汶川地震极重灾区景观生态恢复影响因子分析
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摘要
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 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.
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.
引文
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[2]丁国栋.区域荒漠化评价中植被的指示性及盖度分级标准研究——以毛乌素沙区为例[J].水土保持学报.2004,18(1):159-160.
[3]Adams J E A G F.A Light Interception Method for MeasuringRow Crop Ground Cover[J].Soil Science Society ofAmericaJournal,1977,41(4):789-792.1977,41(4):789-792.
[4]吴云,曾源,吴炳芳,等.基于MODIS数据的三北防护林工程区植被覆盖度提取与分析[J].生态学杂志,2009,28(9):1714-1718.
[5]陈云浩,李晓兵,史培军.北京海淀区植被覆盖的遥感动态研究[J].植物生态学报,2001,25(5):588-593.
[6]陈巧,陈永富.Quickbird遥感数据监测植被覆盖度的研究[J].林业科学研究,2005,18(4):375-380.
[7]王晶晶,白雪,邓晓曲,等.基于NDVI的三峡大坝岸边植被时空特征分析[J].地球信息科学,2008,10(6):808-815.
[8]夏照华,张克斌,李瑞,等.基于NDVI的农牧交错区植被覆盖度变化研究——以宁夏盐池县为例[J].水土保持研究,2006,13(6):178-181.
[9]苗正红,刘志明,王宗明,等.基于MODIS NDVI的吉林省植被覆盖度动态遥感监测[J].遥感技术与应用,2010,25(3):387-393.
[10]赵英时.遥感应用分析原理与方法[M].北京:科学出版社,2003.
[11]欧阳志云,徐卫华,王学志,等.汶川大地震对生态系统的影响[J].生态学报,2008,28(12):5801-5809.
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