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Debris flow enlargement from entrainment: A case study for comparison of three entrainment models
Shen, Ping1; Zhang, Limin1; Wong, Ho Fai2; Peng, Dalei2; Zhou, Shengyang1; Zhang, Shuai3; Chen, Chen4
2020-06-05
Source PublicationEngineering Geology
ISSN0013-7952
Volume270
Abstract

Material entrainment can significantly magnify debris flow volume and increase its destructive power. Despite great research efforts, entrainment is still not well understood. To meet the needs for debris flow simulation and hazard analysis, it is of practical significance to understand and evaluate existing entrainment models. In this study, we evaluate three entrainment models on an integrated single-phase continuum debris flow simulation platform. The well-documented Tsing Shan debris flow in 1990 in Hong Kong, with an initial landslide volume of 2500 m and a final deposit volume of 20,400 m, is used as a benchmark to compare the three models. The characteristics and performance of each model and its model parameters are discussed. Although numerical results achieve reasonable agreement with detailed field investigations, some parameters are still determined empirically and subjectively. Despite of the imperfection, these models can be used for debris flow hazard analysis in the Hong Kong region with similar conditions. More physically-based entrainment models considering two-phase flow need to be adopted and further developed in the future.

KeywordDebris Flow Entrainment Landslide Landslide Risk Numerical Simulation
DOI10.1016/j.enggeo.2020.105581
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Geology
WOS IDWOS:000530092700006
Scopus ID2-s2.0-85081888618
Fulltext Access
FWCI1.3453432
Citation statistics
Document TypeJournal article
CollectionPersonal research not belonging to the institution
Corresponding AuthorZhang, Limin
Affiliation1.Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
2.Technological and Higher Education Institute of Hong Kong, Tsing Yi Island, Hong Kong
3.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, Zheda Road #38, 310027, China
4.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, No. 24 South Section 1, Yihuan Road, 610065, China
Recommended Citation
GB/T 7714
Shen, Ping,Zhang, Limin,Wong, Ho Fai,et al. Debris flow enlargement from entrainment: A case study for comparison of three entrainment models[J]. Engineering Geology,2020,270.
APA Shen, Ping,Zhang, Limin,Wong, Ho Fai,Peng, Dalei,Zhou, Shengyang,Zhang, Shuai,&Chen, Chen.(2020).Debris flow enlargement from entrainment: A case study for comparison of three entrainment models.Engineering Geology,270.
MLA Shen, Ping,et al."Debris flow enlargement from entrainment: A case study for comparison of three entrainment models".Engineering Geology 270(2020).
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