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运用可计算河口流场的全三维数值模型研究Gironde河口的河口环流与盐水入侵问题。本模型应用有限差分法求解浅水方程,同时采用模态分裂技术获取关于水位的泊松方程。而湍流计算则采用二阶K-L模型求解。模型采用Gironde河口两次不同实测数据进行率定参数与验证。通过对潮汐与径流作用的详细分析以研究该河口动力结构及影响河口环流盐水入侵的主要影响因素。
Study on estuarine circulation and saline intrusion at Gironde estuary using a three-dimensional numerical model of computable estuary flow field. In this model, the shallow water equation is solved by the finite difference method, and the Poisson equation about the water level is acquired by the mode splitting technique. Turbulence calculations use second-order K-L models. Two different measured data of Gironde estuary were used in the model to conduct rate determination and verification. Through the detailed analysis of tidal and runoff effects, the paper studies the dynamic structure of the estuary and the main influencing factors of estuarine salt water intrusion.