Open AccessCharacteristics of Groundwater Response to Precipitation for Landslide Prevention at Kiyomizu-Dera
Author(s) -
Toru Danjo,
Tomohiro Ishizawa,
Motoaki Fujimoto,
Naoki Sakai,
Ryoichi Fukagawa
Publication year - 2017
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.2017.p0993
Subject(s) - typhoon , groundwater , landslide , precipitation , hydrology (agriculture) , slope failure , environmental science , elevation (ballistics) , geology , geotechnical engineering , meteorology , climatology , geography , geometry , mathematics
Every year in Japan, slope failures often occur due to heavy rainfall during the wet season and typhoon season. The main reasons for soil failure are thought to be the increase of soil weight from infiltrated precipitation, the decrease in shear strength, and effects of the increase groundwater elevation. It is therefore important to consider to characteristics of groundwater behavior to improve slope disaster prevention. Kiyomizu-dera experienced major slope failures in 1972, 1999, and 2013, and a large slope failure occurred nearby in 2015. The two most recent events occurred since observation of precipitation and groundwater conditions began at the site in 2004. In this research, we determine the relationship between rainfall and groundwater level using both a full-scale model experiment and field measurements. Results indicate strong connection between rainfall intensity and the velocity of increase in groundwater level, indicating that it is possible to predict changes in the groundwater level due to heavy rainfall.