通过水槽试验对不连续宽级配床沙的推移质输沙率进行试验研究。深入分析、探讨了不同水流强度及不同床沙组成对连续与不连续宽级配床沙输沙率的影响。在已有研究成果的基础上，构造了考虑床沙不均匀性的相对水流强度表达式，着重研究了相对水流强度与推移质输沙率函数的关系。利用试验资料对提出的表达式进行回归分析，确定了有关参数。最终确定的不连续宽级配床沙推移质输沙率计算表达式结构合理，能够反映出不连续宽级配床沙不均匀性对水流输沙的影响。

The calculation method for bedload transport rate is studied by flume experiment, through which the effect of different flow intensities and bed material compositions on the transport rate of continuous and discontinuous broadly-graded bedload is investigated. A formula of relative flow intensity in consideration of non-uniform sediment is set up and regression analysis is carried out by using the experiment data. The relationship between relative flow intensity and bedload transport rate is further analyzed. This formula is proved to be rational as it reflects the effect of non-uniform discontinuous broadly-graded bed material on sediment transportation.