洋山港区域挟沙力公式研究*

利用基于能量平衡观点推导的挟沙力公式，考虑到洋山港海域涨落潮期间悬沙浓度存在一定差异，分别建立了 该区域涨潮时期及落潮时期挟沙力公式。利用计算底部通量切引力公式与挟沙力公式相等方法，估算了实测期间水体挟沙 力值，并以洋山港2003年10月实测的水沙资料进行率定。最后，采用洋山港2005年7月实测含沙量资料对公式计算结果进行 验证。验证结果表明，所建立的挟沙力公式具有较高精度，其计算的含沙量变化与洋山港实际情况较为符合。

On formula for suspended sediment carrying in Yangshan harbor

Considering the sediment difference during the flood tide and the ebb tide, two formula deduced from the viewpoint of energy balance, for suspended sediment carrying in the Yangshan harbor of each flood and ebb tide are established. The suspended sediment carrying is calculated from the equation that the formula evaluating the bottom sediment flux by shear stress equals the formula by suspended sediment carrying. The observed data at the Yangshan harbor in October of 2003 is taken to calibrate the coefficients of the formula for suspended sediment carrying. Finally, the formula is verified by the measured data of suspended sediment concentration in the Yangshan harbor in July of 2005. The result shows that the established formula for suspended sediment carrying in the Yangshan harbor has a high precision. The calculated sediment concentration is in agreement with the measured ones.