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A Case Study for Simulation of a Debris Flow with DEBRIS-2D at Inje, Korea  

Chae, Byung-Gon (Geologic Environment Research Division, Korea Institute of Geoscience and Mineral Resources)
Liu, Ko-Fei (Dept. of Civil Engineering, National Taiwan University, Taiwan R.O.C.)
Kim, Man-Il (Office of Environmental Geology, Korea Rural Community and Agriculture Corporation)
Publication Information
The Journal of Engineering Geology / v.20, no.3, 2010 , pp. 231-242 More about this Journal
Abstract
In order to assess applicability of debris flow simulation on natural terrain in Korea, this study introduced the DEBRIS-2D program which had been developed by Liu and Huang (2006). For simulation of large debris flows composed of fine and coarse materials, DEBRIS-2D was developed using the constitutive relation proposed by Julien and Lan (1991). Based on the theory of DEBRIS-2D, this study selected a valley where a large debris flow was occurred on July 16th, 2006 at Deoksanri, Inje county, Korea. The simulation results show that all mass were already flowed into the stream at 10 minutes after starting. In 10minutes, the debris flow reached the first geological turn and an open area, resulting in slow velocity and changing its flow direction. After that, debris flow started accelerating again and it reached the village after 40 minutes. The maximum velocity is rather low between 1 m/sec and 2 m/sec. This is the reason why debris flow took 50 minutes to reach the village. The depth change of debris flow shows enormous effect of the valley shape. The simulated result is very similar to what happened in the field. It means that DEBRIS-2D program can be applied to the geologic and topographic conditions in Korea without large modification of analysis algorithm. However, it is necessary to determine optimal reference values of Korean geologic and topographic properties for more reliable simulation of debris flows.
Keywords
Debris flow simulation; DEBRIS-2D; Maximum velocity; Depth change; Korean geologic and topographic properties;
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  • Reference
1 Liu, K.F. and Huang, M.C., 2009, Numerical Simulation of Debris Flows, Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2009), May 31 - June 5, 2009, Honolulu, Hawaii, USA, OMAE2009-79197.
2 Liu, K.F. and Huang, M.T., 1996, Study of the front shape of 3-D stationary debris flow, Proceedings of Eight Civil and Hydraulic conference, 529-536.
3 Liu, K.F. and Huang, M.T., 2003, Three-dimensional numerical simulation of debris flows and its applications, The 3rd international conference on debrisflow hazards mitigation, 469-481.
4 Liu. K.F. and Mei, C.C., 1989, Slow spreading of a sheet of Bingham flulid on an inclined plane, Journal of Fluid Mechanics, 209, 505-529.
5 Mei, C.C. and Yuhi, M., 2001, Slow flow of a Bingham fluid in a shallow channel of finite width, Journal of Fluid Mechanics, 431, 135-159.   DOI
6 Ng, C. and Mei, C.C., 1994, Roll waves on a shallow layer of mud modeled as a power-law fluid, Journal of Fluid Mechanics, 263, 151-183.   DOI
7 O'Brien, J.S. and Julien, P.Y., 1997, On the importance of mudflow routing, Proceedings of the 2nd International Conference on Debris Flow Hazards Mitigation, Taipei, 677-686.
8 Tasi, Y.F., 1999, Study on the configuration of debris flow fan, Ph.D. dissertation, National Cheng-Kung University, Taiwan, 255p.
9 Coussot, P. and Proust, S., 1996, Slow, unconfined spreading of a mud flow, Journal of Geophysical Research, 101, 25217-25229.   DOI
10 Huang X., and Garcia, M.H., 1998, A Herschal-Hulkley model for mud flow down a slope., Journal of Fluid Mechanics, 374, 305-333.   DOI
11 Iverson, R.M., Denlinger, R.P., LaHusen, R.G., and Logan, M., 2000, Two-phase debris flow across 3-D terrain: Model predictions and experimental tests, in Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment G.F. Wieczorek and N.D. Naeser, eds., Balkema, Rotterdam, 521-529.
12 Johnson, A.M., 1970, Physical processes in geology. New York, 577p.
13 Julien, P.Y. and Lan, Y., 1991, Rheology of hyperconcentrations, Journal of Hydr. Engrg., ASCE, 117, 346-353.   DOI
14 KIGAM, 2008, Development of landslide prediction technology and damage mitigation countermeasures, NEMA, NEMA-06-NH-04, 566p.
15 Liu, K.F. and Huang, M.C., 2006, Numerical simulation of debris flow with application on hazard area mapping, Computational Geosciences, 10, 221-240.   DOI   ScienceOn