摘要
基于"压力-状态-响应"(PSR)模型,选取泾河流域中下游的长武县、彬县、永寿县、淳化县、礼泉县和泾阳县为研究区域,进行了生态安全评价与分析。评价结果表明:研究区内各县的生态安全状况存在一定的差异,研究区的南部生态安全状况要好于北部。从行政单元看,泾阳县的生态安全指数最高,而长武县的生态安全指数最低;从地貌类型看,南部黄土台塬地区的生态安全状况好于北部低山丘陵区和黄土沟壑区。根据生态安全评价分级结果,泾阳县处于安全状态,淳化县、永寿县、礼泉县和彬县处于较安全状态,而长武县则处于较不安全状态。
Based on the ＂pressure-state-response＂ （PSR） model, in this paper the Changwu, Binxian, Yongshou, Chunhua, Liquan and Jingyang counties in middle and lower reaches of the Jinghe River Basin are selected as the study area to carry out the assessment and analysis of ecological security. The results show that there are some differences in ecological security between different regions, and the ecological security in the south of the study area is higher than that in the north. In a viewpoint of the districts, the ecological security index is the highest in Jingyang County and the lowest in Changwu County; in a viewpoint of landform types, the ecological security in the loess platform areas in the south of the study area is higher than that in the hilly and ravine areas in the north. According to the ecological security categorization, the ecology is in a security state in Jingyang County, a relatively security state in the Chunhua, Yongshou, Liquan and Binxian counties, but an insecurity state in Changwu County.
出处
《干旱区研究》
CSCD
北大核心
2009年第3期441-446,共6页
Arid Zone Research
基金
西北河谷平原土地生态安全动态与可持续发展途径(40771019)项目
关键词
生态安全
PSR模型
泾河流域
黄土高原
Jinghe River Basin
ecological security
PSR model
assessment.
