小川原湖に発生する傾斜プルームの音響探査観測 Field Measurement of the Inclined Plume in Lake Ogawara with Echo Sounder

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An inclined plume, generated by saline water, is visualized with an echo sounder. The output signal is stored as digital data so that the picture of reflection distribution can be reproduced with any intensity scale and size by post-processing. The pictures are compared with the data of salinity and temperature profiles obtained from STD measurement. The location of horizontal streaks in the picture of echo image corresponds to the depth of density jumps although the intensity of streaks does not correspond to the intensity of density jumps. The densimetric interface of the inclined plume can be identified as the lowest streak along the bottom.<BR>Richardson number of the plume(Ri) is estimated from the amplitude of stationary wave on the undulations of the bed topography based on an assumption of the local conservation of specific energy. The estimated Ri and the entrainment coefficient(E) calculated from the data of STD measurement show that E decreases rapidly when Ri approaches to 1.0. This fact means that the frequently used relationship of power law does not hold well.

収録刊行物

  • 可視化情報学会誌 = Journal of the Visualization Society of Japan  

    可視化情報学会誌 = Journal of the Visualization Society of Japan 19(72), 34-41, 1999-01-05 

    The Visualization Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002003903
  • NII書誌ID(NCID)
    AN10374478
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09164731
  • NDL 記事登録ID
    105812
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z15-431
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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