Abstract
Debris flows moving along steep creeks can bring serious damage to downstream regions. Most debris-flow experiments to date have been conducted in controlled, indoor settings using flumes with straight channels and constant cross-sectional areas. Such experiments cannot accurately verify the dynamic behavior of real debris flows because of their relatively small size, and they often fail to account for complex topographic shapes or the channel bed erosion that occurs during debris flows. With this in mind, a real-scale experiment was conducted in a natural outdoor gully that could credibly represent a true hazard site in South Korea. Video cameras, a load cell, pore pressure transducers, and an ultrasonic sensor were installed at the test site to capture the dynamic behavior of the debris flow. Topographic changes were analyzed before and after the experiment using terrestrial LiDAR. The results showed that the pore-fluid pressure and normal stress for the soil bed were closely related to the flow depth. In addition, the change of the frontal velocity of the debris flow decreased with the decreasing slope angle along the channel but the effect of the width of the channel on the velocity was negligible, although the velocity temporarily increased in the exposed bedrock zone despite a decrease in the slope angle. Furthermore, the erosion depth increased as the frontal velocity increased, with up to four times more erosion in the initiation zone than in the transportation zone.
References
Arattano M, Franzi L (2003) On the evaluation of debris flows dynamics by means of mathematical models. Nat Hazards Earth Syst Sci 3(6):539–544. https://doi.org/10.5194/nhess-3-539-2003
Armanini A (1997) On the dynamic impact of debris flows. Recent developments on debris flows lecture notes in earth sciences, vol 64. Springer Verlag, Berlin, pp 208–226
Armanini A, Dalrì C, Putta FD, Larcher M, Rampanelli L, Righetti M (2004) Experimental analysis on the hydraulic efficiency of mudflow breakers. In: Yazdandoost F, Attari J (Eds.), In: Proceedings of the International Conference on Hydraulics of Dams and River Structures, Taylor & Francis Group: London, pp 385–392
Armanini A, Larcher M, Odorizzi M (2011) Dynamic impact of a debris flow front against a vertical wall. In: Genevois R, Hamilton DL, Prestininzi A (Eds.), In: Proceedings of the 5th International Conference on Debris-flow Hazards Mitigation: Mechanics, Prediction and Assessment, Casa Editrice Università La Sapienza, Rome, Italy, pp 1041–1049
Berger C, McArdell WB, Schlunegger F (2011) Direct measurement of channel erosion by debris flow, Illgraben. Switzerland J Geophys Res Earth Surf 116:F01002. https://doi.org/10.1029/2010JF001722
Bonnet-Staub I (1998) Mécanismes d’initiation des laves torrentielles dans les Alpes françaises, contribution à la maîtrise du risque. PhD Thesis, Ecole des Mines de Paris, France (In French)
Bugnion L, McArdell BW, Bartelt P, Wendeler C (2012) Measurements of hillslope debris flow impact pressure on obstacles. Landslides 9(2):179–187. https://doi.org/10.1007/s10346-011-0294-4
Cavalli M, Marchi L (2008) Characterisation of the surface morphology of an alpine alluvial fan using airborne LiDAR. Nat Hazards Earth Syst Sci 8(2):323–333. https://doi.org/10.5194/nhess-8-323-2008
Choi YJ (2010) A study on downstream process of debris flow mobilized from landslides. Master’s thesis, Kangwon National University, Korea (In Korean)
Choi CE, Ng CWW, Au-Yeung SCH, Goodwin GR (2015) Froude characteristics of both dense granular and water flows in flume modeling. Landslides 12(6):1197–1206. https://doi.org/10.1007/s10346-015-0628-8
