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 : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Evolution of maximum scour depth downstream of a grade-control structure during a flood
Evolution of maximum scour depth downstream of a grade-control structure during a flood
Author : Jian-Hao Hong1, Jau-Yau Lu2, Kai-Po Chang1, Chih-Chiang Su1
For many incised channels, one of the most commonly accepted remedial strategies is to install some hard structures such as grade-control structures (GCSs) in the riverbed to resist further incision. However, the GCSs may collapse during floods. In this context, the studies on temporal variation of scour depth at GCSs due to floods are still limited. Hence, in this study, the effect of the flood hydrograph on the scour downstream of grade-control structures without upstream sediment supply was investigated experimentally. In addition, based on the dimensional analysis and the concept of superposition, a methodology is proposed to simulate the time evolution of maximum scour depth downstream of a GCS. The proposed scheme predicts the temporal variations of maximum scour depth under unsteady flow conditions reasonably well.
File Size : 315,799 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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