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将确定性方法和随机性方法相结合,以单位时间内单颗粒泥沙的交换次数代替交换时间,基于颗粒受力平衡推导了推移质颗粒的平均运动速度。结合Bagnold水流功率和Einstein起动概率的基本概念,推导了一个推移质平衡输沙率公式。该公式的系数在临界起动时较小,但随水流强度的增加而增大,从而避免了诸如Meyer-Peter、Einstein、Bagnold、Yalin及Engelund等经典推移质公式难以兼顾低强度和高强度输沙率计算的问题。利用经典的推移质输沙率实测数据检验了本文公式,表明该公式具有较好的适用性。
By combining the deterministic method with the random method, the exchange times of single sediment in unit time are substituted for the exchange time, and the average velocity of pushen particles is deduced based on the force balance of the particles. Combined with the basic concepts of Bagnold flow power and Einstein starting probability, a push-bed equilibrium sediment transport rate formula is deduced. The coefficients of this formula are small at critical start but increase with increasing water flow intensity, thus avoiding the difficulty of combining low-intensity and high-intensity sand transport with classical pluton equations such as Meyer-Peter, Einstein, Bagnold, Yalin and Engelund Rate calculation problem. The classical formulas of sediment transport rate are used to test the formula, which shows that the formula has good applicability.