基于FVCOM的磨刀门水道盐水入侵三维数值模拟

发布时间：2018-03-28 08:14

本文选题：盐水入侵　切入点：数值模拟　出处：《水动力学研究与进展(A辑)》2016年03期

【摘要】：该文采用非结构化有限体积近岸海洋三维模型FVCOM(Finite-Volume Coastal Ocean Model),建立了磨刀门水道至伶仃洋盐水入侵数值模型,模拟2004年、2005年及2007年枯季的长序列流场过程,观察其水动力特性,研究盐度的时空变化规律,分析其垂向分层现象。结果表明仅对该文模拟范围的建模也能达到模拟珠江四口门或八口门时磨刀门水道的准确度,从而减少了建模工作量和模型计算量。对三个工况的模拟显示盐水入侵最远距离在2005年1月最大,越过了全禄水厂,2007年3月最小。垂向分层方面,由于盐水上溯的最远距离均处于内河道处,盐度垂向分层不明显,底表层盐水最远入侵距离的差距随入侵距离的增加而减小。海平面平均每升高1 cm,磨刀门水道咸潮入侵平均上移距离为0.85 km。
[Abstract]:In this paper, a numerical model of saltwater intrusion from Motagaomen waterway to Lingdingyang is established by using FVCOM(Finite-Volume Coastal Ocean Modeler, an unstructured finite volume offshore ocean model. The long sequence flow field in the dry seasons of 2004, 2005 and 2007 is simulated, and the hydrodynamic characteristics of the model are observed. The temporal and spatial variation of salinity is studied, and the vertical stratification phenomenon is analyzed. The results show that only the modeling of the simulation range in this paper can achieve the accuracy of simulating the Modaimen waterway with four or eight ports of the Pearl River. The simulation of the three conditions shows that the longest distance of salt water intrusion was the largest in January 2005, which passed the Quanlu Waterworks, and in March 2007, the minimum. Vertical stratification. Because the furthest distance of saltwater is located in the inner channel, the vertical stratification of salinity is not obvious. The distance of the furthest intrusion distance of brine in the bottom layer decreases with the increase of the intrusion distance, and the average upward distance of saltwater intrusion is 0.85 km for every 1 cm rise in sea level.
【作者单位】：中山大学水资源与环境研究中心;
【基金】：国家自然科学基金项目(41301627)~~
【分类号】：P731.2

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