Meyer-Peter and Mueller
: Developed from experiments on gravel-bed flumes. This equation is a Strickler-type equation and is subject to the same limitations. In addition, the coefficient is also dependent upon the types and arrangement of roughness elements (Meyer-Peter and Muller, 1948).
Meyer-Peter, E., and Muller, R., 1948, Formulas for bed-load transport;Proceedings of the International Association for Hydraulic Research, ThirdAnnual Conference, Stockholm, Sweden, pp, 39-64.