Japan Geoscience Union Meeting 2016

Presentation information

International Session (Oral)

Symbol H (Human Geosciences) » H-DS Disaster geosciences

[H-DS05] Landslides and related phenomena

Thu. May 26, 2016 10:45 AM - 12:15 PM 201A (2F)

Convener:*Masahiro Chigira(Disaster Prevention Research Institute, Kyoto University), Gonghui Wang(Disaster Prevention Research Institute, Kyoto University), Fumitoshi Imaizumi(Faculty of Agriculture, Shizuoka University), David Petley(University of East Anglia), Chair:Issei Doi(Disaster Prevention Research Institute)

10:45 AM - 11:05 AM

[HDS05-07] An investigation on self-potential variation and seismic signals caused by sliding of laboratory scale model slopes

★Invited papers

*Zheng-yi Feng1, Shang-Hao Lin1, Hsueh-Pin Tan1, Han-yi Huang1, Yu-Fang Chiu1 (1.Department of Soil and Water Conservation, National Chung Hsing University, Taichung, Taiwan)

Keywords:landslide, slope, seismic signal, self-potential, model test

This study monitored the self-potential variation and seismic signals during sliding experiments for laboratory scale model slopes when the slopes subject to rainfall and groundwater level increasing. The sensors installed including non-polarized electrodes, accelerometers, pore water pressure gauges, and water content gauges for data collection. The results show that the self-potential variation can be used qualitatively to indicate groundwater condition and movement of the sliding body of the model slopes. The seismic signals caused by the three types of sliding processes of the model slopes, including single sliding, multiple sliding and successive sliding, can be easily identified. In addition, the frequency content and time-frequency spectra of the three sliding processes were calculated and compared. We also found that the amplitude and high frequency portion of the seismic signals were attenuated for the case of a model dip slope with a weak clay layer.