A 3D ground penetrating radar imaging of the heavy rainfall-induced deformation around a river levee

A case study of Ara River, Saitama, Japan

Toshiyuki Yokota, Tomio Inazaki, Shunsuke Shinagawa, Takumi Ueda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper describes a three-dimensional ground penetrating radar (GPR) survey carried out around a levee of the Ara River in Saitama, Japan, where deformation of the ground was observed after heavy rainfall associated with the typhoon of September 2007. The high-density 3D GPR survey was conducted as a series of closely adjacent four directional sets of 2D surveys at an area surrounding vertical cracks on the paved road caused by deformations induced by heavy rain. The survey directions of the 2D surveys were 0, 90, 45, and 45 degrees with respect to the paved road and the intervals between lines were less than 0.5m. The 3D subsurface structure was accurately imaged by the result of data processing using Kirchhoff-type 3D migration. As a result, locations and vertical continuities of the heavy rainfall induced cracks in the paved road were clearly imaged. This will be a great help in considering the generation mechanisms of the cracks. Moreover, the current risk of a secondary disaster was found to be low, as no air-filled cavities were detected by the 3D GPR survey.

Original languageEnglish
Pages (from-to)49-55
Number of pages7
JournalExploration Geophysics
Volume40
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

ground penetrating radar
levee
rivers
Japan
rainfall
roads
river
crack
cracks
road
disasters
rain
typhoon
continuity
disaster
cavity
intervals
cavities
air

Keywords

  • 3D survey.
  • Ground penetrating radar
  • High-density survey
  • River levee

ASJC Scopus subject areas

  • Geology
  • Geophysics

Cite this

A 3D ground penetrating radar imaging of the heavy rainfall-induced deformation around a river levee : A case study of Ara River, Saitama, Japan. / Yokota, Toshiyuki; Inazaki, Tomio; Shinagawa, Shunsuke; Ueda, Takumi.

In: Exploration Geophysics, Vol. 40, No. 1, 2009, p. 49-55.

Research output: Contribution to journalArticle

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