Abstract
The Yan’an area, located on the Loess Plateau in Northern Shaanxi Province, China, experienced heavy and prolonged rainfall in July 2013, which induced 8,135 slope failures (loess landslides and loess flow-slides), destroying approximately 10,000 cave dwellings and killing 45 people. Field investigations have indicated that the occurrence of loess flow-slides is closely related to infiltration depth, slope angle, slope morphology, rainfall intensity, and loess strength. The results from this study showed that (a) most of the loess flow-slides in Yan’an were small scale, ranging in volume from tens of cubic meters to hundreds of cubic meters; (b) the loess flow-slides only occurred at a depth of 2 m) and can effectively prevent loess flow-slides.
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