较陡坡试验平均沿岸流速度分布拟合

Curve fitting of mean longshore current velocity distribution for steep slope experiment

平均沿岸流分布对海岸流量和泥沙输移有重要影响。为了更深刻地研究平均沿岸流的分布特征,尤其是较陡坡条件下不同于缓坡情况下的分布特征,在1∶40较陡坡度平均沿岸流试验的基础上,探寻不同于Allen分布、适合较陡坡情况下的平均沿岸流分布拟合曲线。结果表明,通过自定义分段函数和约束条件可以较好地拟合较陡坡情况下的平均沿岸流海岸一侧呈上凸趋势的分布特征。

The mean longshore current distribution has a significant impact on coastal discharge and sediment transport.In order to study the distribution characteristics of mean longshore current more deeply,especially under steep slopes rather than mild slopes,base on the 1 40 steeper-slope mean longshore current experiment,this paper searches for the curve fitting of mean longshore current distribution,which is different from Allen distribution and suitable for steep slopes.The results show that using the self-defined piecewise function and the appropriate constraints can better fit the distribution characteristics that the coastal side of the mean longshore current distribution shows a convex trend under steep slopes.