摘要
本文建立了模拟黄河下游冬季输沙及河床变化的数学模型。根据实测资料对明流(不结冰)情况下的经验输沙公式进行了修正以用于冰盖水流的情况。在本模型中计算了模拟河段内各个断面在每个时段的水流条件、输沙率及河床的断面形态。在河床演变过程中根据河流最小能耗原理对河宽的变化进行了调整。冲淤沿断面的横向分布是根据有效拖曳力的原则分配的。模拟结果与实测资料相当吻合。
A mathematical model is developed for simulating sediment transport and bed changes in the Lower Yellow River during the winter. The empirical sediment transport formula commonly used for open water conditions is modified for ice covered conditions based on field data. In the simulation model, temporal and spatial changes of flow, sediment transport rate, and channel bed profile are calculated at successive time steps and cross sections. Changes in channel width are calculated based on the minimum stream power concept. The distribution of erosion and deposition at a cross-section is determined by the effective tractive force criterion. The simulation results compared favorably with field observar tions.
出处
《泥沙研究》
CSCD
北大核心
1993年第3期36-43,共8页
Journal of Sediment Research
