The relationship between bed-load transport rate and flow intensity was discussed.Armoring layer destruction experiments were carried out in natural channel with clear-water scour. The results showed that dimensionless transport rate strength,corresponding to the maximum bed-load transport rate,increases with flow intensity and the increasing speed is faster than the calculated results by Meyer-Peter formula,Bagnold formula,and Engelong formula. Using the same forms of Meyer-Peter formula,through regression the relationship between dimensionless transport rate strength,corresponding to the maximum bed-load transport rate,and flow intensity during the process of clear-water scour and armoring layer destruction was established.
