超音波ドップラー流速分布計による干潟上の浮遊堆積物の観測

• 川西 澄

  広島大学大学院

• 横山 智弥

  広島大学大学院

• 水野 雅光

  国土交通省中国地方整備局太田川河川事務所

• 福岡 捷二

  中央大学研究開発機構

書誌事項

タイトル別名

• MEASUREMENT OF SUSPENDED SEDIMENT ON TIDAL FLAT WITH AN ACOUSTIC DOPPLER CURRENT PROFILER

抄録

Acoustic Doppler current profilers (aDcps) offer the potential for measuring suspended sediment concentration profiles. In recent years, aDcps operating at a few megahertz frequency have been able to measure velocity and backscattered signal profiles with a high degree of temporal and spatial resolution. Moreover, the blanking distance near the transducer becomes short. As a result, the aDcps may attain high-resolution measurements of suspended sediments in the bottom 1-2 m above the bed. However, a modification needs to be made to account for the complex beam pattern close to the transducer (near-field) . In the present study, the backscattered signal of an aDcp operating at 2 MHz is examined. The backscattered signal profiles corrected using the near-field function by Thorne give close agreement with suspended sediment concentration profiles on the tidal flat in an estuary.

収録刊行物

• 水工学論文集

  水工学論文集 52 949-954, 2008

  公益社団法人 土木学会

キーワード

• suspended sediment concentration
• acoustic backscatter
• mud flat
• tidal flow
• estuaries

詳細情報

• CRID: 1390001205171693184
• NII論文ID: 130004044142
• DOI: 10.2208/prohe.52.949
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可