汕头湾悬移质石英含量与含沙量的关系及显损含沙量年出现率推算

Relationship between quartz component and sediment concentration and calculation on the year occurrence number of wearing sediment concentration in Shantou Bay

根据广东汕头湾泥沙实测资料的分析 ,石英百分含量随含沙量增大而减小 ,绝对含量却随含沙量增大而增加 ,并与含沙量有很好的相关关系 ,原因是随着含沙量的增大 ,细颗粒泥沙的含量增加较快 ,其使悬沙的平均粒径减小 ,而粗颗粒泥沙的百分含量变化正好相反。通过建立石英含量与含沙量和水位上涨率 (或下降率 )与含沙量之间的相关关系式 ,本文就汕头湾显损含沙量的年出现率及含沙量和石英含量的特征值进行了推算。

Based on the analysis of measured data in Shantou Bay, Guangdong province, there is a good interrelation between quartz component and suspended sediment concentration. With the increasing of suspended sediment concentration, the percentage of quartz decreases, while the amount of quartz material increases. The reason for this phenomenon is the number of fine grain size sediment goes up quickly with sediment concentration increasing, which reduces the median grain size of suspended sediment. By setting up relational expressions of quartz to sediment conncentration and the rising rate and descending rate of water level to sediment concentration, the year occurrence number of wearing sediment concentration and characteristic values of quartz and suspended sediment concentration are calculated.