Advertisement

Explore on Hydro-Mechanical Threshold for Early Warning of Rainfall Induced Shallow Landslides

  • Zong-ji YangEmail author
  • Jian-ping Qiao
  • Taro Uchimura
  • Lin Wang
  • Dong Huang
  • Xiao-qin Lei
  • Li-li Shi
Conference paper

Abstract

After the Wenchuan earthquake on May 12th, co-seismic landslides and fractured slopes were more susceptible to rainfall-induced shallow mass re-mobilization and post-earthquake disasters were gained widespread significance for the disaster mitigation. However, despite the rainfall thresholds, the hydrological parameters of rainfall induced mass re-mobilization in natural environment of Wenchuan earthquake regions is not well understood and widely used for disaster early warning. In this study, shallow rainfall triggered slope failures under partially saturated conditions in the hollows of the gully was proved by instrumental evidence of in situ experimental tests in a natural co-seismic landslide for simulating the rainfall triggered erosion process of shallow failures in debris flow catchment. In addition, the results revealed the transient process and unsaturated condition for mass movement in response to rainfall, and demonstrated the importance of hydrological parameters includes soil matrix suction and moisture content for shallow slope failure in the hollows, and the stability analysis suggested a hydro-mechanical thresholds including water contents and matrix suction based on the mechanism of slope failure for early warning of the mass-remobilization in hollows of debris flows. These findings were expecting for contribution effectively on improvement of early warning accuracy for rainfall induced shallow landslides and debris flows in earthquake hit region.

Keywords

Rainfall induced Unsaturated condition Mass re-mobilization Post-earthquake disaster 

Notes

Acknowledgements

This study is financially supported by National Natural Science Foundation of China (Grant No. 41471012), Science and Technology Service Network Initiative of Chinese Academy of Science (Grant No. KFJ-EW-STS-094), International Cooperation Program of China (2013DFA21720). Grants-in-Aid for Scientific Research of Japan Society for the Promotion of Science (JSPS)

References

  1. Baum RL, Godt JW, Savage WZ (2010) Estimating the timing and location of shallow rainfall-induced landslides using a model for transient, unsaturated infiltration. J Geophys Res 115:F03013. doi: 10.1029/2009JF001321 CrossRefGoogle Scholar
  2. Fredlund DG, Rahardjo H (1993) Soil mechanics for unsaturated soils. Wiley, New YorkCrossRefGoogle Scholar
  3. Godt JW, Sener-Kaya B, Lu N, Baum RL (2012) Stability of infinite slopes under transient partially saturated seepage conditions. Water Resour Res 48:W05505. doi: 10.1029/2011WR011408 CrossRefGoogle Scholar
  4. Hack JT, Goodlett JC (1960) Geomorphology and forest ecology of a mountain region in the Central Appalachians, U.S. Geological Survey Professional Paper 347Google Scholar
  5. Hu W, Xu Q, van Asch TWJ et al (2014) Flume tests to study the initiation of huge debris flows after the Wenchuan earthquake in S-W China. Eng Geol 182:121–129CrossRefGoogle Scholar
  6. Iverson RM (2000) Landslide triggering by rain infiltration. Water Resour Res 36(7):1897–1910CrossRefGoogle Scholar
  7. Lu N, Godt JW (2013) Hillslope hydrology and stability. Cambridge University Press, CambridgeGoogle Scholar
  8. Montgomery DR, Dietrich WE (1994) A physically based model for the topographic control on shallow landsliding. Water Resour Res 30(4):1153–1171Google Scholar
  9. Torres R, Dietrich WE, Montgomery DR et al (1998) Unsaturated zone processes and the hydrologic response of a steep, unchanneled catchment. Water Resour Res 34(8):1865–1879CrossRefGoogle Scholar
  10. Tang C, Zhu J, Li WL, Liang JT (2009) Rainfall-triggered debris flows following the Wenchuan earthquake. Bull Eng Geol Environ 68:187–194CrossRefGoogle Scholar
  11. Xu Q, Zhang S, Li L, van Asch ThWJ (2012) The 13 August 2010 catastrophic debris flows after the 2008 Wenchuan earthquake, China. Nat Hazards Earth Syst Sci 12(1):201–216CrossRefGoogle Scholar
  12. Yang Z, Qiao J, Tian H et al (2012) Real-time Regional Rainfall induced Geohazards Prediction Method in the Wenchuan Earthquake Region, China. Disaster Adv 5(4):408–454Google Scholar
  13. Yin Y, Cheng Y, Liang J, Wang W (2016) Heavy -rainfal l-induced catastrophic rockslide-debris flow at Sanxicun, Dujiangyan, after the WenchuanMs 8.0 earthquake. Landslides 13:9–23CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Zong-ji Yang
    • 1
    Email author
  • Jian-ping Qiao
    • 1
  • Taro Uchimura
    • 2
  • Lin Wang
    • 3
  • Dong Huang
    • 1
  • Xiao-qin Lei
    • 1
  • Li-li Shi
    • 4
  1. 1.Key Laboratory of Mountain Hazards and Surface ProcessInstitute of Mountain Hazards and Environment, Chinese Academy of ScienceChengduChina
  2. 2.Department of Civil & Environmental EngineeringSaitama UniversitySaitamaJapan
  3. 3.Chuo Kaihatsu CorporationTokyoJapan
  4. 4.Chengdu Institute of Geo-Environment MonitoringChengduChina

Personalised recommendations