Vegetation Effect on Shear stress and Bed-load Transport in a Gradually Varied Flows
Publish place: 09th International River Engineering Conference
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
IREC09_030
تاریخ نمایه سازی: 19 اسفند 1391
Abstract:
Vegetation is an important factor in river geomorphology due to its effects on bed and bank erosion and sediment transportation. In this study 38 series of steady, gradually varied flow experiments were performed in a rectangular rigid boundary flume. Two types of flow, i.e. with and without sediment were used to investigate the impact of un-submerged rigid vegetation-like elements on the flow conditions. The results show that the presence of un-submerged rigid vegetation increases the resistance to flow and the total shear stress. Also the results prove that the measured bed-load transport data are very close to the results obtained from the Ashida & Michiue’s bed-load transport equation
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Authors
Elham Vahidi
University of Tehran, Karaj, Iran
Mohammad Hossein Omid
Professor, Department of Irrigation & Reclamation Engineering, University of Tehran, Karaj, Iran.
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