Preview

GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY

Advanced search

WHY WAS THE AUGUST 2010 ZHOUQU LANDSLIDE SO POWERFUL?

https://doi.org/10.24057/2071-9388-2013-6-1-72-75

Full Text:

Abstract

On August 8, 2010 in the northwestern Chinese province of Gansu, rainstorm-triggered debris flow devastated the small county of Zhouqu. A modeling study, using a new multiple-phase scalable and extensible geo-fluid model, suggests that the cause is the result of an intersection of several events. These were a heavy rainstorm, not necessarily the result of global warming, which triggered the landslide and followed a drought that created surface cracks and crevasses; the geology of the region, notably the loess covering heavily weathered surface rock; and the bedrock damage, which deepened the surface crevasses, inflicted by the 7.9 magnitude Wenchuan earthquake of May 12, 2008. Deforestation and topsoil erosion also contribute. The modeling results underscore the urgency for a high priority program of re-vegetation of Zhouqu county, without which the region will remain exposed to future disastrous, “progressive bulking” type landslides.

About the Authors

Diandong Ren
ASDI, Curtin University of Technology, WA U1987
Australia


Lance Leslie
The University of Oklahoma; 120 David L. Boren Blvd., Suite 5900, Norman, Oklahoma 73072-73071
United States


Mervyn Lynch
Department of Imaging and Applied Physics, Curtin University of Technology
Australia


Qingyun Duan
College of Global Change and Earth System Sciences, Beijing Normal University; 19 Xinjiekouwai, Beijing, China 100875
China


Yongjiu Dai
College of Global Change and Earth System Science, Beijing Normal University; 19 Xinjiekouwai, Beijing 100875 China
China


Wei Shangguan
College of Global Change and Earth System Science, Beijing Normal University; 19 Xinjiekou Road, Haidian, Beijng, China, 100875
China


References

1. Berger, A., & Loutre, M. 2002. An exceptionally long interglacial ahead? Sci., 297, 1287–

2.

3. Bolt, B., Horn, W., Macdonald, G. & Scott, R. 1975. Geological hazards. Springer-Verlag, New

4. York, 1975. 328 pp.

5. Casadei, M., Dietrich, W. & Miller, N. 2003. Testing a model for predicting the timing and

6. location of shallow landslide initiation in soil-mantled landscapes, Earth Surf. Processes

7. Landf., 28, 925–950.

8. Iverson, R. 1997. The physics of debris flows. Review of Geophysics, 35, 245–296.

9. Lawrence, C., R. Rickson, and J. Clark, 1996. The effect of grass roots on the shear strength

10. of colluvial soils in Nepal‘, in Anderson, M. G. and Brooks, S. M. (Eds), Advances in Hillslope

11. Processes, John Wiley, Chichester.

12. Ma, D. & Qi, L. 1997. Study on comprehensive controlling of debris flow hazards in Sanyanyu

13. Gully. Bulletin of Soil and Water Conservation, 26–31.

14. Ren, D., Leslie, L. & Karoly, D. 2008. Mudslide risk analysis using a new constitutive relationship

15. for granular flow. Earth Interactions, 12, 1–16.

16. Ren, D., Wang. J., Fu, R., Karoly. D., Hong, Y., Leslie, L., Fu, C. & Huang, G. 2009. Mudslide

17. caused ecosystem degradation following the Wenchuan earthquake 2008. Geophysical

18. Research Letters, 36, doi:10.1029/2008GL036702.

19. Ren, D., Leslie, L., Fu, R. & Dickinson, R. 2011. Predicting storm-triggered landslides and

20. ecological consequences. Bull. Amer. Meteorol. Soc., 91, doi: 10.1175/2010BAMS3017.1.

21. Selby, M., 1993. Hillslope Materials and Processes, 2nd edn, Oxford University Press, New

22. York, 451 pp.

23. Sidle, R., and A. Pearce, and C. O‘Loughlin, 1985. Hillslope Stability and Land Use, American

24. Geophysical Union.

25. Sidle, R. 1992. A theoretical model of the effects of timber harvesting on slope stability.

26. Water Resources Res., 28, 1897–1910.

27. van Asch, T., Malet, J., van Beek, L. & Amitrano, D. 2007. Techniques, issues and advaces in

28. numerical modelling of landslide hazard. Bull. Soc. gol. Fr., 178 (2), 65–88.

29. Yu, B., Yang, Y. & Su, Y. 2010. Research on the giant debris flow hazards in Zhouqu county,

30. Gansu province on August 7, 2010. J. Engineering Geology, 18, 437–444 (in Chinese).

31. Zhang, X. & Kondragunta, S. 2006. Estimating forest biomass in the USA using generalized

32. allometric models and MODIS land products. Geophysical Research Letters, 33, L0940.

33. Zhao, M. & Running, S. 2010. Drought-induced reduction in global terrestrial net primary

34. production from 2000 through 2009. Science, 329, 940–943.


For citation:


Ren D., Leslie L., Lynch M., Duan Q., Dai Y., Shangguan W. WHY WAS THE AUGUST 2010 ZHOUQU LANDSLIDE SO POWERFUL?. GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY. 2013;6(1):67-79. https://doi.org/10.24057/2071-9388-2013-6-1-72-75

Views: 228


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


ISSN 2071-9388 (Print)
ISSN 2542-1565 (Online)