Reducing Sediment Deposition on Deflector in Vortex Settling Basins
Publication: Journal of Irrigation and Drainage Engineering
Volume 146, Issue 10
Abstract
This paper presents a retrofit for vortex settling basins (VSBs) by perforating the deflector to reduce sediment deposition and thereby lowering VSB failure risks. Experiments were conducted for two retrofitted VSBs with the deflector perforated on the outside overflow area only and the other entirely perforated. The sediment deposition, sediment trapping efficiency, and water abstraction ratio of the retrofitted VSBs were measured and compared with an original VSB with an unperforated deflector. The VSB with a partially perforated deflector exhibited a similar sediment trapping efficiency and water abstraction ratio to the original VSB, with an average reduction over 40% in sediment deposition on the deflector. The VSB with an entirely perforated deflector had a lower sediment trapping efficiency and greater sediment deposition on the deflector.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request (experimental measurements).
Acknowledgments
The writers gratefully acknowledge financial support from the Chinese Water Pollution Control Program (Project No. 2017ZX07206-001-02-001), the University Research Project of Xinjiang Uygur Autonomous Region (Grant No. XJEDU2018I010), and Tianshan Youth Project (2018Q017).
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Published In
Journal of Irrigation and Drainage Engineering
Volume 146 • Issue 10 • October 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Dec 9, 2019
Accepted: Jun 18, 2020
Published online: Aug 14, 2020
Published in print: Oct 1, 2020
Discussion open until: Jan 14, 2021
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