WT5”BZ]Several typical formulas for bed load transport are examined based on field data in this paper. It is concluded that, the Einstein formula provides good estimates for the bed load transport rate while other ones predict much lower transport rates. The main reason for the under-prediction is that D p, the effective diameter of particles, is too large as a representative diameter of the bed material for gravel streams with partially movable bed. Performance of these formulas can be significantly improved if D 35  is adopted instead of D p. [WT5”HZ] WT5 “BZ] Several typical formulas for bed load transport are examined based on field data in this paper. It is said that that the Einstein formula provides good estimates for the bed load transport rate while other ones for the under-prediction is that D p, the effective diameter of particles, is too large as a representative diameter of the bed material for gravel streams with partially movable bed. Performance of these formulas can be significantly improved if D 35  is adopted instead of  D p. [WT5 ”HZ]