摘要
采用RS和GIS技术,结合层次分析法,建立环境综合评价模型。利用该模型对延安市1997年、2004年的环境进行综合评价,将环境质量分为5级。结果表明:1997-2004年延安市环境质量明显改善;北部地区环境综合指数增长率高于南部地区。综合分析延安市土地利用数据表明,环境质量与土地利用状况密切相关,气象条件是影响环境的重要因素之一,退耕还林工程对环境的改善起着至关重要的作用。
In this paper, a comprehensive model is developed to evaluate the eco-environment quality in Yan＇an City in 1997 and 2004 using the RS and GIS means and analytic hierarchy process, and 5 grades of eeo-environment quality in the city are classified based on the evaluated results. The results show that the eco-environment in Yan＇an City during the period of 1997 -2004 was obviously improved; the eco-environment quality was decreased from the south to the north, and the growth rate of comprehensive index of eco-environment quality in the north was higher than that in the south. After analyzing the land use data and other evaluation results, it can be concluded that the eco-environment quality is closely related to land use, climatic condition is one of the factors affecting eco-environment quality, and the project of returning land for farming to forestry plays an important role in improving the eco-environment in Xi＇an City.
出处
《干旱区研究》
CSCD
北大核心
2010年第3期467-473,共7页
Arid Zone Research
基金
国家科技攻关项目"西北地区生态环境动态监测
综合评价和应用服务系统研究"(2004BA522D07-1)
