Debris flow simulation 2D(DFS 2D):Numerical modelling of debris flows and calibration of friction parameters

作     者：Minu Treesa Abraham Neelima Satyam Biswajeet Pradhan Hongling Tian Minu Treesa Abraham;Neeelima Satyam;Biswajeet Pradhan;Hongling Tian

作者机构：Department of Civil EngineeringIndian Institute of Technology IndoreIndoreIndia Centre for Advanced Modelling and Geospatial Information Systems(CAMGIS)School of Civil and Environmental EngineeringFaculty of Engineering and Information TechnologyUniversity of Technology SydneySydneyAustralia Center of Excellence for Climate Change ResearchKing Abdulaziz UniversityJeddahSaudi Arabia Earth Observation CentreInstitute of Climate ChangeUniversity Kebangsaan MalaysiaBangiMalaysia Key Laboratory of Mountain Hazards and Surface ProcessInstitute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2022年第14卷第6期

页      面：1747-1760页

核心收录：

学科分类：08[工学] 0837[工学-安全科学与工程] 

基　　金：financially supported by Department of Space India(Grant No.ISRO/RES/4/663/18-19) 

主　　题：Debris flows Numerical model Rheology Debris flow simulation 2D(DFS 2D) 

摘      要：Debris flows are rapid mass movements with a mixture of rock,soil and ***-intensity rainfall events have triggered multiple debris flows around the globe,making it an important concern from the disaster management *** study presents a numerical model called debris flow simulation 2D(DFS 2D)and applicability of the proposed model is investigated through the values of the model parameters used for the reproduction of an occurred debris flow at Yindongzi gully in China on 13 August *** model can be used to simulate debris flows using three different rheologies and has a userfriendly interface for providing the *** DFS 2D,flow parameters can be estimated with respect to space and *** values of the flow resistance parameters of model,dry-Coulomb and turbulent friction,were calibrated through the back analysis and the values obtained are 0.1 and 1000 m/s^(2),*** new methods of calibration are proposed in this study,considering the crosssectional area of flow and topographical changes induced by the debris *** proposed methods of calibration provide an effective solution to the cumulative errors induced by coarse-resolution digital elevation models(DEMs)in numerical modelling of debris *** statistical indices such as Willmott s index of agreement,mean-absolute-error,and normalized-root-mean-square-error of the calibrated model are 0.5,1.02 and 1.44,*** comparison between simulated and observed values of topographic changes indicates that DFS 2D provides satisfactory results and can be used for dynamic modelling of debris flows.