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| Titel |
Characteristic analysis of large-scale loess landslides: a case study in Baoji City of Loess Plateau of Northwest China |
| VerfasserIn |
H. B. Wang, B. Zhou, S. R. Wu, J. S. Shi, B. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 7 ; Nr. 11, no. 7 (2011-07-05), S.1829-1837 |
| Datensatznummer |
250009553
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1829-2011.pdf |
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| Zusammenfassung |
| Landslides are one of the most common geologic hazards in the Loess Plateau
of northwest China, especially with some of the highest landslide densities
found in Shaanxi and adjacent provinces. Prior to assessing the landslide
hazard, a detailed landslide inventory map is fundamental. This study
documents the landslides on the northwest Loess Plateau with high accuracy using
high-resolution Quickbird imagery for landslide inventory mapping in the
Changshou valley of Baoji city. By far the majority of landslides are in
loess, representing small-scale planar sliding. Most of the large-scale
landslides involve loess and bedrock, and the failure planes occurred either
along the contacts between fluvial deposits and Neogene argillites, or
partially within the bedrock. In the sliding zones of a large scale
landslide, linear striations and fractures of the soils were clearly
developed, clay minerals were oriented in the same direction and
microorganism growths were present. From the analysis of microstructure of
sliding soils, it is concluded that the Zhuyuan landslide can be reactivated
if either new or recurring water seepage is caused in the sliding surface.
It can be concluded that most landslides are attributed to the undercutting
of the slope associated with gullying, and numerous ancillary factors
including bedrock-loess interface, slope steepness, vegetation cover and
land utilization. |
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