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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Interactional erosion process of barriers dams by over-topping flood
Interactional erosion process of barriers dams by over-topping flood
Author : RUI MA (1), RUNZE MIAO (2), HONGWU ZHANG (3) &DEYU ZHONG (4)
article focuses on the erosion process and mechanism of dam breaking under
the alternating action of hydraulic scour and gravitational erosion. The dam overtopping experiments under different
conditions within a flume were conducted ,including four influential factors: the dam height, dam slope, storage capacity and
dam material, to observe and analyze the dam-break flow, the amount of dam erosion, interactional mechanism of vertical
incised scouring process, transverse broadening process and retrogressive erosion process. Four synchronized high-speed
cameras were used to record the profiles of the dam body and the transient stages of the water surface. A conclusion is
drawn as follows: the dam height, dam slope, storage capacity, and the amount of silver sand are positively related to the
maximum peak discharge and are negative to the peak time; the four factors have collaborative influence on the erosion
ability, erosion duration and washing range of the flow, and can further influence the erosion processes and erosion rates in
three directions; the collapse of slope and ‘scarp’ retrocession can lead to periodic variation of the erosion volume of
retrogressive process in the flushing process.Form Required :Published Date : 123
File Size : 3,182,144 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 27/08/2015
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