Combining AHP with GIS in synthetic evaluation of eco-environment quality - A case study of Hunan Province, China
Combining AHP with GIS in synthetic evaluation of eco-environment quality - A case study of Hunan Province, China
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DOI：
10.1016/j.ecolmodel.2007.06.007
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发表时间：
2007-12-16
影响因子：
3.1
通讯作者：
Huang Dao-You
中科院分区：
文献类型：
--
作者：
Xiong Ying;Zeng Guany-Ming;Huang Dao-You
层次分析法(AHP)在多指标评价中具有独特的优势，而地理信息系统(GIS)在空间分析方面具有优势。将层次分析法与地理信息系统相结合，为区域生态环境评价研究提供了有效的手段。针对湖南省生态环境的区域特征和主要环境问题，建立了包括自然环境、灾害、环境污染和社会经济因素在内的综合评价指标体系。在地理信息系统的支持下，以县为评价单元，建立了区域生态环境信息系统数据库，并对湖南省生态环境质量进行了评价。在数据库和评价体系的基础上，将层次分析法、生态环境评价指数法和空间分析法相结合，对研究区的生态环境质量进行了评价。结果表明，湖南省35.2%的土地面积(约68462.45 km2)保持良好或较好的生态环境质量等级。然而，22.8%的总面积(约44345.00平方公里)的生态环境质量处于较差或较差的等级。在空间分布上，除少数地区外，生态环境质量自东向西逐渐降低，表现出明显的地形特征。结果表明，近年来湖南省生态环境整体质量处于中等水平，人类活动加剧了区域生态环境退化。(C)2007 Elsevier B.V.保留所有权利。
The analytic hierarchy process (AHP) has the special advantage in multi-indexes evaluation, and geographical information system (GIS) is good at spatial analysis. Combining AHP with GIS provides an effective means for studies of regional eco-environmental evaluation. Aiming at the regional features of eco-environment and main environmental problems of Hunan Province, the synthetic evaluation index system was set up including natural environment, disaster, environment pollution and social economy factors. Supported by GIS, taking the county as the evaluation unit, the regional eco-environmental information system database and evaluated the eco-environmental quality of Hunan Province were established. Based on the database and evaluation system, AHP, eco-environmental evaluation index method and spatial analysis were integrated into the eco-environmental quality evaluation in the study area. The results showed that 35.2% of the total land area in Hunan Province (approximately 68462.45 km(2)) maintains a good or better grade of the eco-environmental equality. However, 22.8% of the total area (approximately 44345.00 km(2)) was of a bad or worse grade of eco-environment quality. From the spatial distribution, the eco-environmental quality gradually decreased from the east to the west with exception in a few areas, which presented the obvious speciality of terrain. It was concluded that the current status of the integral eco-environment quality of Hunan Province was in the middle level, and highly intense human activities speeded up the degradation of regional eco-environments in recent years. (C) 2007 Elsevier B.V. All rights reserved.