Based on the digital mask technique, the distribution of sand area density and the sediment-transportrate in flow field were obtained.
采用图像处理的数字掩码技术，处理图像得到了沙粒在流场中的面密度以及单宽输沙率。
2
The formulas of velocity distribution, flow resistance and bed load transportrate are obtained, in which the flow and sediment movement are considered simultaneously.
本文还导得动平床情况下的流速分布公式、阻力公式和输沙率公式，使动床的水流运动和输沙过程得以联解。
3
The seabed erosion - accretion pattern is consistent with the situation of convergence or divergence of sedimenttransportrate.