Determination of Surface Runoff Using Rational Method at Al-Sultan Abdullah Hospital, Universiti Teknologi MARA, Puncak Alam

Authors

  • Faridatul Akma Abdul Latif Landscape Architecture, School Town Planning & Landscape Architecture, Universiti Teknologi MARA, Kampus Puncak Alam, Selangor
  • Danial Iqmal Khairil Anwar Landscape Architecture, School Town Planning & Landscape Architecture, Universiti Teknologi MARA, Kampus Puncak Alam, Selangor
  • Masbiha Mat Isa Landscape Architecture, School Town Planning & Landscape Architecture, Universiti Teknologi MARA, Kampus Puncak Alam, Selangor
  • Salina Mohamed Ali Landscape Architecture, School Town Planning & Landscape Architecture, Universiti Teknologi MARA, Kampus Puncak Alam, Selangor
  • Mohd Ruzaini Che Zahari Faculty of Built Environment & Surveying, Universiti Teknologi Malaysia, 81110 Johor Bahru, Johor, Malaysia

DOI:

https://doi.org/10.24191/bej.v21i2.478

Keywords:

Surface runoff, rational method, stormwater management, impervious surface

Abstract

The Al-Sultan Abdullah Hospital development area dominates the ground surface with an impervious surface and few remaining green spaces. This could increase the surface runoff in the area. This study adopted a rational method to determine the amount of surface runoff discharge accumulating on the impervious surface in Al-Sultan Abdullah Hospital. This method considers the catchment area, rainfall intensity, and runoff coefficients. The parameter of rainfall intensity (I) uses the Mononobe formula. In contrast, the weightage average for the total rainfall coefficient (C) and the size of the catchment area (A) is derived from mapping land cover. The results reveal that the total runoff coefficient value is 0.74, meaning that seventy-four percent (74%) of the rainfall becomes surface runoff. The highest surface runoff discharge was on the third of December 2022, with 0.684 m³/s with a rainfall intensity of 17.73 mm/hr. In contrast, the lowest was on the ninth of November 2022 at 0.331 m³/s, with a rainfall intensity of 8.59 mm/hr. The results found that the type and size of land cover influence the runoff coefficient in the study area. The results of this study demonstrate that surface runoff discharge from the site study increased as the impervious surface area increased.

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Published

01-07-2024 — Updated on 06-08-2024

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How to Cite

Abdul Latif, F. A., Khairil Anwar, D. I. ., Mat Isa, M., Mohamed Ali, S. ., & Che Zahari, M. R. (2024). Determination of Surface Runoff Using Rational Method at Al-Sultan Abdullah Hospital, Universiti Teknologi MARA, Puncak Alam. Built Environment Journal, 21(2), 92–107. https://doi.org/10.24191/bej.v21i2.478 (Original work published July 1, 2024)