基于物元模型的吉林省西部生态环境脆弱性评价  

Evaluation of eco-environmental frangibility in West Jilin Province based on matter-element model.

作　　者：王明全[1,2] 王金达[1] 刘景双[1] 窦晶鑫[1,2] 

机构地区：[1]中国科学院东北地理与农业生态研究所 [2]中国科学院研究生院,北京100039

出　　处：《生态学杂志》2007年第2期291-295,共5页Chinese Journal of Ecology

基　　金：国家重点基础研究发展规划资助项目(2004CB418507)。

摘　　要：从水资源条件、自然灾害和土地“三化”(沙漠化、盐碱化和草原退化)3方面出发,选取10项能反映吉林西部生态环境脆弱性而彼此之间相互独立的指标建立物元模型,采用物元模型和熵权法对吉林西部各县市生态环境进行了脆弱性评价。结果表明1985—2000年吉林省西部乾安县、扶余县、长岭县整体生态环境脆弱性相对较轻为Ⅰ级;大安市、前郭县生态环境脆弱性为中等Ⅱ级;脆弱性较重的地区有洮北区、镇赉县、洮南市、通榆县,脆弱等级为Ⅲ级。整体而言,吉林西部松原市各县环境脆弱性要好于白城市各县市。各县市对不同因子的敏感程度也各不相同,水资源条件脆弱性较重的地区为大安、通榆;自然灾害较为严重的地区为洮北、镇赉、洮南、通榆、乾安;土地“三化”现象幅度最大的地区为洮北、洮南、前郭。West Jilin Province is a typical area of the ecotone between agriculture and animal husbandry with frangible eco-environment. From the aspects of water resources, natural disasters and land degradation, 10 indices were selected to establish matter-element model for the assessment of eco-environmental frangibility in West Jilin Province. The results indicated that in 1985--2000, Qianan, Fuyu and Changling Counties had the least frangibility （level Ⅰ ）, Daan and Qianguo were in the second place （level Ⅱ ）, and Taobei, Zhenlai, Taonan, and Tongyu had the highest frangibility （ level Ⅲ ）. As a whole, the counties in Songyuan City were less frangible than those in Baicheng City. Different counties had different sensibility to the environmental factors, e.g. , Daan and Tongyu were most frangible in water resources condition, and Taobei, Zhenlai, Taonan, Tongyu and Qianan suffered most from natural disasters, while Taobei, Taonan, Qianguo were threatened by severe land degradation.

关 键 词：物元模型 吉林省西部 脆弱性 熵权法 

分 类 号：X826[环境科学与工程—环境工程]