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JDR Vol.12 No.5 pp. 993-1001
doi: 10.20965/jdr.2017.p0993
(2017)

Paper:

Characteristics of Groundwater Response to Precipitation for Landslide Prevention at Kiyomizu-Dera

Toru Danjo*,†, Tomohiro Ishizawa*, Masamitsu Fujimoto**, Naoki Sakai*, and Ryoichi Fukagawa**

*Department of Storm, Flood and Landslide Research,
National Research Institute for Earth Science and Disaster Resilience (NIED)
3-1 Tennodai Tsukuba, Ibaraki 305-0006, Japan

Corresponding author

**College of Science and Engineering, Ritsumeikan University, Shiga, Japan

Received:
April 3, 2017
Accepted:
July 6, 2017
Online released:
September 27, 2017
Published:
October 1, 2017
Keywords:
rainfall intensity, groundwater level, field measurement, full scale model experiment
Abstract

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.

References
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Last updated on Oct. 20, 2017