粉沙质海岸的泥沙运动和外航道淤积

Sand movement of silt-sandy beach and the outer navigation siltation

文章分析了粉沙质海岸泥沙运动特性和粉沙质海岸外航道泥沙淤积特点,针对粉沙质海岸存在的悬移质、推移质和近底流移质3种泥沙运移形态,提出了计算粉沙质海岸外航道淤积的三层模式,并推导了临底流移质淤积计算的实用公式,进而建立了适用于粉沙质海岸外航道淤积的实用公式,并以黄骅港实测资料为依据,计算了黄骅港曾出现的大风淤积,并与实测结果进行对比,结果显示趋势一致、量级吻合,公式可推广应用。

In this paper, the sediment movement characteristics of silt - sandy beach and features of the outer navigation siltation are analyzed. Aiming at the three movement forms of suspended sediment, flow load and bed load in silt - sandy beach, the three - layer mode for the outer navigation siltation calculation is put forward, and the practical formula for calculating siltation of flow load close to sea floor is deduced, then the practical formula applying to the outer navigation siltation of silt - sandy beach is established. According to the on - scene actual measurement data, strong windy siltation which happened in Huanghua is calculated and compared with the on - scene measurement data. The result shows the tendency is unanimous and the grade coincides. The formula can be popularized and used.