摘要
针对黑河流域草原生态环境的特点,基于P-S-R模型,采用物元可拓理论和熵权法构建了草原生态安全综合评判模型,对黑河流域各县区草原生态安全进行了评价。结果表明:自黑河上游至下游,生态安全状况依次降低。肃南县和祁连县草原生态安全;民乐县和高台县较安全;山丹县稍不安全;肃州区、甘州区和嘉峪关市不安全;金塔县、临泽县和额济纳旗极不安全。各县区对不同因子的敏感程度也各不相同。图2,表4,参8。
Focusing on the characteristics of regional grassland eco-environment and main eco-problems of Heihe River basin, an integrated assessment model was constructed to assess the grassland ecological security in Heihe River basin with the support of entropy weight,matter-element model and extension engineering theory. The results indicated that the grassland ecological security status was greatly degenerated from the upper to the lower reaches of Heihe River. Among the eleven counties, Sunan and Qilian Counties had the least insecurity, Minle and Gaotai Counties were in the second place, however, Jinta, Linze and Ejina Counties had the highest insecurity. Different counties had different sensibility to the environmental factors. The results of this assessment were in good correspondence to the regional actual situations, indicating that matter-dement model was applicable in this field.
出处
《农业系统科学与综合研究》
CSCD
2009年第2期251-256,共6页
System Sciemces and Comprehensive Studies In Agriculture
基金
国家自然科学基金项目(40671061)
甘肃省自然科学基金项目(0710RJZA104)
关键词
生态安全评价
草原
物元模型
可拓工程
熵权
黑河
ecological security evaluation
grassland
matter-element model
extension engineering
entropy-weight
Heihe River