Modelling of Grassed Road Divider as Bio-Retention System for Urban Road Drainage

Authors

  • Yau Seng Mah Department of Civil Engineering, Faculty of Engineering, Universiti Malaysia Sarawak
  • Amy Ee Ling Wong Department of Civil Engineering, Faculty of Engineering, Universiti Malaysia Sarawak
  • Fang Yenn Teo Faculty of Engineering, Nottingham University Malaysia

DOI:

https://doi.org/10.33736/jaspe.909.2018

Keywords:

Infiltration, Rain garden, Road, Runoff, Stormwater, Urban

Abstract

An evaluation on the applicability of bio-retention system in grassed road divider under high rainfall of equatorial region was conducted by developing computer-aided stormwater models using USEPA SWMM 5.1. The models simulated road runoffs with and without bio-retention systems. A single unit of bio-retention system tested here was 3 m in width, 6 m in length with 150 mm of ponding depth and 600 mm of soil/storage depth. Results indicated that soil types of loamy sand, sandy loam and loam showed similar performance in reducing runoff. With installation of bio-retention system, road runoff could be reduced 40-50% when subjected to 60 minutes of 2-, 5- and 10-year ARI rain events. The results obtained from the simulation were encouraging that bio-retention system in grassed road divider could function to augment the existing urban road drainage.

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Published

2018-09-30

How to Cite

Mah, Y. S., Wong, A. E. L., & Teo, F. Y. (2018). Modelling of Grassed Road Divider as Bio-Retention System for Urban Road Drainage. Journal of Applied Science &Amp; Process Engineering, 5(2), 266–276. https://doi.org/10.33736/jaspe.909.2018