Erosion characteristics of a medium sand breached embankment

Erosion characteristics of a medium sand breached embankment. Malaysian Journal of Civil Engineering, 29 (1). pp. 100-117. ISSN 1823-7843 (2017)


Embankment breaching dam studies have been carried out since 1980s and researchers who carried out physical experiments have contributed the understanding in the breaching process. This includes lacking in data and understanding in upgrading the breach models. Therefore, this study is to analyse erosion characteristics of a medium sand of embankment breaching due to overtopping and to produce the breached outflow hydrographs for different inflow rates. Parameters such as sediment sizes, embankment slope and inflow rates were applied to examine the effects of breach parameters towards the breaching process. Experimental works on the breaching embankment were conducted to collect data needed and a dimensional analysis was proposed to get relationship of the dominant parameters that affect the failure of the embankment. The result obtained was presented in hydrographs analysis and a combination of dimensionless group of breached erosion. The finding concluded that the finer sediment produces higher peak outflow compared to a medium sediment size and controlling parameters such as particle diameter, d50, velocity, ub, and water density, ρw are the significant parameters that affect the process of embankment breached. It also observed that the velocity after the breaching process increases once the water flow through an embankment dam and it started to decrease after passing through the middle of embankment due to the large surface area.

Item Type: Article
Keywords: Breaching process, Breach outflow hydrograph, Sediment size, Medium size of sediment, Breach erosion
Taxonomy: By Subject > College of Engineering > Civil Engineering > Geotechnical and Transportation
By Subject > College of Engineering > Civil Engineering > Water Resources and Environment
Local Content Hub: Subjects > College of Engineering
Depositing User: Eza Eliana Abdul Wahid
Date Deposited: 23 Nov 2022 03:32
Last Modified: 23 Nov 2022 03:32
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