Study on monitoring system of soil moisture and groundwater levels using ultrasonic wave to predict slope failures

2014 Fiscal Year Final Research Report

• Project/Area Number: 23510230
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Natural disaster science
• Research Institution: Ritsumeikan University
• Principal Investigator: TANAKA Katsuhiko 立命館大学, 総合科学技術研究機構, 教授 (00367997)
• Co-Investigator(Kenkyū-buntansha): FUKAGAWA Ryoichi 立命館大学, 理工学部, 教授 (20127129) ; SAKO Kazunari 鹿児島大学, 理工学研究科, 准教授 (20388143) ; FUJIMOTO Masamitsu 立命館大学, 理工学部, 助教 (60511508)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 豪雨斜面崩壊 / モニタリング / 超音波 / 水分 / 水位

Outline of Final Research Achievements

We have previously investigated a measurement method of soil moisture and groundwater level using ultrasonic wave for predicting slope failure. To apply this method to a practical field monitoring,we fabricated a multichannel monitoring system and tried to use this system in field tests,and pointed out the problems. Thunderbolt protection and detecting method for inhomogeneous soil particles were developed to use this system in a practical field monitoring. For inhomogeneous coarse-grained soils, covering the detecting surface with a homogeneous fine soil such as Toyoura sand was effective to obtain repeatable data for wetting and drying cycles.

Free Research Field

斜面崩壊