波流共同作用下磨刀门河口余流特征分析  

Characteristics of residual current in Modaomen Estuary under wave-current interaction

作　　者：汪玉平 何威 陈妍宇 辜伟芳 许庆 WANG Yuping;HE Wei;CHEN Yanyu;GU Weifang;XU Qing(Marine Academy of Zhejiang Province,Hangzhou 310012,China)

机构地区：[1]浙江省海洋科学院,浙江杭州310012

出　　处：《水运工程》2024年第9期20-26,共7页Port & Waterway Engineering

摘　　要：磨刀门河口水动力条件复杂,波浪作用明显,波浪影响下磨刀门河口余流特征的研究较少。本文基于SCHISM模型,建立二维波流耦合数值模型,通过比较有波浪和无波浪影响的河口余流特征,分析波浪对余流的影响,并从余流角度定性分析交杯四沙演变特征。结果表明:磨刀门河口西汊余流动力较强,西侧龙屎窟水道出口处余流较小,四沙水域受波浪作用较明显,余流动力介于两者之间。四沙水域余流流向在波浪作用下发生较大改变;交杯四沙在西汊强劲余流以及波浪掀沙作用下,四沙脊线有向西顺时针偏转趋势。The hydrodynamic conditions of Modaomen Estuary are complex and the wave action is obvious.However,There is relatively little research on the residual currents characteristics in Modaomen Estuary under the influence of waves.This article is based on the SCHISM model and establishes a two-dimensional wave-current coupling numerical model.By comparing the characteristics of estuarine residual current in estuaries with and without wave influence,the impact of waves on the residual current is analyzed.Qualitatively analysis is conducted on the evolution characteristics of No.4 Jiaobei Sand from the perspective of residual current.The results show that the residual current force in the west branch of Modaomen estuary is relatively strong,and the residual current at the exit of Longshiku waterway on the west side is relatively small.Near the No.4 Jiaobei Sand,wave action is more obvious,and the residual current force is somewhere in between.Direction of residual current has a great change under the action of wave.Under the action of the strong residual current from the west branch and the wave lifting force,the ridge line of No.4 Jiaobei Sand has a tendency to deflect clockwise to the west.

关 键 词：SCHISM模型 波流共同作用 余流 磨刀门河口 

分 类 号：TV148[水利工程—水力学及河流动力学] U61[交通运输工程—船舶及航道工程]