Features of Landslide in Dam Reservoir

Abstract

It is important to predict the location and magnitude of landslides when planning for disaster prevention and mitigation. Locations where landslides may occur and flat sizes are organized by topographical interpretation. Furthermore, the depth measurements required to determine the scale of active landslides and the relationship between the plane shape and depth are established for use in estimating the depth of a landslide; this is mainly carried out by the Sabo project. To further develop the results that are currently being organized, it is necessary to collect information regarding landslides that are currently inactive. This study aimed to enable the estimate of the depth of a landslide by using the plane range, which can be determined without any fieldwork. The results of landslide studies conducted around reservoirs （23 dams, 214 blocks）at the time of dam construction were collected, organized, and analyzed. During the analysis, the relationship between the plane range and depth was determined without any fieldwork, and the distribution range of the minimum and maximum values was obtained. The results show that the maximum value representing the relationship between the width and maximum estimated depth （D）is D＝0.45×W, while that representing the relationship between the length and maximum estimated depth is D＝0.40×L.