近岸海域流速与含沙量垂线分布分析

Analysis on vertical distribution of nearshore fluid velocity and sediment concentration

根据日照、舟山等近岸海域实测流速与含沙量资料,对流速采用构造的方式得到结构简单、适用于工程计算的流速垂线分布规律;基于工程应用的便利性原则,采用理论分析方法改进了Van Rijn含沙量垂向分布公式,并利用实测资料对其进行验证。验证结果表明,推导得到的流速垂线分布公式和改进的含沙量垂向分布公式与实测资料吻合程度较好,能够客观反映流速垂线和含沙量垂线分布基本规律。

Based on the data, including the measured flow velocity and sediment concentration, in the nearshore areas of Rizhao and Zhoushan, velocity profile rule is gotten by the way of formation, which has simple structure and is suitable for engineering calculation. With the method of theoretic analysis, Van Rijn formula is modified and a new continuous sediment concentration profile is produced. The result of testing by use of measured data shows that both the derived velocity profile formula and the improved sediment concentration profile formula agree well with the measured flow velocity and sediment concentration, which reasonably reflects the basic principles of vertical distribution of fluid flow velocity and sediment concentration.