当前位置：
X-MOL 学术
›
Earth Surf.Process. Land.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Effects of coastal erosion on landslide activity revealed by multi‐sensor observations
Earth Surface Processes and Landforms ( IF 2.8 ) Pub Date : 2020-06-29 , DOI: 10.1002/esp.4880 Issei Doi 1 , Sumio Matsuura 1 , Hikaru Osawa 2 , Tatsuya Shibasaki 3 , Shinichi Tosa 3
Earth Surface Processes and Landforms ( IF 2.8 ) Pub Date : 2020-06-29 , DOI: 10.1002/esp.4880 Issei Doi 1 , Sumio Matsuura 1 , Hikaru Osawa 2 , Tatsuya Shibasaki 3 , Shinichi Tosa 3
Affiliation
|
Coastal erosion is becoming an increasingly serious consequence of climate change. This study demonstrates the effects of coastal erosion on landslide activity while considering the amount of erosion and changes in pore water pressure. To determine the factors related to landslide slip generation, we specifically measured the displacement, deformation, pore water pressure, and amount of erosion with high temporal resolution (1 s–1 h) for a coastal landslide in Hokkaido, north‐eastern Japan, for 7 months. It has been determined that landslides occur simultaneously with high pore water pressure. Toe erosion events also occurred several times, while the landslide exhibited major displacement. Because toe erosion and the increase in pore water pressure occurred simultaneously, we tried to determine which of the two contributed majorly to the landslide displacement by conducting a stability analysis that incorporates the effects of the two factors. From the actual observed data, toe erosion and the increase in pore water pressure had comparable effects on the destabilization of the studied landslide. Specifically, the time series for the safety factor shows that the landslide in the case with toe erosion was destabilized more than that in the case with no erosion, with a difference of more than 5% in the safety factor. The model with toe erosion provided a better explanation for the landslide displacement. Furthermore, the inclination data suggested that erosion took place at least 1 month before the landslide displacement. This implied that coastal erosion played a role in the preparation and ongoing displacement of the coastal landslide. Inland landslides with toes that are subject to undercutting due to river incision or artificial construction have geomorphological settings that are similar to those of the studied landslide. The knowledge obtained here can contribute to the understanding of destabilization mechanisms and terrain changes related to such landslides. © 2020 John Wiley & Sons, Ltd.
中文翻译：
多传感器观测揭示海岸侵蚀对滑坡活动的影响
海岸侵蚀正成为气候变化日益严重的后果。这项研究证明了海岸侵蚀对滑坡活动的影响，同时考虑了侵蚀量和孔隙水压力的变化。为了确定与滑坡产生有关的因素，我们专门测量了日本东北部北海道沿海滑坡的位移，变形，孔隙水压力和侵蚀量，具有较高的时间分辨率（1 s–1 h）。 7个月。已经确定，在高孔隙水压力的同时发生滑坡。脚趾侵蚀事件也发生过几次，而滑坡表现出较大的位移。因为脚趾侵蚀和孔隙水压力增加同时发生，我们试图通过进行包含两个因素影响的稳定性分析来确定两者中的哪一个对滑坡位移起主要作用。从实际观察到的数据来看，脚趾侵蚀和孔隙水压力的增加对研究滑坡的失稳具有可比的影响。具体而言，安全系数的时间序列显示，脚趾侵蚀情况下的滑坡比无侵蚀情况下的滑坡更不稳定，安全系数相差超过5％。具有脚趾侵蚀的模型为滑坡位移提供了更好的解释。此外，倾斜数据表明，侵蚀发生在滑坡位移之前至少1个月。这意味着海岸侵蚀在海岸滑坡的准备和持续位移中发挥了作用。内陆滑坡的脚趾会因河流切割或人工施工而遭到挖蚀，其地貌设置与所研究的滑坡相似。此处获得的知识可有助于理解不稳定机制和与此类滑坡有关的地形变化。分级为4 +©2020 John Wiley＆Sons，Ltd.
更新日期：2020-06-29
中文翻译：
多传感器观测揭示海岸侵蚀对滑坡活动的影响
海岸侵蚀正成为气候变化日益严重的后果。这项研究证明了海岸侵蚀对滑坡活动的影响，同时考虑了侵蚀量和孔隙水压力的变化。为了确定与滑坡产生有关的因素，我们专门测量了日本东北部北海道沿海滑坡的位移，变形，孔隙水压力和侵蚀量，具有较高的时间分辨率（1 s–1 h）。 7个月。已经确定，在高孔隙水压力的同时发生滑坡。脚趾侵蚀事件也发生过几次，而滑坡表现出较大的位移。因为脚趾侵蚀和孔隙水压力增加同时发生，我们试图通过进行包含两个因素影响的稳定性分析来确定两者中的哪一个对滑坡位移起主要作用。从实际观察到的数据来看，脚趾侵蚀和孔隙水压力的增加对研究滑坡的失稳具有可比的影响。具体而言，安全系数的时间序列显示，脚趾侵蚀情况下的滑坡比无侵蚀情况下的滑坡更不稳定，安全系数相差超过5％。具有脚趾侵蚀的模型为滑坡位移提供了更好的解释。此外，倾斜数据表明，侵蚀发生在滑坡位移之前至少1个月。这意味着海岸侵蚀在海岸滑坡的准备和持续位移中发挥了作用。内陆滑坡的脚趾会因河流切割或人工施工而遭到挖蚀，其地貌设置与所研究的滑坡相似。此处获得的知识可有助于理解不稳定机制和与此类滑坡有关的地形变化。分级为4 +©2020 John Wiley＆Sons，Ltd.
京公网安备 11010802027423号