NUMERICAL STUDY OF SETTLING AND TRANSPORT OF SEDIMENT DISCHARGED FROM LARGE RIVER MOUTH - AN APPLICATION TO THE OKOZU RIVER MOUTH -
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- OTAKE Takeshi
- 長岡技術科学大学大学院 工学研究科 建設工学専攻
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- BADARCH Ayuruzana
- 長岡技術科学大学大学院 工学研究科 エネルギー環境工学専攻
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- HOSOYAMADA Tokuzo
- 長岡技術科学大学 環境社会基盤工学
Bibliographic Information
- Other Title
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- 大規模河川の河口から放出される土砂の海底への沈降と堆積過程の計算 -大河津分水路の河口を対象として-
- ダイキボ カセン ノ カコウ カラ ホウシュツ サレル ドシャ ノ カイテイ エ ノ チンコウ ト タイセキ カテイ ノ ケイサン : ダイ カワズ ブンスイロ ノ カコウ オ タイショウ ト シテ
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Abstract
Estuaries of the large river discharge river waters and sediment to the sea. The discharged sediment is mainly the wash load, which is affected by density currents, tide, inertia forces of river discharge. Sediment which has repulsive force in pure water, lost electrical charge when it meets sea water and finally made flocculation caused by molecular attractive force. To understand distribution of the sediment in sea bottom, above mentioned phenomena should be included in numerical simulation algorithm for sediment transport model. In this study, a numerical algorithm for sediment particle transport under the effects of flocculation is originated. The algorithm is mainly based on the Lagrangian method. The performance of the numerical method is confirmed by the Lock-exchange flow in laboratory scale case. Application of the method to field scale calculation is conducted for the Okozu diversion channel in the Shinano River mouth. Settling of the sediment through the pycnocline is visualized with high resolution.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 72 (4), I_355-I_360, 2016
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390282680330110208
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- NII Article ID
- 130005312051
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- NII Book ID
- AN10426673
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- ISSN
- 18808751
- 2185467X
- 09167374
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- NDL BIB ID
- 027166254
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed