基于GIS的广西岩溶生态环境脆弱性评价  

Assessment of Karst Eco-environmental Vulnerability in Guangxi

作　　者：覃小群[1] 梁茂珍[1] 陈阵[1] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2005年第4期103-106,共4页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家科技攻关课题资助项目(2004BA606A08;2002A901A03)

摘　　要：以广西岩溶区为例,从导致岩溶生态环境脆弱性的本质因素入手,建立了岩溶生态环境脆弱性评价模型.选取碳酸盐岩分布面积百分比、地形坡度、地貌类型、土壤侵蚀强度、石漠化面积百分比、森林和灌丛覆盖率、旱涝片面积作为评价因子,利用层次分析法确定评价因子的权重,并以A rcG is 8 D esk top为平台,利用软件的空间分析功能,通过模型的空间关系识别,进行了广西岩溶生态区脆弱性评价.Karst landforms are wildly distributed in Guangxi autonomous region,with carbonate rock covering an area of 98 700 km^2 where the eco-environmental is very vulnerable. Karst areas in Guangxi are characterised by low environmental capacity,weak anti-hazard capability and poor stability. Fragile karst is one of main factors that restrict economic and the environmental sustainable development in Guangxi. Based on practical monitoring results of eco-environmental background and human activities in Guangxi, this paper sets up an evaluating index system of the vulnerable eco-environments. ＇The weight of each factor influencing eco-environmental vulnerability is determined with analytic hierarchy process method. Using spatical analyst based on ArcGis,through identify of spatial relationship between the datasets,assessment of eco-environmental vulnerability has been made. As a result, 3% areas in Guangxi karst region are extremely vulnerable grades,43% heavily and 44% areas moderately.

关 键 词：岩溶 地理信息系统 生态环境脆弱性 广西 

分 类 号：X142[环境科学与工程—环境科学]