大庆市生态环境脆弱性空间格局

Spatial patterns of eco-environmental vulnerability in Daqing City.

以石油资源开采及加工为主要扰动,从敏感性及其应对能力两个方面建立了大庆市生态环境脆弱性评价指标体系,采用改进的熵值法确定各评价指标的权重,根据脆弱性评价模型函数分析了大庆市生态环境脆弱性空间格局.结果表明:2009年,大庆市生态环境敏感性较强区域集中分布在石油开采加工及石化产业密集区,土地盐碱化等生态问题是导致区域敏感性较高的次要原因;应对不利扰动能力的整体水平较高,在一定程度上起到了缓解生态环境脆弱性的作用;研究区脆弱性空间差异较大,其中红岗区、萨尔图区和龙凤区的脆弱性较高,脆弱度分别为0.80、0.71和0.68,让胡路区和大同区的脆弱性较低,脆弱度分别为0.20和0.04.

This paper established an index system for the assessment of eco-environmental vulnerability in Daqing City,from the aspects of sensitivity and response capability,and aiming at the major disturbances from crude oil exploitation and production activities.The improved entropy method was adopted to evaluate the weights of the indices,and the spatial patterns of eco-environment vulnerability in the City were analyzed,according to the model functions.In 2009,the more sensitive areas of the eco-environment in the City were mainly concentrated in the intensive regions of crude oil exploitation,processing,and petrochemical industry,and the ecological problems such as land salinization were the secondary causes for this higher sensitivity.The overall response capability of the eco-environment to unfavorable disturbances was relatively high,which reduced the eco-environment vulnerability to some extent.There was a great spatial difference in the eco-environment vulnerability in the City.The vulnerability was comparatively higher in the districts of Honggang,Sartu and Longfeng,with the degree being 0.80,0.71 and 0.68,but lower in Ranghulu and Datong,with the degree of 0.20 and 0.04,respectively.