...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences >MEASURING SURFACE DEFORMATION IN GLACIER RETREATED AREAS BASED ON PS-INSAR – GELADANDONG GLACIER AS A CASE STUDY
【24h】

MEASURING SURFACE DEFORMATION IN GLACIER RETREATED AREAS BASED ON PS-INSAR – GELADANDONG GLACIER AS A CASE STUDY

机译：基于PS-INSAR的冰川退缩地区表面变形测量-以格拉丹东冰川为例

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Glaciers are retreating in many parts of the world as a result of global warming. Many researchers consider Qinghai-Tibetan Plateau as a reference for climate change by measuring glaciers retreat on the plateau. This retreat resulted in some topographic changes in retreated areas, and in some cases can lead to geohazards as landslides, and rock avalanches, which is known in glacier retreated areas as paraglacial slope failure (PSF). In this study, Geladandong biggest and main glacier mass was selected to estimate surface deformation on its glacier retreated areas and define potential future PSF based on PS-InSAR technique. 56 ascending and 49 descending images were used to fulfill this aim. Geladandong glacier retreated areas were defined based on the maximum extent of the glacier in the little ice age. Results revealed a general uplift in the glacier retreated areas with velocity less than 5mm/year. Obvious surface motion was revealed in seven parts surround glacier retreated areas with high relative velocity reached ±60mm/year in some parts. Four parts were considered as PSF potential motion, and two of them showed potential damage for the main road in the study area in case of rock avalanche into recent glacier lakes that could result in glacier lake outburst flooding heading directly to the road. Finally, further analysis and field investigations are needed to define the main reasons for different types of deformation and estimate future risks of these types of surface motion in the Qinghai-Tibetan Plateau.
机译：由于全球变暖，世界许多地方的冰川正在退缩。许多研究人员通过测量高原上的冰川退缩，将青藏高原视为气候变化的参考。这次撤退导致退缩地区的地形发生某些变化，在某些情况下可能导致地质灾害，如滑坡和岩石崩塌，这在冰川退缩地区被称为冰川滑坡破坏（PSF）。在这项研究中，选择了格拉丹丹最大和主要冰川质量来估计其冰川退缩区域的表面变形，并基于PS-InSAR技术确定潜在的未来PSF。使用56张升序图像和49张降序图像来实现此目的。格拉丹丹冰川退缩的区域是根据小冰河时期冰川的最大范围确定的。结果表明，冰川退缩区的总体隆起速度小于5mm /年。在冰川退缩区周围的七个部分中发现明显的表面运动，某些部分的相对速度高达±60mm /年。四个部分被认为是PSF潜在运动，其中两个部分显示了在研究区主干道潜在的损坏，如果岩石雪崩进入最近的冰川湖可能会导致冰川湖爆发的洪水直接流向道路。最后，需要进行进一步的分析和现场调查，以确定不同类型的变形的主要原因，并估计青藏高原这些类型的地表运动的未来风险。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号