基于RS和GIS的四川生态环境质量评价

合理的资源利用与良好的区域生态环境是实现社会经济可持续发展的重要基础和必要条件．本研究中利用RS和GIS技术及相关理论，建立区域生态环境综合评价指标体系，构建四川省生态环境本底数据库，然后利用主成分分析法确定评价指标的权重系数，建立区域生态环境评价模型，通过模型的空间叠加分析得到综合评价结果，根据评价结果将四川生态环境分为5级．分级结果表明：四川省生态环境东部明显好于西部，盆地好于山区，三州地区生态环境压力最大．这与四川各地的自然条件、气候因素、资源开发与利用有很好的相关性，与实地考察和资料分析的结果也相吻合，说明评价模型是科学客观的．

Eco- Environmental Synthetic Analyses Based on RS and GIS Technology in Sichuan Province

The reasonable utilization of resources and regional eco-environment is the important foundation and necessary to achieve sustainable development of social economy.With RS & GIS and some relevant theories,the author builds an index system of comprehensive estimation of eco-environment and the background database on eco-environment of Sichuan province and decides the weights of index by spatial principal components evaluation method.The regional eco-environment model has been constructed.Through overlay analysis of the synthetic assessment model of eco-environment,the synthetic assessment results have been achieved and classified to 5 grades by the eco-environment quality.The classification result indicates that the eco-environment quality turns to bad gradually from east to west,which has strong relativity compared to changing trend of nature condition,climate factor,and status of resource exploitation using.Moreover,the assessment result is consistent with the data analyses,which explains the assessment mode has scientific rationality and impersonal veracity.