Cui Y, Choi CE, Liu H, Ng CWW (2018) Effects of particle size of monodispersed granular flows impacting a rigid barrier. Nat Hazards 91(3):1179–1201. https://doi.org/10.1007/s11069-018-3185-3
Fan JC, Liu CH, Yang CH, Lin PS, Huang HY (2007) A laboratory study on ion concentration, electrical conductivity of seepage water and mass movement occurrence. In: Chenglung C Major J (Eds.), In: Proceedings of the 3rd International Conference of Debris-Flow Hazards Mitigation: Mechanics, Prediction and Assessment, Millpress, Rotterdam, Netherlands, pp 581–591
Haas TDe, Brat L, Leuven JRFW, Lokhorst IR, (2015) Effect of debris flow composition on runout, depositional mechanisms and deposit morphology in laboratory experiments. J Geophys Res Earth Surf 120(9):1949–1972. https://doi.org/10.1002/2015JF003525
Huang HP, Yang KC, Lai SW (2007) Impact force of debris flow on filter dam. Geophys Res Abstr Eur Geosci Un 9:03218
Iverson RM (1997) The physics of debris flows. Rev Geophys 35(3):245–296. https://doi.org/10.1029/97RG00426
Iverson RM, Denlinger RP (2001) Flow of variably fluidized granular masses across three-dimensional terrain: 1. Coulomb mixture theory. J Geophys Res Solid Earth 106(B1):537–552. https://doi.org/10.1029/2000JB900329
Iverson RM, Reid ME, Logan M, LaHusen RG, Godt JW, Griswold JP (2011) Positive feedback and momentum growth during debris-flow entrainment of wet bed sediment. Nat Geosci 4:116–121. https://doi.org/10.1038/ngeo1040
Johnson CG, Kokelaar BP, Iverson RM, Logan M, LaHusen RG, Gray JMNT (2012) Grain-size segregation and levee formation in geophysical mass flows. J Geophys Res Earth Surf 117(F1):F01032. https://doi.org/10.1029/2011JF002185
Malet JP, Remitre A, Maquaire O, Ancey C, Locat J (2003) Flow susceptibility of heterogeneous marly formations: implications for torrent hazard control in the Barcelonnette Basin (Alpes-de-Haute-Provence, France). In: Rickenmann D, Chen CL (Eds.), In: Proceedings of the 3rd International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction and Assessment, Millpress, Rotterdam, Netherlands, pp 351–362
McCoy SW, Tucker GE, Kean JW, Coe JA (2013) Field measurement of basal force generated by erosive debris flows. J Geophys Res Earth Surf 118:589–602. https://doi.org/10.1002/jgrf.20041
McGuire LA, Rengers FK, Kean JW, Staley DM (2017) Debris flow initiation by runoff in a recently burned basin: is grain-by-grain sediment bulking or en-masse failure to blame? Geophys Res Lett 44(14):7310–7319. https://doi.org/10.1002/2017GL074243
Nakagawa H, Takahashi T, Satofuka Y, Kawaike K (2003) Numerical simulation of sediment disasters caused by heavy rainfall in Camuri Grande basin, Venezuela 1999. In: Rickenmann D, Chen CL (Eds.), In: Proceedings of the 3rd International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction and Assessment, Millpress, Rotterdam, Netherlands, pp 671–682
Nagl G, Hübl J, Kaitna R (2020) Velocity profiles and basal stresses in natural debris flows. Earth Surf Process Landf 45:1764–1776. https://doi.org/10.1002/esp.4844
Reid ME, Iverson RM, Logan M, LaHusen RG, Godt JW, Griswold JP (2011) Entrainment of bed sediment by debris flows: results from large-scale experiments. In: Genevois R, Hamilton D, Prestininzi A (Eds.), In: Proceedings of the 5th International Conference of Debris-Flow Hazards Mitigation: Mechanics, Prediction and Assessment, La Sapienza, Rome, Italy, pp 367–374
Remaître A, Malet JP, Maquaire O, Ancey C (2003) Study of a debris-flow event by coupling a geomorphological and a rheological investigation, example of the Faucon stream (Alpes-de-Haute-Provence, France). In: Rickenmann D, Chen CL (Eds.), In: Proceedings of the 3rd International Conference of Debris-Flow Hazards Mitigation: Mechanics, Prediction and Assessment, Millpress, Rotterdam, Netherlands, pp 375–385
