Bedload Detection with a Pipe Geophone: Field Experiments at the Gentaro Sabo Dam on the Hira River

An experimental field survey was conducted at the Gentaro sabo dam to evaluate the basic characteristics of a geophone placed on the spillway of the Hira River. A geophone is a device used to measure sediment discharge by picking up sounds of sediment particles that hit steel pipes located in a rive...

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Published inInternational Journal of Erosion Control Engineering Vol. 3; no. 2; pp. 126 - 129
Main Authors KANNO, Tadahiro, YOSHIDA, Toshiyasu, MIYAZAWA, Kazuhisa, HIDA, Yoshihisa
Format Journal Article
LanguageEnglish
Published Japan Society of Erosion Control Engineering 2010
Subjects
Acoustics
Discharge
Freshwater
Kinetic energy
Picking
Pipe
Rivers
Sediments
Voltage
Water depth
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Summary:An experimental field survey was conducted at the Gentaro sabo dam to evaluate the basic characteristics of a geophone placed on the spillway of the Hira River. A geophone is a device used to measure sediment discharge by picking up sounds of sediment particles that hit steel pipes located in a riverbed. This study analyzed kinetic energy and sediment discharge in relation to acoustic energy, i.e., voltage data recorded and sensitivity of detection. Results of this study showed that 1) data exceeding one particle's kinetic energy of 30 × 10-9 kg m2/sec2 ( a 2.0-mm particle or larger) should be selected when acoustic energy is analyzed; 2) a high correlation between acoustic energy and sediment discharge shows that sediment discharge can be analyzed from acoustic energy; and 3) the sensitivity of detection can be analyzed when the size of particles hitting the geophone and water depth are known.
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ISSN:1882-6547
1882-6547
DOI:10.13101/ijece.3.126