IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Experimental Study on Static Bed Armoring Process
Experimental Study on Static Bed Armoring Process
Author : Dong Chen and Li He
This study investigates the time evolution of a bed armoring process by conducting a flume study with mixed-size sand\gravel. Mixture of five size categories (0.23mm, 1mm, 3mm, 7mm, and 10mm) is well-mixed and carefully paved, setting an initial slope in the flume. Constant inflow is designed to be able to transport all but the coarsest particles (10mm in diameter) from the bed surface. No sediment is fed from upstream in the study, which results in a static armoring. Fractional transport rates as the armor layer develops are measured with time by sediment trapping method at the end of the flume. Coupled observations of flow and transport cast doubt on the traditional hypothesis of exposure and hiding factors which play a key role in modeling non-uniform sediment transport. New models are necessary to predict the anomalous dispersion of bed-load on a heterogeneous bed surface created by a static armor layer.
File Size : 223,881 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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