黄远东, 许冲. 2019: 2018年兴文MS5.7地震触发滑坡分布规律分析. 工程地质学报, 27(s1): 185-192. DOI: 10.13544/j.cnki.jeg.2019061
    引用本文: 黄远东, 许冲. 2019: 2018年兴文MS5.7地震触发滑坡分布规律分析. 工程地质学报, 27(s1): 185-192. DOI: 10.13544/j.cnki.jeg.2019061
    HUANG Yuandong, XU Chong. 2019: ANALYSIS OF THE DISTRIBUTION LAW OF LANDSLIDES TRIGGERED BY THE XINGWEN MS5.7 EARTHQUAKE IN 2018. JOURNAL OF ENGINEERING GEOLOGY, 27(s1): 185-192. DOI: 10.13544/j.cnki.jeg.2019061
    Citation: HUANG Yuandong, XU Chong. 2019: ANALYSIS OF THE DISTRIBUTION LAW OF LANDSLIDES TRIGGERED BY THE XINGWEN MS5.7 EARTHQUAKE IN 2018. JOURNAL OF ENGINEERING GEOLOGY, 27(s1): 185-192. DOI: 10.13544/j.cnki.jeg.2019061

    2018年兴文MS5.7地震触发滑坡分布规律分析

    ANALYSIS OF THE DISTRIBUTION LAW OF LANDSLIDES TRIGGERED BY THE XINGWEN MS5.7 EARTHQUAKE IN 2018

    • 摘要: 2018年12月16日12时46分四川省宜宾兴文县MS5.7级地震诱发了多处滑坡。通过震前震后遥感图像,在GIS平台下,本研究在地震Ⅵ~Ⅶ烈度区通过目视解译方法制作了本次地震触发滑坡的分布图,并分析了这些滑坡与相关环境因子(高程、坡度、坡向、曲率等)的关系。结果表明本次地震触发288处滑坡,总面积达到0.49 km2,平均面积为1701 m2。这些滑坡中大部分规模较小,最大滑坡面积达到51 745 m2,最小滑坡面积为111 m2。这些滑坡多发育于700~1000 m高程范围、坡度为5°~15°范围、坡向240°和180°方向、距离震中0~10 km区间、岩性为砾岩、灰岩和页岩的岩层的区域内。本研究对进一步研究地震滑坡的空间分布,机理,危险性评价及预测等工作提供了基础。

       

      Abstract: On December 16, 2018, at 12:46 am, a magnitude MS5.7 earthquake occurred in Xingwen County, Sichuan Province. The quake triggered a lot of landslides. Based on remote sensing images before and after the earthquake and the GIS platform, this study produced a distribution map of the earthquake-triggered landslide in the Ⅵ-Ⅶ intensity area by visual interpretation method, and analyzed the relationship between these landslides and several environmental factors such as elevation, slope, slope aspect, and slope curvature. The results show that at least 288 landslides were triggered by the earthquake, with a total area of 0.49 km2 and an average area of 1701 m2. Most of these landslides were small scale, while the largest reaching 51, 745 m2 and the smallest 111 m2. Most of the landslide developed in the areas of 700~1000 m in elevation, 5°~15°of slope angle, slope aspect between 180ånd 240°, 10 km range from the epicenter, and underlying of conglomerate, limestone and shale rock. This study provides a basis for further study on the spatial distribution, mechanism, risk assessment and prediction of seismic landslides.

       

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