汶川地震极重灾区景观生态恢复影响因子分析

2008年5月12日,四川汶川发生里氏8.0级大地震,地震不仅造成了大量的人员伤亡和财产损失,而且严重破坏了当地的生态环境。地震极重灾区位于四川盆地西北部与青藏高原东缘的过渡地带,是长江上游地区的重要生态屏障。因此,对极重灾区生态受损状况和震后生态恢复情况进行研究和分析,促进当地受损生态系统的科学合理恢复具有十分重要的意义。文章从景观生态学的角度出发,采用RS和GIS技术对极重灾区地震前后的植被覆盖度进行统计,通过植被覆盖度对研究区景观生态变化的反映,掌握极重灾区的景观特征和影响因子。

the Impact Factors of Landscape Ecological Restoration Eesearch of The Severest Disaster Area of Wenchuan Earthquake

The Wenchuan Earthquake of 8.0 magnitude at Richter scale hit large region of Sichuan,China on May 12,2008.Not only did it cause huge death,injuries and economy losses,but it ruined the local eco-environment badly.The severest disaster area of Wenchuan earthquake located at the transition zone from the northwest of the Sichuan Basin to the east of Tibet Plateau.It is one of the important areas for ecological defenses of the upstream area of Yangtze River.Therefore,researching and analyzing the ecological damage and the ecological restoration situations of the severest disaster area has very important meaning to promote the restoration of the damaged ecosystem effectively and scientifically.In this paper,with the perspective of landscape ecology,the vegetation fraction has been used to count the statistic of the severest disaster area with RS and GIS techniques and acquire the impact factors.