GIS based assessment of rainfall-induced landslide susceptibility of sensitive marine clays: a case study

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-10-07 DOI:10.1080/17486025.2021.1955152

Mohammad H. Al-Umar, M. Fall, B. Daneshfar

{"title":"GIS based assessment of rainfall-induced landslide susceptibility of sensitive marine clays: a case study","authors":"Mohammad H. Al-Umar, M. Fall, B. Daneshfar","doi":"10.1080/17486025.2021.1955152","DOIUrl":null,"url":null,"abstract":"ABSTRACT Landslides are frequent occurrences in Ottawa, Canada because sensitive marine clays (also known as Leda clay or Champlain Sea clay) dominate the landscape. These landslides are often triggered by rainfall in the region. A geographic information system (GIS) based modelling approach has been developed to assess and predict rainfall-induced landslides in the sensitive clays of the Ottawa region. The Transient Rainfall Infiltration and Grid-based Slope-stability (TRIGRS) model has been used in a GIS framework to investigate the influence of rainfall On shallow landslides over the Ottawa region, with respect to time and location. The assessment result maps show that the steep slopes of sensitive clays are more prone to landslides. Furthermore, susceptibility to landslides in these areas increases with long periods of intense rainfall. The proposed GIS based model is validated by comparing the predicted areas of landslides induced by rainfall with previous shallow landslides that had occurred in the Ottawa region. The results show that there is a good agreement between the predicted areas of landslides and the previous landslides reported. The proposed GIS–TRIGRS combined modelling approach can be therefore considered as a potential tool for assessing and predicting rainfall induced landslides in sensitive marine clays in Ottawa.","PeriodicalId":46470,"journal":{"name":"Geomechanics and Geoengineering-An International Journal","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2021-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geomechanics and Geoengineering-An International Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/17486025.2021.1955152","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}

引用次数: 2

Abstract

ABSTRACT Landslides are frequent occurrences in Ottawa, Canada because sensitive marine clays (also known as Leda clay or Champlain Sea clay) dominate the landscape. These landslides are often triggered by rainfall in the region. A geographic information system (GIS) based modelling approach has been developed to assess and predict rainfall-induced landslides in the sensitive clays of the Ottawa region. The Transient Rainfall Infiltration and Grid-based Slope-stability (TRIGRS) model has been used in a GIS framework to investigate the influence of rainfall On shallow landslides over the Ottawa region, with respect to time and location. The assessment result maps show that the steep slopes of sensitive clays are more prone to landslides. Furthermore, susceptibility to landslides in these areas increases with long periods of intense rainfall. The proposed GIS based model is validated by comparing the predicted areas of landslides induced by rainfall with previous shallow landslides that had occurred in the Ottawa region. The results show that there is a good agreement between the predicted areas of landslides and the previous landslides reported. The proposed GIS–TRIGRS combined modelling approach can be therefore considered as a potential tool for assessing and predicting rainfall induced landslides in sensitive marine clays in Ottawa.

查看原文本刊更多论文

基于GIS的敏感性海相粘土降雨诱发滑坡易感性评价:一个案例研究

摘要加拿大渥太华经常发生山体滑坡，因为敏感的海洋粘土（也称为莱达粘土或尚普兰海粘土）占主导地位。这些滑坡通常是由该地区的降雨引发的。开发了一种基于地理信息系统的建模方法，用于评估和预测渥太华地区敏感粘土中降雨引发的滑坡。瞬态降雨入渗和基于网格的边坡稳定性（TRIGRS）模型已在GIS框架中用于研究降雨对渥太华地区浅层滑坡在时间和位置方面的影响。评估结果图显示，敏感粘土的陡坡更容易发生滑坡。此外，随着长时间的强降雨，这些地区容易发生山体滑坡。通过将降雨引发的滑坡预测区域与渥太华地区以前发生的浅层滑坡进行比较，验证了所提出的基于GIS的模型。结果表明，预测的滑坡面积与以往报道的滑坡面积有很好的一致性。因此，所提出的GIS–TRIGRS组合建模方法可被视为评估和预测渥太华敏感海洋粘土中降雨引发的滑坡的潜在工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geomechanics and Geoengineering-An International Journal ENGINEERING, GEOLOGICAL-

CiteScore

3.80

自引率

0.00%

发文量

期刊介绍： Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.