首页> 外文期刊>Natural hazards and earth system sciences >Airborne geophysical survey of the catastrophic landslide at Sto?e, Log pod Mangrtom, as a test of an innovative approach for landslide mapping in steep alpine terrains
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Airborne geophysical survey of the catastrophic landslide at Sto?e, Log pod Mangrtom, as a test of an innovative approach for landslide mapping in steep alpine terrains

机译:在Log Pod Mangartom的Sto?e发生灾难性滑坡的机载地球物理勘测,作为对在陡峭高山地形中进行滑坡测绘的创新方法的测试

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Airborne geophysics is a promising method for investigating landslides. Here we present a case study of multisensor airborne geophysical survey at the catastrophic landslide Sto?e near Log pod Mangrtom in Slovenia, which was conducted in the framework of the European FP7th Project "SafeLand". Based on the survey itself and achieved results, we discuss applicability, limits, and benefits and costs of the method for investigating landslides in steep alpine terrains. Despite of several operational constraints, the airborne electromagnetic survey of the area well presented the lithological pattern and water saturation. The high resistivity regions mostly indicated drained slope scree and landslide mass, drained and loosened material of the moraine deposit in the tension zone of the landslide with present cracks and cavities. The minima of the resistivity pattern were attributed to the outcrop of marls rich in clay, to water-saturated moraine deposit above impermeable marls in the tension zone, and to water-saturated porous alluvial gravel and landslide scree along the Koritnica River. The magnetic survey proved to be inapplicable for such a small and rough area. The Potassium and Thorium maps, on the other hand, both well identified the regions of tension inside the landslide zone, outcrops of marls and dolomite, clay-rich colluvium, weathered zones along a regional tectonic fault, and alluvial deposits and deposits of debris flows, and the minima of the 137Cs clearly revealed the zones of material removal due to recent mass movements.
机译:机载地球物理学是一种研究滑坡的有前途的方法。在这里,我们介绍了在欧洲FP7计划“ SafeLand”框架下对斯洛文尼亚Log pod Mangrtom附近灾难性滑坡Sto?e进行的多传感器机载地球物理勘测的案例研究。基于调查本身和取得的成果,我们讨论了在陡峭的高山地形上进行滑坡调查的方法的适用性,局限性以及收益和成本。尽管存在一些操作上的限制,但该地区的机载电磁勘测仍显示出岩性和含水饱和度。高电阻率区域主要表示排水斜坡碎石和滑坡体,滑坡张紧区内冰ine沉积物的排水和疏松材料,存在裂缝和空洞。电阻率模式的最小值归因于富含粘土的泥灰岩的露头,张力区内不可渗透的泥灰岩上方水饱和的冰ora沉积物,以及沿着Koritnica河的水饱和的多孔冲积碎石和滑坡碎屑。事实证明,磁测量不适用于如此小的且粗糙的区域。另一方面,钾和Thor的地图都很好地识别了滑坡带内部的张力区域,泥灰岩和白云岩的露头,富含粘土的砾岩层,沿区域构造断裂的风化带以及冲积物和泥石流沉积物。 ,而137Cs的最小值清楚地揭示了由于最近的质量运动而导致的材料去除区域。

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