[H-TT19] New Developments in Shallow Geophysics

Thu. May 24, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Kyosuke Onishi(Public Works Research Institute), Kunio Aoike(Oyo corporation), Keisuke Inoue(国立研究開発法人　農業・食品産業技術総合研究機構, 共同), Tishiyuki Yokota(National Institute of Advanced Industrial Science and Technology)

The session of shallow geophysics calls many research contributions on geophysical exploration techniques for the near surface. Our target depth is strictly restricted in the depth zone from 5 cm to 30 m (or from 2 in to 100 ft) below the surface of the ground. It may be the closest unknown territory for human society and advanced societies cannot have controlled yet to avoid disasters caused by dynamics in the shallow near surface. Peoples require techniques to manage levee, landslide and earth constructions also knowledge to control groundwater, liquefaction and soil pollution. The near surface has many geotechnical, environmental and hydrogeologic problems.
Major survey techniques are surface wave method, electric exploration, ground-penetrating radar and land streamer, but any methods will be discussed if your target is located in the specified depths. This session welcomes to discuss laboratory tests and rock physics for unconsolidated porous media in the vadose zone. Also, we will welcome not only cutting-edge technologies but also classic theory, if the knowledge is useful for human living.

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[HTT19-P01] Seismic waveform changes associated with precipitation revealed by a geophone array and DAS

*Junzo Kasahara^1,5,6, Yoko Hasada³, Yoshihiro Sugimoto², Hirotaka Kawashima², Yasutomo Yamauchi², Takashi Yamaguchi¹, Kenji Kubota⁴ (1.ENAA, 2.Dia consulting Co. Ltd, 3.Daiwa Exploration and Consulting Co. Ltd, 4.CRIEPI, 5.Tokyo University of Marine Science and Technology, 6.Shizuoka Univ..)

[HTT19-P02] Applicability of the fiber optic DAS(Distributed Acoustic Sensor) to the calculation of surface wave dispersion curves.

*Yasutomo Yamauchi¹, Junzo Kasahara^2,5, Yoko Hasada³, Hirotaka Kawashima¹, Yoshihiro Suigimoto¹, Takashi Yamaguchi², Kenji Kubota⁴ (1.DIACONSULTANTS CO.,LTD, 2.Engineering Advancement Association of Japan, 3.Daiwa Exploration and Consulting Co.,Ltd., 4.Central Research Institute of Electric Power Industry, 5.Tokyo University of Marine Science and Technology)

[HTT19-P03] Surface seismic survey using horizontal ground vibrations for monitoring shallow ground conditions

*Kyosuke Onishi¹, Hiroshi Kisanuki¹, Takanori Ogahara¹, Tomio INAZAKI¹ (1.Public Works Research Institute)

[HTT19-P04] A technique to estimate phase velocities using a two-sensor array

*Hidetaka Shiraishi¹ (1.Center for Environmental Science in Saitama)

[HTT19-P05] Evaluation of site amplification factors using seismic observation and miniature array analysis of microtremors in Zushi City

*Yoshiya Oda¹, Kohei Kosaka¹, Yuta Aoki¹ (1.Tokyo Metropolitan Univ.)

[HTT19-P06] Very shallow S-wave seismic reflection survey across the surface rupture of 2014 Naganoken-hokubu earthquake, central Japan

*Shinsuke Okada¹, Takahashi Naoya², Kazuo Yamaguchi³, Tatsuya Sumita³, Yuichi Niwa⁴, Keitaro Komura⁵, Haruo Kimura⁵ (1.International Research Institute of Disaster Science, Tohoku University, 2.Graduate School of Science, Tohoku University, 3.National Institute of Advanced Industrial Science and Technology, 4.Faculty of Science and Engineering, Chuo University, 5.Central Research Institute of Electric Power Industry)

[HTT19-P07] Monitoring of Shear-wave velocity in the vadose zone.

*Hiroshi Kisanuki¹, Tomio INAZAKI¹, Kyosuke Onishi¹ (1.Public Works Research Institute)

[HTT19-P08] Geophysical Investigation under Agricultural Facility Damaged by the 2016 Kumamoto Earthquak

*Keisuke Inoue¹, Kosuke Wakasugi¹, Ryosuke Nomiyama¹, Nobuhisa Koga¹, Hiroshi Niimi¹, Hirotaka Ihara¹, Tsuyoshi Yamane¹, Keiko Nakano¹ (1.National Agriculture and Food Research Organization)

[HTT19-P09] Case study of clarifying on the shallow rock mass condition and the resistivity distribution inside the tunnel under construction

*Kenji OKAZAKI¹, Toshiyuki KURAHASHI¹ (1.Civil Engineering Research Institute for cold region, Public Works Research Institute)

[HTT19-P10] GPR survey in mud volcanoes at Goshougake hot spring in Akita prefecture

*Inoue Yusuke¹, Tomoki Tsutsui¹, Shin'ya Sakanaka¹ (1.Graduate School of International Resource Sciences in Akita University)

[HTT19-P11] Surveying the shallow structure of paved roads using multi-channel ground-penetrating radar