泥沙级配对水流挟沙力计算的影响

Effect of Sand Graduation on Sand Carrying Capacity of Flow

通过对大量水槽试验资料的分析，认为在水流挟沙力计算公式中应该考虑反映泥沙级配影响的因子Ｄ２５０／（Ｄ２５Ｄ７５），并由此推导了新的水流挟沙力计算公式．利用水槽试验资料及黄河下游实测资料对该公式进行了验证，验证结果表明，泥沙级配因子Ｄ２５０／（Ｄ２５Ｄ７５）能提高水流挟沙力的计算精度．

Through analysing a great deal of flume experiment data,the sand graduation element D 2 50 D 25 D 75 was regarded as an important element in the computation of the sand carrying capacity of flow,and a new formula of sand carrying capacity was derived.As a result of the computation of the flume experiment data and the measurement data from the downstream of the Yellow River,it was expressed that the computation of the sand carrying capacity of flow could be improved by considering the sand graduation element D 2 50 D 25 D 75 .