Based on dimensional analysis principle,the influence on the bed load transport rate had been discussed by several hydraulic elements and boundary conditions. The dimensionless comprehensive flow intensity index,reflecting river bed form factor,had been established,and rela-tionship between flow intensity and bed load transport intensity had been analyzed. Analysis shows that both dimensionless comprehensive flow shear stress index and flow power index have a better correlation with the dimensionless bed load transport intensity. When the flow strength is low,di-mensionless composite flow power index W*1 <600,the relevance between flow power index and bed load transport intensity have some fluctuating. When the flow strength is increase,dimensionless composite flow power index 600展开▼
