冯志勇;吴门伍;吴小明;胡阳;谈广鸣;

• 1:武汉大学水资源与水电工程科学国家重点实验室
• 2:珠江水利委员会珠江水利科学研究院

摘要(Abstract)：

通过不同时期的实测地形,研究了环保清淤工程实施后深圳河的回淤分布特征。利用Delft3D建立了同时考虑悬沙和浮泥运动的深圳河湾平面二维水沙数学模型,探讨了回淤机理和回淤泥沙来源。实测资料表明清淤工程实施后深圳河回淤明显,1 a后的回淤量达20.8万m3,占总清淤量的41.7%。洪季回淤量远大于枯季。模型计算显示清淤工程实施后河道内断面平均流速大幅降低,其中洪季减小量大于枯季减小量。平均落急流速只有工程前的40%,是导致清淤河段快速回淤的直接原因;回淤泥沙来源模拟显示潮流输沙对初期回淤量的贡献最大,达61.9%。随着洪季上游来沙量的增加,上游来沙对回淤量的贡献率增加至46.8%,成为工程河段淤积的主要来源。

关键词(KeyWords)： 泥沙回淤;数学模型;清淤工程;深圳河

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(编号：2018YFC0407800)

作者(Authors): 冯志勇;吴门伍;吴小明;胡阳;谈广鸣;

DOI: 10.14188/j.1671-8844.2020-11-001

参考文献(References)：

• [1]金镠.长江口深水航道回淤物理过程分析及减淤思路探讨[J].水道港口, 2018, 39(4):395-401.Jin Liu. Physical processes of siltation in the Yangtze Estuary Deepwater Navigation Channel and its discussion on sediment reduction[J]. Journal of Waterway and Harbor, 2018, 39(4):395-401.
• [2] Van Maren, D S, Van Kessel, et al. The impact of channel deepening and dredging on estuarine sediment concentration[J]. Continental Shelf Research, 2015,95:1-14.
• [3]何杰,辛文杰.港珠澳大桥沉管隧道基槽异常回淤分析与数值模拟[J].水科学进展, 2019, 30(6):823-833.He Jie, Xin Wenjie. Analysis and numerical simulation of abnormal siltation in foundation trench of immersed tube tunnel of Hongkong-Zhuhai-Macao Bridge[J]. Advances in Water Science, 2019, 30(6):823-833.
• [4]刘杰,程海峰,韩露,等.长江口12.5 m深水航道回淤年际变化及成因[J].水科学进展, 2019, 30(1):65-75.Liu Jie, Cheng Haifeng, Han Lu, et al. Interannual variations on siltation of the 12.5 m deepwater navigation channel in Yangtze Estuary[J]. Advances in Water Science, 2019, 30(1):65-75.
• [5] Kuijper C, Christiansen H, Cornelisse J M, et al.Reducing harbor siltationⅡ:Case study of Parkhafen in Hamburg[J]. Journal of Waterway Port Coastal&Ocean Engineering, 2005, 131(6):267-276.
• [6] Guerra R, Pasteris A, Ponti M. Impacts of maintenance channel dredging in a northern Adriatic coastal lagoon I:Effects on sediment properties,contamination and toxicity[J]. Estuarine, Coastal and Shelf Science, 2009, 85(1):143-150.
• [7]长江勘测规划设计研究院.深圳河河口改善及泥沙淤积规律研究[R].武汉：长江勘测规划设计研究院，2009.Changjiang Institute of Survey, Planning, Design and Research. Study on the improvement of estuary and sedimentation mechanisms in Shenzhen River[R]. Wuhan:Changjiang Institute of Survey, Planning, Design and Research, 2009.
• [8]段余杰,吴门伍,胡小冬,等.深圳河湾生态环境及保护对策分析[J].人民珠江, 2017, 38(1):79-82.Duan Yujie, Wu Menwu, Hu Xiaodong, et al. Ecological environment of Shenzhen Bay and protection measures[J]. Pearl River, 2017, 38(1):79-82.
• [9] Feng Z Y, Tan G M, Xia J Q, et al. Two-dimensional numerical simulation of sediment transport using improved critical shear stress methods[J]. International Journal of Sediment Research, 2020, 35:15-26.
• [10] Deltares. Delft3D-Flow User Manual[M]. Netherlands:Delft, 2014.
• [11] Partheniades E. Erosion and deposition of cohesive soils[J]. Journal of the Hydraulics Division, ASCE, 1965,91(1):105-139.
• [12]张瑞瑾.河流泥沙动力学[M].第2版.北京:中国水利水电出版社, 1998.Zhang Ruijin. River Sediment Dynamics[M]. 2nd edition. Beijing:China Water&Power Press, 1998.
• [13]黄建维.粘性泥沙在静水中沉降特性的试验研究[J].泥沙研究, 1981,(2):30-41.Huang Jianwei. Experimental study of settling properties of cohesive sediment in still water[J]. Journal of Sediment Research, 1981,(2):30-41.
• [14]陆永军,李浩麟,王红川,等.强潮河口拦门沙航道回淤及治理措施[J].水利学报, 2005,36(12):1450-1456.Lu Yongjun, Li Haolin, Wang Hongchuan, et al. Back silting and regulation of waterway with sand bar in strong tidal estuary[J]. Journal of Hydraulic Engineering, 2005,36(12):1450-1456.
• [15]罗肇森,罗勇.浮泥挟沙力和输沙规律的研究和应[J].泥沙研究, 1997,(4):44-48.Luo Zhaosen, Luo Yong. Study on fluid mud-carrying capacity, sediment transport and their application[J].Journal of Sediment Research, 1997,(4):44-48.
• [16]深圳市水务规划设计院股份有限公司.深圳市防洪潮规划修编及河道整治规划[R].深圳:深圳市水务规划设计院股份有限公司, 2013.Shenzhen Water Planning&Design Institute Co., Ltd.The flood tide control planning revision and river regulation planning in Shenzhen[R]. Shenzhen:Shenzhen Water Planning&Design Institute Co., Ltd., 2013.