# 长江口水流盐度数值模拟【作者】罗小峰 【导师】陈志昌

【作者】罗小峰 【导师陈志昌
【作者基本信息】南京水利科学研究院，港口海岸及近海工程，2003年，博士

【中文摘要】 长江口由于径流和潮流的相互消长，盐水入侵极其复杂。论文参考已有的研究成果并运用现场实测资料，对长江口地区河床及动力特性及其对盐水入侵所产生的影响进行分析，探索了盐度随时间和空间变化规律。 建立了潮汐河口平面二维、三维水流盐度数学模型，并开发了包括建模、计算和演示的完整数值模拟系统，在系统编制中提出了计算过程可视化概念。 运用平面二维水流盐度数学模型对包括杭州湾在内的长江口大模型进行模拟，验证结果与实测资料基本一致。对整个长江口地区水流盐度进行了各种水情组合模拟计算，并与现场资料分析结果进行对比，进一步从宏观上了解长江口地区盐水入侵的规律及影响的动力因素。通过拦门沙水域的盐度滩槽变化分析，得出拦门沙地区盐度随水流的扩散输移的一般规律。 利用三维斜压水流盐度数学模型对北槽区域进行了模拟计算。研究了盐水入侵产生的斜压项和水面比降项在潮周期中的相对关系，并分析了斜压项对水流的作用。结合正在进行的航道治理工程，在模型中探讨了航道增深后对盐水入侵的影响。

【英文摘要】 Because of the mutual growth and decline of runoff and tied, salinity intrusion of Yangtze estuary is complex. Referring previous research accomplishment and utilizing the information of field measurement, regular patterns of salinity intrusion are obtained by analysis of all kinds of factors such as riverbed and power property.Using Microsoft Visual C++, complete simulation system of 2D & 3D tidal estuary current-salinity including builds mould, calculation and demonstration is developed. A new concept of Computing Process Visualization is imported in the system.Model including Hangzhou gulf and Yangtze estuary is simulated by 2D mould. Verification result is consistent with field data. Using all kinds of dynamic combinations to imitate, and contrasting with the analysis result, further law of power factor and influence is obtained.Tide and salinity in north channel area is studied by 3D model. Comparing the salinity gradient and water level gradient in tide period, regularity of ...更多the effect on tidal structure is established. Tide and salinity change of different depth plan is analysed combine the channel training project.  还原

【中文关键词】 长江口; 盐水入侵; 数值模拟
【英文关键词】 Yangtze Estuary; Salinity intrusion; Numerical model

TAG: 长江 陈志昌 导师 数值模拟
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