Investigation of Scouring Downstream of Transverse Weirs in Arc 90

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Sargholi R.; Bordbar A.; Asareh A.; Heidarnejad M.

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ISSN: 2588-4824

Journal Paper

Paper Information

Journal: Journal of Water and Soil Science Year:2024 | Volume: | Issue: Page(s): 35-49

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Title

Investigation of Scouring Downstream of Transverse Weirs in Arc 90

Author(s)

Sargholi R. | Bordbar A. | Asareh A. | Heidarnejad M. | Issue Writer Certificate

Keywords

Bridge abutmentQ4

Physical modelQ4

ScourQ4

90-degree arcQ4

Abstract

In the past, various methods have been proposed to control beach heel Scouring. For shallow rivers (such as mountain rivers), various types of overflows are used. Therefore, the development of Scour in cross-vane and w-weir structures for coastal protection was investigated in this study. The results showed that by installing a w-weir structure in a 90-degree position compared to a 30 and 60-degree position, a 37. 9% and 19. 7% reduction of Scouring was observed, respectively. Also, by installing the cross vane structure in the 90-degree position compared to the 30 and 60-degree position, a 35. 4% and 21. 2% reduction of Scouring was observed, respectively. With increasing width (L / B) (ratio of the width of structure to the width of flume), the w-weir structure decreased from 1. 5 to 2, Scour rate of 7. 9%. Also, with increasing width (L / B) (ratio of the width of structure to the width of flume), the cross-vane structure has decreased from 1. 3 to 1. 7, and the Scour rate has decreased by 4. 7%. The w-weir structure had an average of 7. 3% less Scouring than the cross-vane structure.

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