摘要
植被盖度作为地表特征指数之一,其发育和分布特征受控于生态地质环境,而地质灾害又是生态地质环境不良作用的表现方式之一,二者存在一定联系。以地质灾害发育且危害严重的丹巴县为例,采用1999年和2006年二期卫星遥感数据,提取这二个时相的植被盖度图,以及1999年～2006年植被盖度变化图,采用地理信息系统技术,将地质灾害与二期的植被覆盖图进行叠加和统计分析。其结果表明,地质灾害主要分布在海拔较低,人类工程活动强烈的低植被覆盖和较低植被覆盖区域,且地质灾害在植被覆盖度减少的区域较之植被盖度不变和增加的区域,更加容易突发,研究结果与区内其它地质灾害工作成果吻合。
Vegetation cover is one of Earth's surface characteristics, and its development and distribution is controlled by eco-geological environment. Geo-hazard is one of adverse effects of eco-geological environment, thus there is a certain link between vegetation cover and geo-hazards. Taking Danba County as an example where there are serious geo-hazards, by collecting satellite remote sensing data in 1999 and 2006, extracting vegetation cover information and vegetation cover map between 1999 and 2006, and using Geographic Information System technology, the geo-hazards activities are overlaid with two periods of vegetation cover maps, and the statistics are analyzed. The research shows that geo-hazards mainly distribute in the low vegetation cover and relatively low vegetation coverage, where low altitude and strong human engineering activities are. More geohazards occurred in vegetation cover region than in increased vegetation cover or stable vegetation cover region. This result is consistent with other results in this region.
出处
《物探化探计算技术》
CAS
CSCD
2011年第2期217-221,110,共5页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金资助项目(40972225)
国家科技支撑"十一五"计划项目(2008BAK49B02)
国家863重点项目(2007AA120306)
关键词
归一化植被指数
密度分割
生态地质环境
叠加分析
丹巴县
normalized difference vegetation index
density segmentation
eco-geological environment
overlay analysis
danba county
