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珠江蕉门分汊河口分流比水槽实验研究

姚鹏 余志斌 苏敏 安欣禧 周曾

姚鹏,余志斌,苏敏,等. 珠江蕉门分汊河口分流比水槽实验研究[J]. 海洋学报,2022,44(x):1–10 doi: 10.12284/hyxb2022055
引用本文: 姚鹏,余志斌,苏敏,等. 珠江蕉门分汊河口分流比水槽实验研究[J]. 海洋学报,2022,44(x):1–10 doi: 10.12284/hyxb2022055
Yao Peng,Yu Zhibin,Su Min, et al. Flume experiment on flow division ratio of bifurcated Jiaomen outlet in the Pearl River Delta[J]. Haiyang Xuebao,2022, 44(x):1–10 doi: 10.12284/hyxb2022055
Citation: Yao Peng,Yu Zhibin,Su Min, et al. Flume experiment on flow division ratio of bifurcated Jiaomen outlet in the Pearl River Delta[J]. Haiyang Xuebao,2022, 44(x):1–10 doi: 10.12284/hyxb2022055

珠江蕉门分汊河口分流比水槽实验研究

doi: 10.12284/hyxb2022055
基金项目: 国家自然科学基金(51809296,51709288);河口海岸学国家重点实验室开放基金资助项目(SKLEC-KF202006);中央高校基本科研业务费项目(2019B04514,2019B05914);江苏省“双创博士”项目;河海大学优秀硕士学位论文培育计划。
详细信息
    作者简介:

    姚鹏(1987-),男,山东省菏泽市人,副教授,博士,主要从事河口海岸水沙动力方面研究。E-mail:p.yao@hhu.edu.cn

    通讯作者:

    苏敏(1986-),女,副教授,博士,主要研究河口海岸动力地貌演变方面研究。E-mail:sumin@hhu.edu.cn

  • 中图分类号: P737.1

Flume experiment on flow division ratio of bifurcated Jiaomen outlet in the Pearl River Delta

  • 摘要: 珠江蕉门承泄西北江的径流泥沙,为珠江主要的泄洪排沙口门,与虎门通过横向汊道凫洲水道连通,其分水分沙的比例对粤港澳大湾区防洪及通航安全至关重要。针对凫洲水道分流比问题,本文基于蕉门分汊河口的形态特点及地貌特征,设计系列水槽实验,探究凫洲水道分流比、分流比影响因子及其变化趋势等。结果表明:在保证宽度比、深度比和流量比均相似的情况下,该水槽实验可较高精度的模拟蕉门分汊河口分流比。凫洲水道分流比受到蕉门与虎门共同影响:虎门与蕉门的相对流速比越大,凫洲水道分流比越大,其主汊地位越明显。在现有的地貌特征条件下,凫洲水道主支汊转变的阈值是虎门与蕉门相对流速比为0.35。研究成果可为蕉门整治、保障其行洪通航安全等提供参考依据。
  • 图  1  珠江三角洲蕉门与虎门、凫洲水道位置示意图

    Fig.  1  The location of Jiaomen and Humen outlets, Fuzhou channel of the Zhujiang River Delta

    图  2  水槽模型设计及仪器布置平面图(a)与正视图(b)

    Fig.  2  Flume experiment design and instruments layout: top view (a) and front view (b)

    图  3  控制断面分布图

    Fig.  3  Control section distribution

    图  4  凫洲水道分流比随断面流速比的变化

    Fig.  4  Variation of flow division ratio of Fuzhou channel with velocity ratio between Humen and Jiaomen

    图  5  凫洲水道分流比及分流流量随虎门、蕉门流速比变化(虎门流速不变)

    Fig.  5  The relationship between variation of flow division ratio, water discharge of Fuzhou channel and flow discharge of Jiaomen(in case of constant Humen velocity)

    表  1  伶仃洋东四口门水沙分配表[19]

    Tab.  1  Distribution of water and sediment discharge of the east four outlets in the Lingding Bay

    口门径流量/亿m3占四大口门/%悬沙输沙量/万t占四大口门/%
    虎门57834.699527.2
    蕉门54132.4132336.1
    洪奇门20012.048913.3
    横门35121.085723.4
    总计16701003664100
    下载: 导出CSV

    表  2  实验工况设计表

    Tab.  2  Parameter setting of series of experimental scenarios

    工况V1/cm·s−1V2/cm·s−1V1/V2
    14200.2
    28200.4
    310200.5
    412200.6
    5(基准实验)16200.8
    6(基准实验)20201
    724201.2
    82418.51.3
    924141.7
    1024122
    1124102.4
    下载: 导出CSV

    表  3  实验分流比结果数据

    Tab.  3  Measured flow division ratio under different scenarios

    工况设计流速比V1/V2实测流速比V1/V2断面5分流比μ
    10.200.2020.45
    20.400.4270.54
    30.500.5910.58
    40.600.6460.61
    5(基准实验)0.800.7490.62
    6(基准实验)1.001.0320.75
    71.201.2210.77
    81.301.2880.80
    91.801.7730.91
    102.001.9400.98
    112.402.3410.99
    下载: 导出CSV
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  • 收稿日期:  2021-06-16
  • 修回日期:  2021-10-11
  • 网络出版日期:  2022-02-16

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