西洋东大港水道流速垂线分布研究

Vertical distribution of current velocity in Dongdagang channel

对辐射沙洲海域东大港4#站位连续2个潮周期的流速测量资料进行了分析、研究,拟合给出了流速垂线分布关系,并根据实际测量资料确定了该站位6个水层的浑水水流尾流函数项表达式。这些表达式表明浑水水流尾流函数是相对深度和摩阻速度的函数。探讨分析了尾流函数的空间分布和潮周期过程。非恒定流的水流尾流函数项的准确表达,对于揭示含沙水流流速结构及水、沙相影响作用规律将起到启发和推动作用。

On the basis of the measured data of the two tidal periods at No. 4 station in the tidal channel called Dongdagang, the vertical distribution of current velocity is studied and the surveyed current velocity data are fitted to the relative depth. The vertical distribution relationship between velocity and relative depth is discovered. Based on the surveyed current velocity data, the remainder current functions of six water layers are calibrated by fitting method. The remainder current function term is the function of friction velocity and relative depth. The time processes and vertical distribution of the remainder current function are also discussed.