莺歌咀附近岸段沿岸输沙率的计算与分析

Calculation and analysis of longshore sediment transport rate of beach near Yingge Tsui

作为评估海岸工程设计是否合理的理论依据之一,沿岸输沙率的计算与分析必不可少。在沿岸输沙波浪要素计算时,采用波向线法,并进一步考虑流和潮位对折射系数的影响,得到较为准确的波浪要素。根据得到的波浪要素,采用波能流法计算沿岸输沙率,用实测资料进行验证,并与已有结果进行比较,具有较好的一致性。将该数值计算方法应用于莺歌咀附近岸段沿岸输沙率的计算,对工程区域的泥沙运动规律进行预测和分析。

As one of the theoretical basis to assess the reasonableness of coastal engineering design,it is essential to calculate and analyze the longshore sediment transport rate.In this paper,wave direction line numerical method was used to calculate wave propagation,and the flow and tidal influence on the refractive index was taken into further consideration to get more accurate wave elements.According to the obtained wave elements,then wave energy flow method was used to calculate the longshore sediment transport rate.It was validated with field data and compared with existing results,showed good agreement.Then it was uesd to calculated the longshore sediment transport rate of beach near the Yingge Tsui and helped to predict the sediment motion og the project area.