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Two-dimensional numerical model for debris flows in the Jiangjia Gully, Yunnan Province
Peng Hong2; Zhao Yanxin1; Cui Peng3; Zhang Wanshun1; Chen Xuejiao1; Chen Xiaoqing3
Corresponding AuthorZhang, WS
AbstractDebris flows are recurrent natural hazards in many mountainous regions. This paper presents a numerical study on the propagation of debris flows in natural erodible open channels, in which the bed erosion and sedimentation processes are important. Based on the Bingham fluid theory, a mathematical model of the two-dimensional non-constant debris flow is developed. The governing equations include the continuity and momentum conservation equations of debris flow, the sediment convection-diffusion equation, the bed erosion-deposition equation and the bed-sediment size gradation adjustment equation. The yield stress and shear stress components are included to describe the dynamic rheological properties. The upwind control-volume Finite Volume Method (FVM) is applied to discretize the convection terms. The improved SIMPLE algorithm with velocity-free-surface coupled correction is developed to solve the equations on non-orthogonal, quadrilateral grids. The model is applied to simulate a debris flow event in Jiangjia Gully, Yunnan Province and to predict the flow pattern and bed erosion-deposition processes. The results show the effectiveness of the proposed numercial model in debris flow simulation and potential hazard analysis.
KeywordDebris Flow Numerical Simulation Simple Algorithm Finite Volume Method Hazard Analysis Jiangjia Gully
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000297365300001
Funding OrganizationNational Basic Research Program of China (973 Program)(2011CB409902) ; Chinese Academy of Sciences(KZCX2-YW-302)
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China
2.Wuhan Univ, Coll Water Resources & Hydropower Engn, Wuhan 430072, Peoples R China
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Peng Hong,Zhao Yanxin,Cui Peng,et al. Two-dimensional numerical model for debris flows in the Jiangjia Gully, Yunnan Province[J]. JOURNAL OF MOUNTAIN SCIENCE,2011,8(6):757-766.
APA Peng Hong,Zhao Yanxin,Cui Peng,Zhang Wanshun,Chen Xuejiao,&Chen Xiaoqing.(2011).Two-dimensional numerical model for debris flows in the Jiangjia Gully, Yunnan Province.JOURNAL OF MOUNTAIN SCIENCE,8(6),757-766.
MLA Peng Hong,et al."Two-dimensional numerical model for debris flows in the Jiangjia Gully, Yunnan Province".JOURNAL OF MOUNTAIN SCIENCE 8.6(2011):757-766.
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