Characteristics of Groundwater Response to Precipitation for Landslide Prevention at Kiyomizu-Dera
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- Danjo Toru
- Department of Storm, Flood and Landslide Research, National Research Institute for Earth Science and Disaster Resilience (NIED)
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- Ishizawa Tomohiro
- Department of Storm, Flood and Landslide Research, National Research Institute for Earth Science and Disaster Resilience (NIED)
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- Fujimoto Masamitsu
- College of Science and Engineering, Ritsumeikan University
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- Sakai Naoki
- Department of Storm, Flood and Landslide Research, National Research Institute for Earth Science and Disaster Resilience (NIED)
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- Fukagawa Ryoichi
- College of Science and Engineering, Ritsumeikan University
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Abstract
<p>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.</p>
Journal
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- Journal of Disaster Research
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Journal of Disaster Research 12 (5), 993-1001, 2017-10-01
Fuji Technology Press Ltd.
