Effect of Sediment Density on the Bed Topography in a Channel Bend Using Numerical Modeling
| Autor: | Yaser Safarpoor, Mohammad Vaghefi, Seyed Shaker Hashemi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Dike
geography geography.geographical_feature_category 0208 environmental biotechnology General Engineering Sediment Numerical modeling ssiim model t-shaped spur dike channel bend sediment density relative curvature 02 engineering and technology Sedimentation 020801 environmental engineering lcsh:TA1-2040 Spur dike Geotechnical engineering lcsh:Engineering (General). Civil engineering (General) Geomorphology Channel (geography) Geology |
| Zdroj: | The Journal of Engineering Research, Vol 13, Iss 1, Pp 22-32 (2016) Scopus-Elsevier |
| ISSN: | 1726-6742 1726-6009 |
| DOI: | 10.24200/tjer.vol13iss1pp22-32 |
| Popis: | In this paper, the bed topography of a channel at a 90-degree bend was studied at the T-shaped spur dike installed at the middle of the outer bank. Numerical analyses were performed with the Sediment Simulation in Intakes with Multiblock Option (SSIIM) model. Three relative curvatures (R/B = 2, 3, and 4) related to the three sediment densities (P = 2.35, 2.5, and 2.65) were modeled in nine cases and the effects of sediment density on the bed scour patterns were studied. It was observed that the maximum amount of scour occurred near the head of the dike wing at the dike’s upstream, and the maximum amount of sedimentation occurred at the inner bank of the bend exit. By increasing the sediment density when R/B = 4, the maximum scour and sedimentation decreased to 27.41% and 46.15%, respectively. When R/B = 3, the maximum scour and sedimentation decreased to 25.93% and 23.91%, respectively. When R/B = 2, the maximum scour and sedimentation decreased to 25.98% and 10%, respectively. |
| Databáze: | OpenAIRE |
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