Investigations of continuous bed load saltating process

Citation
Hy. Lee et al., Investigations of continuous bed load saltating process, J HYDR ENG, 126(9), 2000, pp. 691-700
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF HYDRAULIC ENGINEERING-ASCE
ISSN journal
0733-9429 → ACNP
Volume
126
Issue
9
Year of publication
2000
Pages
691 - 700
Database
ISI
SICI code
0733-9429(200009)126:9<691:IOCBLS>2.0.ZU;2-K
Abstract
Particle saltating motions during bed load transport are dominated by the f orces acting upon particles and the random process of the particles impacti ng on and rebounding from the channel bed. A real-time flow visualization t echnique is developed in this study to measure particle saltating trajector ies, corresponding velocities, and impacting and rebounding angles. Based o n the experimental data, regression equations for the dimensionless saltati ng length, height, and velocity were obtained. A numerical model that is ab le to simulate the continuous saltating process of a single particle was de veloped. The model was calibrated and verified with the experimental data, and the results were satisfactory. The model was also used to generate a se ries of synthetic data. Based on these data and the flume data collected by previous investigators, a bed load equation was derived.