境和社会经济状况基本吻合,可为该地区生态环境治理和恢复提供参考依据。
Bijie karst area is a typical eco-environmental vulnerable area with rugged and broken surface, rocky desertification and soil erosion being serious, land degradation speeding up, and enviromental bearing capacity being weak, which results in the disharmony between social economic development and ecological environment, and weaker sustainability of the karst area. In this paper, we took Bijie karst area as an example, and chose fifteen important factors which affected this fragile area as evaluation index to build up the evaluation system of karst area ecological vulnerability, then made evaluation research on the eco-environmental vulnerability of eight counties in Bijie karst area by making use of principal component analysis and clustering analysis. The result showed that among the eight counties, Qianxi County and Jinsha County could be regarded as mild fragile area, whereas Bijie city, Dafang County, Zhijin County and Weining County as moderate ones, Hezhang County and Nayong County as severe ones. The results was basically consistent with natural environment and social economic status, which could provide reference for the eco-environmental governance and recovery of this area.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第2期169-172,共4页
Guangdong Agricultural Sciences
基金
国家星火计划项目(2011GA820007)
贵州科技基金(黔科合J字[2011]2033号)
关键词
主成分分析法
聚类分析法
岩溶区
生态脆弱性
毕节
3rincipal component analysis
clustering analysis
karst area
ecological vulnerability
Bijie
