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GIS-based modeling of snowmelt-induced landslide susceptibility of sensitive marine clays
Geoenvironmental Disasters Pub Date : 2020-02-10 , DOI: 10.1186/s40677-020-0142-8
Mohammad Al-Umar , Mamadou Fall , Bahram Daneshfar

In this study, a simulation tool, based on the combination of Geographic Information System (GIS) and Grid-Based Regional Slope-Stability Model (TRIGRS), is developed to assess and predict the snowmelt-induced landslides in areas of sensitive marine clays in the Ottawa region (Canada). Topographic, geologic, hydrologic, and geotechnical information of the study area, in addition to snowmelt intensity data for different periods, was required to conduct this modeling study. Snowmelt intensity records for periods of 6–48 h, 3–15 days, 25 days, and 30 days, as well as the information on historical landslides in the study area, were used to examine both the timing and location of shallow landslides due to snowmelt across the Ottawa region. The developed tool is validated by comparing the predicted landslide-susceptible areas with the historical landslide maps in the study area. A good agreement between the predicted and recorded historical landslides was obtained, which suggests that the developed GIS-TRIGRS based tool can predict relatively well the snowmelt-induced landslide susceptibility in the sensitive marine clays. The modeling results show that high slope areas of sensitive marine clays are more prone to snowmelt-induced landslides. As a result, this simulation tool could be used to assess and/or predict snowmelt-induced landslides in different areas of the Ottawa region, which is an important means for decision-making processes with respect to protecting the population and infrastructure against snow-melt induced marine clay landslides.

中文翻译:

基于GIS的敏感海洋黏土融雪诱发滑坡敏感性的建模

在这项研究中,开发了一种基于地理信息系统(GIS)和基于网格的区域边坡稳定性模型(TRIGRS)相结合的模拟工具,以评估和预测在敏感海积土地区雪融引起的滑坡。渥太华地区(加拿大)。除了进行不同时期的融雪强度数据外,还需要研究区域的地形,地质,水文和岩土技术信息来进行此建模研究。使用6至48小时,3至15天,25天和30天的融雪强度记录,以及研究区域的历史滑坡信息,来检查由于以下原因造成的浅层滑坡的时间和位置整个渥太华地区融雪。通过将预测的滑坡易感区域与研究区域中的历史滑坡图进行比较,可以验证开发工具的有效性。在预测的和记录的历史滑坡之间获得了良好的一致性,这表明开发的基于GIS-TRIGRS的工具可以较好地预测融雪引起的敏感海洋粘土中滑坡的敏感性。模拟结果表明,敏感海洋粘土的高坡度地区更容易发生融雪诱发的滑坡。结果,该模拟工具可用于评估和/或预测渥太华地区不同地区的融雪诱发的滑坡,这是决策过程中保护人口和基础设施免受融雪影响的重要手段。引起的海洋粘土滑坡。在预测的和记录的历史滑坡之间获得了良好的一致性,这表明开发的基于GIS-TRIGRS的工具可以较好地预测融雪引起的敏感海洋粘土中滑坡的敏感性。模拟结果表明,敏感海洋粘土的高坡度地区更容易发生融雪诱发的滑坡。结果,该模拟工具可用于评估和/或预测渥太华地区不同地区的融雪诱发的滑坡,这是决策过程中保护人口和基础设施免受融雪影响的重要手段。引起的海洋粘土滑坡。在预测的和记录的历史滑坡之间获得了良好的一致性,这表明开发的基于GIS-TRIGRS的工具可以较好地预测融雪引起的敏感海洋粘土中滑坡的敏感性。模拟结果表明,敏感海洋黏土的高坡度地区更容易发生融雪引起的滑坡。结果,该模拟工具可用于评估和/或预测渥太华地区不同地区的融雪诱发的滑坡,这是决策过程中保护人口和基础设施免受融雪影响的重要手段。引起的海洋粘土滑坡。这表明,开发的基于GIS-TRIGRS的工具可以较好地预测融雪引起的敏感海洋粘土中滑坡的敏感性。模拟结果表明,敏感海洋粘土的高坡度地区更容易发生融雪诱发的滑坡。结果,该模拟工具可用于评估和/或预测渥太华地区不同地区的融雪诱发的滑坡,这是决策过程中保护人口和基础设施免受融雪影响的重要手段。引起的海洋粘土滑坡。这表明开发的基于GIS-TRIGRS的工具可以较好地预测融雪引起的敏感海洋粘土中滑坡的敏感性。模拟结果表明,敏感海洋粘土的高坡度地区更容易发生融雪诱发的滑坡。结果,该模拟工具可用于评估和/或预测渥太华地区不同地区的融雪诱发的滑坡,这是决策过程中保护人口和基础设施免受融雪影响的重要手段。引起的海洋粘土滑坡。
更新日期:2020-02-10
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