河口推移质水道冲淤计算公式

在珠江三角洲横门出海水道的整治工程研究中，引进了一种计算以推移质造床为主的水道冲刷深度的方法，针对推移质造床的水流、泥沙特点，将推移质看作接近床面运动的浓度较高的悬移质来处理，并引进一综合参数来校正将推移质作为悬移质近似处理时造成的与实际情况的差异，通过物理模型实验的实测值得率定该参数。研究结果表明，该计算方法较好地反映了推移质引起的冲淤情况，较为准确地计算和模拟了推移质河床的冲淤数量与冲淤过程。

Calculation Formula of Erosion and Deposition for Bed Load Waterways at Estuaries

In the research of regulation of the Hengmeng outfall waterway on the Pearl River Delta, a method is introduced for calculation of the erosion depth of the bed load waterway. According to the characteristics of current and sediment in bed load waterways at estuaries, this method takes bed load as suspended load with highly concentrated sediment moving closely to riverbed, and introduces a synthetic coefficient to correct errors caused by approximate treatment of bed load as suspended load. The synthetic coefficient is determined by physical model experiment data. The result shows that this calculation method successfully reflects the erosion and deposition caused by bed load, and gives accurate results concerning the amount and process of erosion and deposition on bed load riverbeds.