Reactivation of mass movements in Dessie graben, the example of an active landslide area in the Ethiopian Highlands

Reactivation of mass movements in Dessie graben, the example of an active landslide area in the Ethiopian Highlands
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黛西地堑重新启动群众运动,这是埃塞俄比亚高地滑坡活跃地区的一个例子

DOI:
10.1007/s10346-015-0613-2
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发表时间:
2015
期刊:
影响因子:
6.7
通讯作者:
Vilímek
Vilímek
中科院分区:
地球科学2区
文献类型:
--
作者:
Vařilová;Kropáček;Zvelebil;Štastný;Vilímek

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德西镇位于一个构造凹陷沿着西部裂谷边缘与年轻,高能量救济。研究区域过去因多次山体滑坡而闻名。这些滑坡的类型各不相同,从浅层土壤蠕动到具有明显后果的巨大深层滑坡。山体滑坡危及快速发展的德西地区中心及其基础设施。从2013年起,选择了四个典型的近期滑坡,并利用遥感和实地观测进行了详细研究。所描述的重新激活和新的滑坡事件是由自然影响和人类活动共同造成的。由于季节性降雨是主要的外部触发因素,因此对Dessie气象站的降雨数据进行了分析。并讨论了人为因素对边坡失稳的影响程度。确定了研究地点的危险区和实际风险,并提出了适当的措施。
Dessie town is located in a tectonic depression along the western rift margin with a young, high energy relief. Study area is known for numerous landslides in the past. These landslides are of different types, from shallow soil creeping to huge deep-seated landslides with appreciable consequences. Landslides endanger the quickly growing regional centre of Dessie and its infrastructure. Four typical recent landslides have been selected and studied in detail using both remote sensing and field observations from 2013. The described reactivation and new landslide events have been caused by a combination of natural influences and anthropogenic activities. Since seasonal rainfall is the main external triggering factor, precipitation data from Dessie weather station were analysed. The degree of negative human impact on slope instability was also discussed. Endangered zones and the actual risk in the studied localities were identified, and adequate measures were proposed.
利用埃塞俄比亚 Dessie 的超高分辨率多方位 TerraSAR-X 图像检测暴雨引发的山体滑坡
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