Open AccessA Prediction Method for Slope Failure by Means of Monitoring of Water Content in Slope-Soil Layer
Author(s) -
Masaharu Fujita,
Seitaro Ohshio,
Daizo Tsutsumi
Publication year - 2010
Publication title -
journal of disaster research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.332
H-Index - 18
eISSN - 1883-8030
pISSN - 1881-2473
DOI - 10.20965/jdr.2010.p0296
Subject(s) - vegetation and slope stability , slope failure , slope stability , landslide , geotechnical engineering , environmental science , geology , slope stability probability classification , water content , hydrology (agriculture) , slope stability analysis , soil science
Slope failure is generally predicted based on rainfall data. For example, a critical line for slope failure in an area is drawn on coordinates of hourly and cumulative precipitations, and we can predict that slope failure occur somewhere in the area when rainfall condition crosses the critical line into the occurrence region. As slope failure depends greatly on the water content condition in slope-soil layer before the rainfall event, the rainfall amount up to slope failure occurrence must be different. Also, such a method merely predicts the possibility of slope failure in the area at a time stage of the rainfall event. In this paper slope failure was simulated under different geographical and rainfall conditions, taking actual slopes as examples, and the simulation results indicate that water content in an individual slope-soil layer is an adequate index for predicting the collapse of the slope. The characteristics of sediment disaster such as the relationship between slope failure magnitude and rainfall condition is discussed and an idea for evacuation system for successively occurrence of slope failures based on the index is presented.