Abstract
This study investigates the performance of a subsurface stormwater perforated pipe as a subsurface conveyance component in a laboratory flume at Physical Laboratory, River Engineering and Urban Drainage Research Centre (REDAC), Universiti Sains Malaysia. The Manning’s roughness coefficient (n) was measured at 9 points along the pipe to assess its relationship with the velocity, depth, and Froude number of simulated runoff flows. In this paper, a case study of Gate partially open for slope 1:500 with 10 cm water depth is investigated. The results show that flow in the perforated pipe was mostly turbulent, and the calculated flow discharges and velocities from the outlets were higher under the effects of the calculated Manning coefficients ranged from 0.009 to 0.011, and an inverse linear relationship between Manning’s n and flow velocity was observed. Higher values of Manning’s n reduced flow velocity in the pipe, indicating the potential for peak flow attenuation and better control of stormwater quantity in subsurface urban drainage.
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Acknowledgements
The authors express their gratitude to Ministry of Higher Education, Malaysia, under the Higher Institution Centre of Excellence (HICoE) for a research grant of 311. PREDAC.4403901 and Universiti Sains Malaysia for providing the facilities.
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Abdullah, J. et al. (2023). Flow Characteristics in Subsurface Storm Water Perforated Pipe for Drainage System Application. In: Sandu, A.V., Vizureanu, P., Abdullah, M.M.A.B., Nabialek, M., Ghazali, C.M.R., Sandu, I. (eds) Selected Papers from ICIR EUROINVENT - 2023. ICIR EUROINVENT 2023. Springer Proceedings in Materials, vol 38. Springer, Cham. https://doi.org/10.1007/978-3-031-45964-1_3
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