Bedload measurement by acoustic energy with Hydrophone for high sediment transport rate

• MIZUYAMA Takahisa

  Graduate School of Agriculture, Kyoto University

• MATSUOKA Miwa

  Graduate School of Agriculture, Kyoto University

• NONAKA Michinobu

  HydroTech Co., Ltd.

Bibliographic Information

Other Title

• 流砂量の多い状態のハイドロフォンによる流砂計測（音圧データの取得）
• リュウサリョウ ノ オオイ ジョウタイ ノ ハイドロフォン ニ ヨル リュウサ ケイソク オンアツ データ ノ シュトク

Abstract

Hydrophone has been used to measure bedload transport intensity by counting the number of pulses made by hitting of sand and gravels to a steel pipe. When sediment transport rate is high, the sound level is continuously high and never drops low resulting in that the number of counting becomes low or zero. Sound level is recorded to know sediment transport intensity instead of pulses when sediment transport rate is high. The method was adopted in the Waru-dani torrent, a branch of the Jinzu River. The relationship between acoustic energy and pulses were analyzed. The acoustic energy was well recorded and showed sediment transport intensity as well as the record of pulses. It was found that there is an appropriate amplification. As we have not obtained good data for high sediment transport rate, we will continue the measurement.

Journal

• Journal of the Japan Society of Erosion Control Engineering

  Journal of the Japan Society of Erosion Control Engineering 61 (1), 35-38, 2008-05-15

  Japan Society of Erosion Control Engineering

Keywords

• bedload measurement
• hydrophone
• acoustic energy

Details

• CRID: 1390001205478742400
• NII Article ID: 130004662120
• NII Article ID: 10021228359
• NII Book ID: AN0012035X
• DOI: 10.11475/sabo.61.1_35
• ISSN: 21874654
• ISSN: 02868385
• NDL BIB ID: 9522327
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9522327
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed