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http://dx.doi.org/10.3741/JKWRA.2010.43.10.921

Numerical Modelling of the Adjustment Processes of Minning Pit in the Dredged Channels  

Jang, Chang-Lae (Department of Civil Engineering, Chungju National University)
Publication Information
Journal of Korea Water Resources Association / v.43, no.10, 2010 , pp. 921-932 More about this Journal
Abstract
In this study, the adjustment processes of the disturbed channels by sand or gravel mining were investigated by a two dimensional numerical model in the generalized coordinate system. As a numerical scheme, the CIP (cubic interpolated pseudoparticle method) method was used to calculate the advection term in the flow field and central difference method was used to the diffusion term in it. The pit of the channel was partially filled with sediment at the toe of the pit upstream. As time increased, the headcut erosion upstream in the pit was decreased due to the sediment inflow. The almost inflow sediment upstream was trapped into the pit and the sediment deposit wedge migrated downstream in the pit with the steep submerged angle of repose. The numerical model was reproduced well the evolution processes of the channel. The mining pit migrated with speed as the channel was steep, and the numerical results were in overall agreement with the experimental results.
Keywords
numerical modelling; sediment mining pit; bed change; adjustment processes of the channels;
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Times Cited By KSCI : 1  (Citation Analysis)
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