Fractionwise calculation of bed load transport

Fractional bed load transport model for nonuniform unimodal and bimodal sediments

“…Starting from the pioneering work of Du Boys (1879), many investigators proposed relationships for computation of bed load transport of uniform sediments, like Meyer-Peter and Muller (1948), Yalin (1963), Ackers and White (1973), Misri et al (1984), Samaga et al (1986) etc. Apart from the bed load transport relationships for uniform sediments, several relationships (Ashida and Michiue, 1971;Parker et al, 1982;Diplas, 1987;Bridge and Bennett, 1992;Patel and Ranga Raju, 1996;Wu et al, 2000;Wilcock and Crowe, 2003;Almedeij et al, 2006;Recking, 2010) were also proposed in the past for computation of bed load transport rates of nonuniform sediments in terms of fluid, flow and sediment characteristics.…”

“…Parker et al (1982), Diplas (1987), Patel and Ranga Raju (1996) and Wu et al (2000); were primarily developed from the data of unimodal and weakly bimodal sediments; and their performance is still required to be verified for bimodal sediments. The present study has been planned to verify the performance of existing methods for fractional bed load transport of bimodal sediments, and develop a new relationship, based on fractional critical shear stress of bulk grain size distributions of unimodal and bimodal sediments.…”

“…Parker et al (1982) suggested the use of sub-pavement grain size distribution for computation of bed load transport rates as, in long term; it resembles the grain size distribution of transported bed load in natural rivers. Patel and Ranga Raju (1996) assessed the performance of Ashida and Michiue (1971), Proffitt and Sutherland (1983), Mittal et al (1990) and Bridge and Bennett (1992) methods for prediction of fractional bed load transport of extremely nonuniform sediments. Keeping in view inadequate performance of the methods, they developed their own relationship for fractional bed load transport of nonuniform sediments using critical shear stress of arithmetic mean size, computed as per Shields (1936), as one of the scaling parameters.…”

Stochastic and Deterministic Methods of Computing Graded Bedload Transport

“…A finite lower and upper bound of the above integration is chosen such that most of the distribution is covered (e.g., 6  ). Patel and Raju (1996) modified the previous work by Misri et al (1984)  by cubic spline.…”

Prediction of Total Load Transport of an Indian Alluvial River to Estimate Unmeasured Bed Load through an Alternative Approach

“…Several researchers have developed models for finding uniform and non-uniform bed load transport rate [2][3][4][5][6][7][8] . Several bed load models have been developed for computing the fractional transport rate of non-uniform bed load [9][10][11][12][13][14][15] . Applicability of these models is mainly for sand bed rivers.…”