Causes of landslide recurrence in a loess platform with respect to hydrological processes

Irrigation-induced landslide is a recurring problem in the Heifangtai loess platform of northwest China. The landslide sites are characterized by a concave topography. Numerical modeling indicates that the groundwater table at the past-landslide site rises more quickly than the other natural platfor...

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Bibliographic Details
Published in:Natural hazards (Dordrecht) 2012-11, Vol.64 (2), p.1657-1670
Main Authors: Xu, Ling, Qiao, Xiaojuan, Wu, Caixia, Iqbal, Javed, Dai, Fuchu
Format: Article
Language:English
Subjects:
China (People's Republic)
Civil Engineering
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environmental Management
Environmental policy
Exact sciences and technology
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Groundwater
Hydrogeology
Hydrology
Irrigation
Landslides
Landslides & mudslides
Liquefaction
Loess
Mathematical models
Natural Hazards
Natural hazards: prediction, damages, etc
Original Paper
Platforms
Pore water
Slopes
Soil (material)
Tables (data)
Topography
Water
Water pressure
Water table
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Summary:Irrigation-induced landslide is a recurring problem in the Heifangtai loess platform of northwest China. The landslide sites are characterized by a concave topography. Numerical modeling indicates that the groundwater table at the past-landslide site rises more quickly than the other natural platform borders under irrigation conditions. This is consistent with the field observations that seepage of the groundwater appeared in the hollow is higher than that of lateral slopes. In order to investigate the response of soil behavior due to rise in groundwater table, stress-path tests were performed on undisturbed specimens. It has been observed that the increase in pore water pressure in loess can trigger soil liquefaction and eventually results in landslide. Hence, the concave past-landslide site is much more prone to landsliding, which contributed to the landslide recurrence.
ISSN:0921-030X
1573-0840
DOI:10.1007/s11069-012-0326-y