Evaluation and Improvement of Bed Load Discharge Formulas based on Helley–Smith Sampling in an Alpine Gravel Bed River
- 1 May 2002
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Hydraulic Engineering
- Vol. 128 (5), 484-499
- https://doi.org/10.1061/(asce)0733-9429(2002)128:5(484)
Abstract
Bed load discharge formulas have been evaluated by analyzing them in relation to measured Helley–Smith data for the gravel-bedded armored Drau River, Austria. Comparison of calculations with measurements leads to ranking of the formulas that depends on the evaluation parameters. The choice of formula is made with respect to our specific aims: the investigation of individual floods requires a different approach from that of long-term budgets. Formula performance is consistently improved when conditions for the threshold of motion are modified according to data measured up on the initiation of motion. Formulas such as those reported by Parker in 1990, Zanke in 1999, and Sun and Donahue in 2000 are capable of coping with partial transport, which is commonly found in Alpine rivers. These formulas therefore provide encouraging results, particularly after the introduction of modifications. The augmentation of field measurements, even if limited in scope, considerably improves the performance of bed load discharge formulas.Keywords
This publication has 25 references indexed in Scilit:
- Statistically Derived Bedload Formula for Any Fraction of Nonuniform SedimentJournal of Hydraulic Engineering, 2000
- Turbulence and Secondary Flow over Sediment Stripes in Weakly Bimodal Bed MaterialJournal of Hydraulic Engineering, 1999
- Partial transport of a sand/gravel sedimentWater Resources Research, 1997
- The components of fractional transport rateWater Resources Research, 1997
- Selection of Gravel‐Transport Formula for Stream ModelingJournal of Hydraulic Engineering, 1994
- Critical Shear Stress of Natural SedimentsJournal of Hydraulic Engineering, 1993
- The variability of critical shear stress, friction angle, and grain protrusion in water‐worked sedimentsSedimentology, 1990
- Surface-based bedload transport relation for gravel riversJournal of Hydraulic Research, 1990
- An assessment of bed load sediment transport formulae for gravel bed riversWater Resources Research, 1989
- An empirical correlation of bedload transport rates in flumes and natural riversProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1980