中文摘要：

运用Chang的S型弯道断面流速分布和中性物质浓度分布,及实际河道的河床冲淤对修正后平面二维水流运动方程和悬移质不平衡输沙方程进行验证,并与修正前的模型进行比较。模拟结果发现修正后模型计算结果较修正前模型计算结果与实测值符合更好。表明二次流项及横向输沙项的加入能更有效地模拟出弯道处的环流水力特性及横向输沙特性。

英文摘要：

Flow simulation and neutral substance transport of the 2D model presented in Part 1 is calibrated and verified by using Chang（ 1971）＇s experimental data of S-shaped bend. Field data of Yichang reach from Gezhouba dam to Huyatan are adopted to verify sediment transportation and river bed erosion and deposition. Results show that if secondary flow effect and transverse sediment transport are modeled, then the calculations agree well with the measurements. Dispersion stresses are important in transverse momentum convection that causes the flow and sediment to move toward the outer bank.