Savage SB, Hutter K (1989) The motion of a finite mass of granular material down a rough incline. J Fluid Mech 199(2):177–215. https://doi.org/10.1017/S0022112089000340
Stepanov BS, Yafyazova RK (2014) Debris flows of the Southeastern Kazakhstan: debris-flow processes and countermeasures against debris-flow hazards (vol. 3, pp 151 151–165). ISBN: 978-601-7150-72-3 (in Russian)
Stock JD, Dietrich WE (2006) Erosion of steepland valleys by debris flows. Geo Soc Am Bull 118:1125–1148. https://doi.org/10.1130/B25902.1
Sze EHY, Lam HWK (2017) Some suggested detailing of flexible net barriers traversing a stream course for drainage purposes, GEO Technical Note TN 3/2017, Geotechnical Engineering Office, Hong Kong, SAR, China
Takahashi, (1991) Debris flow (IAHR Monograph Series). Balkema, Rotterdam
Takahashi, (2007) Debris flow: mechanics, prediction and countermeasures. CRC Press/Balkema, Leiden
Tecca P, Genevois R, Deganutti A, Armento MC (2007) Numerical modelling of two debris-flows in the Dolomites (Northeastern Italian Alps). In: Chen CL, Major JJ (Eds.), In: Proceedings of the 3rd International Conference on Debris-flow Hazards Mitigation: Mechanics, Prediction and Assessment, Millpress, Rotterdam, Netherlands, pp 179–188
Won SY, Lee SW, Paik J, Yune CY, Kim GH (2016) Analysis of erosion in debris flow experiment using terrestrial LiDAR. J Kor Soci Sur Geo Photo Cartogra 34(3):309–317. https://doi.org/10.7848/ksgpc.2016.34.3.309
Yafyazova RK (2018) Full-scale experiments on replication of debris flows in Kazakhstan. In: Ho KKS, Leung AYF, Kwan JSH, Koo RCH, Law RPH (Eds.), In: Proceedings of the 2nd JTC1 Workshop: Triggering and Propagation of Rapid Flow-like Landslides, Hong Kong, China, 3–5 December, pp 171–174
Yune CY, Jun KJ, Seo HS (2010) Seepage and slope stability analysis on the occurrence of debris-flow at Jinbu, Korea. In: Proceedings of the 17th Southeast Asian Geotechnical Conference, Taipei, Taiwan, pp 318–321
Yune CY, Kim KS, Yoo NJ, Seo HS, Jun KJ (2011) Analysis of debris flow characteristics through database construction in Korea. Italian J Engin Geo Environ 159–164. https://doi.org/10.4408/IJEGE.2011-03.B-019
Yune CY, Jeong S, Kim MM (2017) Susceptibility assessment of rainfall induced landslides: A case study of the 27th July 2011 debris flow at Umyeonsan (Mt.), Seoul, Korea. In: Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul, Korea, pp 265–278
Zanuttigh B, Lamberti A (2007) Instability and surge development in debris flows. Rev Geophys 45(3). https://doi.org/10.1029/2005RG000175
Zhou GGD, Wright NG, Sun Q (2016) Experimental study on the mobility of channelized granular mass flow. Acta Geol Sin 90(3):988–998. https://doi.org/10.1111/1755-6724.12739
Zhou GGD, Li S, Song D, Choi CE, Chen X (2018) Depositional mechanisms and morphology of debris flow: physical modeling. Landslides 16(2):315–332. https://doi.org/10.1007/s10346-018-1095-9
Funding
This research was supported by grants from the Regional Innovation Technology Development Program funded by the Ministry of Land, Infrastructure and Transport of the Korean government (22RITD-C158631-03), and the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (2021R1A6A1A03044326).
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The video clips of real-scale experiments in this study are available as supplementary material.
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Yune, CY., Kim, BJ., Jun, KJ. et al. Real-scale experiment of debris flow in a natural gulley: key findings and lessons learned. Landslides 20, 2757–2774 (2023). https://doi.org/10.1007/s10346-023-02134-3
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DOI: https://doi.org/10.1007/s10346-023-02134-3