【摘要】 钱塘江河口存在广阔的潮滩地。本文将主槽与边滩的含沙量分开计算,然后再考虑它们之间的横向交换。含沙量的基本方程与文献[2]相同,但底部含沙量与垂线平均含沙量的比值不等于相应的挟沙能力的比值。含沙量的比值可以用一个简化模型的数值计算得到,并用实测资料进行了验证。潮流挟沙能力公式可以用实测的含沙量资料用统计方法得到。对二个断面7个连续潮的主槽及边滩含沙量资料进行了验证,计算值与实测值的平均误差小于20％。更多还原

【Abstract】 There exist wide tidal fiats in Qiantang Estuary. In this article the computation of silt concentration in the mainstream and tidal fiats are treated separately, then the transverse exchange of sediment between them is also taken into account. The basic equation is similar to the reference[2], but the ratio of the bottom silt concentration to the vertical average concentration is unequal to the relevant ratio of silt carrying capacity. The ratio of silt concentration can be determined by the computational results of a simple model and checked by the field investigation. The formulae of the silt carrying capacity for the tidal flow might be obtained by statistical method using measured silt concentration directly. The verification of silt concentration has been oarried out with two sections both in mainstream and tidal fiats during seven successive tides. The average discrepancy between the caloulated value and the measured value is less than 20%.更多还原