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http://dx.doi.org/10.14481/jkges.2014.15.12.109

The Study of Sediment Volume Concentration in Liquefied-Layer of Debris Flow  

Kim, Sungduk (Department of Civil Engineering, Chung-Ang University)
Publication Information
Journal of the Korean GEO-environmental Society / v.15, no.12, 2014 , pp. 109-115 More about this Journal
Abstract
The purpose of this study is to estimate the sediment volume concentration of the liquified-solid mixture which is included fine sediment fractions, according to the variance of the channel slope and the water supply. The numerical model was performed by using the Finite Differential Element Method (FDM) based on the equation for the mass conservation, momentum conservation and the equation of coarse sediment an fine sediment. In comparison of varying the channel slope, the deeper the channel slope, the inflection point of the sediment concentration was occurred rapidly. In comparison of variance of the water supply, as the water supply increases fluctuation with high sediment concentration. In this situation, debris flow changes to the turbulent flow and the sediment becomes to be floated. In comparison varying the length paved saturated sediment, the longer the length, the high concentration of sediment occurred, for the safety of the slope it is needed to check the possibility of the erosion in the slope by debris flow. The results of this study will provide useful information in predicting of the disaster by the liquified-solid mixture and in prevention of the debris flow with various the slope in the mountain side.
Keywords
Fine sediment fraction; Corase sediment fraction; Liquified-solid mixture; Sediment volume concentration; Finite difference method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Armanini, A., Fraccarollo, L. and Rosatti, G. (2009), Twodimensional simulation of debris flows in erodible channels. Computers & Geosciences, Vol. 35, pp. 993-1006.   DOI
2 Calligaris, C., Boniello, M. A. and Zini, L. (2008), Debris flow modeling in Julian Alps using FLO-2D, Monitoring, Simulation, Prevention and Remediation of Dense Debris Flows II, WIT, pp. 76-83.
3 Chen, H., Dadson, S. and Chi, Y. G. (2006), Recent rainfallinduced landslides and debris flow in northern Taiwan, Geomorphology, Vol. 77, pp. 112-125.   DOI
4 Crosta, G. B. (2001), Failure and flow development of a complex slide: the 1993 Sesa, landslide, Engineering Geology, Vol. 53, pp. 173-199.
5 Kim, S. D., Yoon, I. R., Oh, S. W., Lee, H. J. and Bae, W. S. (2012), Numerical simulation for behavior of debris flow according to the variances of slope angle, Journal of the Korean Geoenvironmental Society, Vol. 13, No. 6, pp. 59-66 (in Korean).
6 Egashira, S., Miyamoto, K. and Itoh, T. (1997), Constitutive equation of debris flow and their applicability, 1st International ConferenceonDebris-Flow Hazards Mitigation, ASCE, pp. 340-349.
7 Jun, B. H., Jun, K. W. and Lee, S. C. (2014), Analysis of the erosion/deposition in debris flow using terrestrial Lidar data, Koren Review of Crisis & Emergency Management, Vol. 10, No. 3, pp. 61-71 (in Korean).
8 Kim, S. D., Oh, S. W. and Lee, H. J. (2013), The study of relationship between berm width and debris flow at the slope, Journal of the Korean Geoenvironmental Society, Vol. 14, No. 11, pp. 5-12 (in Korean).   DOI
9 Martinez, C., Miralles-Wilhelm, F. and Garcia-Martinez, R. (2008), Verification of a 2D finite element debris flow model using Bingham and cross rheological formulations, Monitoring, Simulation, Prevention and Remediation of Dense Debris Flows II, WIT, pp. 56-64.
10 McDougall, T., Donley, H. F. and Howard, T. R. (2003), On debris flow/avalanche California, in debris flows/avalanches: Process, Recognition and Mitigation, Reviews in Engineering Geology, Geol. Soc. AM. VII, pp. 223-236.
11 Nakatani, K., Wada, T., Satofuka, Y. and Mizuyama, T. (2008), Development of "Kanko 2D (Ver. 2.00)", a user-friendly one-and two- dimensional debris flow simulator equipped with a graphical user interface, International Journal of Erosion Control Engineering, Vol. 1, No. 2, pp. 62-72.   DOI
12 O'Brien, J. S., Julien, P. Y. and Fullerton, W. T. (1993), Twodimensional water flood and mudflow simulation, Journal of Hydraulic Engineering, Vol. 119, No. 2, pp. 244-266.   DOI
13 Paik, J. C. and Park, S. D. (2009), Numerical modeling and field measurement of 1D debris flows, Poceeding of the Korean Society of Civil Engineers, pp. 695-698 (in Korean).
14 Swantson, D. N. and Swantson, F. J. (1974), Timber harvesting, mass erosion, and steepland forest geomorphology in the Pacific Northwest. In: Geomorphology and Engineering. Edited by D.R. Coates. Dowden, Hutchinson, and Ross. Inc., Stroudsburg, pp. 199-221.
15 Takahashi, T., Nakagawa, H., Harada, T. and Yamashiki, Y. (1992), Routing debris flows with particle segregation, Journal of Hydraulic Engineering, Vol. 118, No. 11, pp. 1490-1507.   DOI
16 Wang, N. S., Yi, R. H. and Liu, D. (2008), A solution method to the problem proposed by Wang in voting systems, Journal of Computational and Applied Mathematics, Vol. 221, pp. 106-113.   DOI
17 Takahashi, T. and Tsujimoto, H. (1984), Mechanics of granular flow in inclined chute. Journal of Hydraul. Coast. Environment Engineering, JSCE, Vol. 565, No.2-39, pp. 57-71 (in Japanese).