摘要
为了研究非恒定流水域盐水入侵后的水流特性,利用ECOMSED三维海洋水动力模型,对该水域的潮流场和盐度场进行了三维数值模拟。模拟结果显示:在水槽弯曲处靠近主流线一侧盐度较高;靠近河口处的盐度纵向变化受潮差影响较大;底层咸水入侵的最远距离远大于表层;盐水分层现象在小潮时相对更为明显。该数学模型基本反映了非恒定流水域的盐水入侵特性,并可用于进一步分析盐分输移的机理以及预测盐度的分布情况。
In order to study the flow characteristics of unsteady fresh - salt water mixing area , three - dimensional marine hy-drodynamic model of ECOMSED was used to simulate tidal current field and salinity field. The simulation results show that the salinity near the mainstream line is greater than that near the other side at sink bends; the longitudinal variation of salinity near the estuary is greatly affected by the tidal range ; the maximum distance of saltwater intrusion at the bottom is much greater than that on the surface ; saltwater stratification is more obvious during the neap tide. The mathematical model basically reflects the laws of saltwater intrusion in unsteady - flow water area and can be used to analyze the mechanism of salt transportation and fore-cast the distribution of salinity.
出处
《人民长江》
北大核心
2017年第15期30-34,75,共6页
Yangtze River
基金
国家自然科学基金项目(50679050)
