Development of the realtime rain gauge for the evaluation of slope stability during guerrilla-like rainfall

• KOYAMA Tomofumi

  Department of Urban and Environmental Engineering, Kyoto University

• TAKAHASHI Kenji

  Suimon-Gijutsu Consultant Co. Ltd.

• NISHIKAWA Kei-ichi

  Mitsubishi Electric Co. Ltd.

• OHNISHI Yuzo

  Executive, Vice President, Kyoto University

Bibliographic Information

Other Title

• ゲリラ豪雨による斜面安定性評価のためのリアルタイム雨量計の開発

Abstract

This paper presents the newly developed realtime rain gauge and its application to the numerical simulations for slope stability problems. The newly developed realtime rain gauge uses the ultrasonic revel meter and can measure the torrential rainfall so called guerrilla-like rainfall with good accuracy comparing with the conventional tipping-bucket rain gauge. The measured realtime rainfall data can be used to the numerical simulations as rain intensity along the rainfall boundary. The numerical simulation results clearly show that the rapid and drastic change of the matric suction and water content around the ground surface can not be evaluated accurately by conventional method using rainfall per hour as rain intensity. Hence, the realtime measurement of rainfall is required to evaluate the impacts of the torrential rainfall on the mechanisms for rainwater infiltration into the slopes and rainfall-induced slope instability/failure correctly.

Journal

• Japanese Geotechnical Journal

  Japanese Geotechnical Journal 5 (1), 61-67, 2010

  The Japanese Geotechnical Society

Keywords

• guerrilla-like rainfall
• slope stability
• realtimr rain gauge
• rainfall intensity
• saturated-unsaturated flow simulation

Details

• CRID: 1390282680235421312
• NII Article ID: 130004482807
• DOI: 10.3208/jgs.5.61
• ISSN: 18806341
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed