Title: SwinOSD: a computer tool for designing onsite detention basin

Authors: Monzur A. Imteaz; Iqbal Hossain; Amimul Ahsan; Abdallah Shanableh

Addresses: Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne, VIC 3122, Australia ' Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne, VIC 3122, Australia ' Department of Civil and Environmental Engineering, Faculty of Engineering and Technology, Islamic University of Technology (IUT), Gazipur, Bangladesh ' Research Institute of Sciences and Engineering, University of Sharjah, 27272 Sharjah, UAE

Abstract: A computer tool was developed to calculate sizing requirements of onsite detention (OSD) basins. The tool reads design rainfall and temporal pattern from pre-populated spreadsheets, which are linked with the tool. The tool calculates OSD storage required from the calculated runoff time-series (for a particular time period) and user-provided permissible site discharge (PSD). The tool also calculates maximum storage required considering worst temporal pattern of rainfall for a conservative design. It also calculates average storage volume required taking averages of calculated storages based on all the temporal patterns. Eventually, for a selected water height, the tool calculates required orifice diameter to maintain a given PSD. The tool calculated storage requirements were compared with the widely used urban drainage model, DRAINS. For all the selected scenarios, the DRAINS simulated storage-depth curves show that the developed tool calculated results are compatible with DRAINS calculations under the same scenario.

Keywords: Australian Rainfall & Runoff; ARR; onsite detention; OSD; permissible site discharge; PSD; design rainfall; DRAINS.

DOI: 10.1504/IJHST.2021.114547

International Journal of Hydrology Science and Technology, 2021 Vol.11 No.3, pp.269 - 281

Received: 10 Nov 2018
Accepted: 25 Jul 2019
Published online: 27 Apr 2021 *

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