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 8 - CLIMATE CHANGE AND HAZARD MITIGATION : Test Study on Overtopping Breaching Process of Earth Dam and Peak discharge
Test Study on Overtopping Breaching Process of Earth Dam and Peak discharge
Author : Duan Wengang, Zhang Hui and Yang Jinbo
In order to explore the relationship between peak discharge of earth dam and breaching process, a series of indoor flume experiments have been done on earth dam (1 meter height)constructed by wide gradation and cohesionless materials. Dam erosion process and hydraulic parameter changing process have been measured in the condition of flood overtopping. The result of the experiment indicates that depending on the way of the overtopping flow, the density of fill and gradation composition of the dam?s constructional material, the overtopping erosion process can be classified into 3 types such as layer-by-layer erosion, entire overtopping erosion and headcut erosion. There is a very close relationship between the peak discharge and the breaching process. The quicker of dam-break happens, the bigger the peak discharge is. In the same situation, the peak discharge of headcut erosion increases 40% to the one of layer-by-layer erosion.
File Size : 602,420 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 19/07/2016
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