期刊
JOURNAL OF HYDRAULIC ENGINEERING
卷 146, 期 8, 页码 -出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)HY.1943-7900.0001761
关键词
Debris flow; Flow resistance; Grain size distribution; Flow velocity
资金
- Key International S&T Cooperation Projects [2016YFE0122400]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23090202]
- Natural Science Foundation of China [41772343]
- Open Fund of State Key Laboratory of Geohazards Prevention and Geoenvironment Protection [SKLGP2017K013]
- Chinese Academy of Sciences and Organization Department of Sichuan Provincial Party Committee Light of West ChinaProgram (the key control techniques of glacial debris flow along the Sichuan-Tibet Railway)
Velocity is one of the most important parameters of debris flows, and it is usually calculated using Manning formula in hydraulics, mostly ignoring the granular effects due to flow materials. This study proposes a method in term of grain composition of debris flow, incorporating the physical effects of grain on roughness. It is found that the Manning resistance coefficient can be well related to the grain size distribution (GSD) and thus the method is expected to have a wide application. A new formula incorporating the influence of granular effects is built based on observation data of debris flows in Jiangjia Gully (JJG), China, and then it is tested by data from debris flows in other regions.
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