本文介绍了一个预测非均质回荡水流中纵向弥散速率的模型。此模型由表述整个断面的速度和盐度的数学表达式,以及其对纵向弥散系数的经典定义的应用所组成。为了研究支配纵向弥散的主要因素,我们对化了两年多时间在泰恩河口所收集的速度和盐度数据进行了分析.成果表明该模型能够直接模拟河口的弥散通量,也能应用于水质模型。 This article presents a model for predicting the longitudinal dispersion rate in an inhomogeneous oscillating water flow. This model consists of a mathematical expression that expresses the velocity and salinity of the entire section and its application to the classical definition of longitudinal dispersivity. In order to study the main factors that dominate vertical dispersion, we analyzed the velocity and salinity data collected over more than two years at the Tyne Estuary.The results show that the model can directly simulate the estuary diffuse flux and can also be applied to Water quality model.