THE THEORETICAL ANALYSIS OF POLLUTANT DISPERSION IN TIDAL FLOW AND ITS APPLICATION
潮流中污染物离散的理论分析与应用

In this paper a formula is derived for shear dispersion coefficients of two dimensional tidal flow, the velocity distributions of which can be expressed by the product of a space-dependent function and a time-dependent function, by the method of concen-trational moment. The process of dispersion coefficients versus time is calculated in case of sine tidal flow with logarithmic velocity distribution. The relation of dispersion and features of tidal flow, and the phenomenon of negative dispersion are analyzed. Finaly, the theoretical formula is applied to calculate the dispersion coefficients of Huangpu reach in Zhujiang river, the calculating results are in good agreement with field measurements.