A New Model for Velocity Profiles in Estuarine Waters

作者：Ni Zhi-hui^*; Song Zhi-yao; Wu Li-chun

来源：China Ocean Engineering, 2010, 24(2): 255-264.

• estuary
• velocity profile
• linear superposition
• the least square method

Water motion in estuarine waters is the result of the action of various dynamic factors. Firstly, based on the hydrodynamic characteristics in estuarine waters, neglecting the nonlinear effects of various flow hydrodynamic factors, the logarithm velocity profile of tidal current and the cubic velocity profile of Hansen and Rattray (1965) made for linear super-position at a sense of first order, a new model for velocity profile in estuarine waters is established. Then, by introducing the least square method combination of enumeration, the velocity profile data of wind-driven current measured in the laboratory and that observed at the North and the South Branches of the Yangtze Estuary are verified and compared with other formulas, all with satisfactoly results. The results show that the new model not only considers the influences of various dynamic factors, such as tide, wind force, run-off and density pressure with high accuracy, but also provides reasonable boundary conditions on the bottom for hydrodynamics numerical simulation in estuarine waters. Thereby, the accuracy and credibility of numerical computation and prediction

• 出版日期2010
• 单位南京师范大学; 重庆第二师范学院; 重庆交通大学