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Water 2017, 9(4), 253; doi:10.3390/w9040253

Study on the Formation and Initial Transport for Non-Homogeneous Debris Flow

1
School of Environment, Key Laboratory of Water and Sediment Sciences of MOE, Beijing Normal University, Beijing 100875, China
2
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
3
International Economic & Technical Cooperation and Exchange Center, Ministry of Water Resources, Beijing 100053, China
4
Institute of Chengdu Mountain Hazard and Environment, Chinese Academy of Sciences, Chengdu 610000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Athanasios Loukas
Received: 29 December 2016 / Revised: 24 March 2017 / Accepted: 31 March 2017 / Published: 10 April 2017
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Abstract

Non-homogeneous debris flows generally occur during the rainy seasons in Southwest China, and have received considerable attention in the literature. Regarding the complexity in debris flow dynamics, experimental approaches have proven to be effective in revealing the formative mechanism for debris flow, and quantifying the relations between the various influencing factors with debris-flow formation and subsequent transport processes. Therefore, a flume-based and experimental study was performed at the Debris Flow Observation and Research Station of Jiangjia Gully in Yunnan Province, to theoretically analyze favorable conditions for debris-flow formation and initial transport by selecting the median particle size d50, flow rate Q, vertical grading coefficient ψ, slopes S, and the initial soil water contents W as the five variables for investigation. To achieve this, an optimal combination of these variables was made through an orthogonal experimental design to determine their relative importance upon the occurrence and initial mobilization behavior of a debris flow and to further enhance our insight into debris-flow triggering and transport mechanisms. View Full-Text
Keywords: non-homogeneous debris flows; formation; initial transport; orthogonal experimental design non-homogeneous debris flows; formation; initial transport; orthogonal experimental design
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Shu, A.P.; Wang, L.; Zhang, X.; Ou, G.Q.; Wang, S. Study on the Formation and Initial Transport for Non-Homogeneous Debris Flow. Water 2017, 9, 253.

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