【摘要】 针对5·12地震及快速灾后重建带来的生态环境变化,基于不同时相的遥感影像数据,构建研究区(北川县)生态环境综合评价体系结构,并提取相关变化信息,最终得出生态环境质量等级图。结果表明:地震及其次生灾害和灾后重建等使得北川县特别是东南部老县城附近地区、新县城重建地区生态环境受到一定程度的破坏,造成该地区环境质量的下降。更多还原

【Abstract】 In this paper,remote sensing images acquired from different phases as information source were used to estimate the ecological environment change in 5·12 earthquake disaster area.The index appraisal system was founded,and the related changes of ecological sensitive factors were collected.Thus the quality grade of the regional ecological environment can be valued by AHP to ascertain the weights of estimating factors.The results showed that earthquake,secondary disasters and post-disaster reconstruction have damaged Beichuan ecological environment to some extent(espically old county area in south-east and the new town of Beichuan County).更多还原