Analysis of the relationship of landslide occurrence with rainfall

Author(s)
Shibiao Bai, Jian Wang, Benni Thiebes, Chen Cheng, Yipeng Yang
Abstract

Landslides are a significant hazard in many parts of the world and represent an important geohazard in China. Rainfall is the primary triggering agent for landslides and often used for prediction slope failures. However, the relationship between rainfall and landslide occurrences is very complex. Great efforts have been made on the study of regional rainfall-induced landslide forecasting models in recent years; still, there is no commonly accepted method for rainfall-induced landslide prediction. In this paper, the quantitative antecedent soil water status (ASWS) model is applied to investigate the influence of daily and antecedent rainfall on the triggering of landslides and debris flows. The study area is Wudu County in Gansu Province, an area which exhibits frequent landslide occurrences. The results demonstrate a significant influence of high intensity rainfall events on landslide triggering. Still, antecedent rainfall conditions are very important and once a threshold of approximately 20 mm is exceeded, landslides and debris flows can occur even without additional rainfall. The study presented could also facilitate the implementation of a regional forecasting scheme once additional validation has been carried out.

Organisation(s)
Department of Geography and Regional Research
External organisation(s)
Nanjing Normal University, Ministry of Environmental Protection
Journal
Arabian Journal of Geosciences
Volume
7
Pages
1277–1285
No. of pages
9
ISSN
1866-7511
DOI
https://doi.org/10.1007/s12517-013-0939-9
Publication date
01-2013
Peer reviewed
Yes
Austrian Fields of Science 2012
507013 Regional geography
Portal url
https://ucris.univie.ac.at/portal/en/publications/analysis-of-the-relationship-of-landslide-occurrence-with-rainfall(d15f723f-eb7b-474d-9a24-fd17ee161739).html