河口域に堆積する有機物を含む細粒泥の特性把握に関する考察  [in Japanese] REMARKS ON PROPERTY MEASUREMENTS OF THE FINE GRAINED SEDIMENT CONTAINING ORGANIC MATTER  [in Japanese]

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Abstract

感潮河川では海水の遡上とともに河口から運ばれる有機泥が高塩分下で河岸干潟に堆積している.高塩分下で堆積する有機泥は有機泥,間隙水,流水中に存在するイオンの相互作用により輸送過程における物理運動に強い影響を与えている.本論文ではヘドロ化が進んだ河岸干潟において地盤を形成する有機泥の特性量を評価するためのテクスチャーとなる物理・化学量の個々の特性および相互の関係を考察した.さらに,感潮河川で輸送・堆積する有機泥の基本となる指標とその評価法についてまとめた.提案されたテクスチャーから実河川における有機泥の輸送・堆積状態について推定し,テクスチャーの妥当性を確認した.

 In tidal rivers, sediment is transported from the river mouth to the upstream by sea water intrusion under tidal fluctuations, and accumulates on the river tidal flats under high salinity conditions. This sediment is strongly affected by various motions in the course of bed load transport because of the interactions occurred due to different ion conditions of pore water and flowing water. In this paper, we proposed the texture based on correlations (individual or reciprocal reaction) between physical and chemical conditions, and evaluated properties (organic and accumulation conditions) of sediments accumulated on river tidal flats using observation data and the texture. We also summarized basic indexes and methods for evaluating the sediment properties.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71(2), I_1471-I_1476, 2015

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130005109378
  • Text Lang
    JPN
  • ISSN
    1884-2399
  • NDL Article ID
    027097434
  • NDL Call No.
    YH267-236
  • Data Source
    NDL  J-STAGE 
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