Green roofs as best management practices for heat reduction and stormwater flow mitigation

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Green roofs or vegetated roofs have many benefits for the environment. As on-site detention storage can also it can improve runoff water quality as well as reduce stormwater flow. This paper analyses the difference between two surfaces and the effect of green roof on stormwater flow. An experimental green roof plot was created on a main building where a Portable Automatic Weather Station (MAWS) weather station was already set-up on the green roof since February 2006. Nearby concrete layer was selected as a control site which is equipped with Thermometer-Stevenson Screen. Hourly data were plotted on graph paper. The formula developed by Rongfu was used to estimate the total rainfall retained by the green roof. The result showed that the green roof can reduce ambient air temperature up to 1.6°C. By using the 9.8 mm total rainfall as the threshold for the green roof to permit outflow from the main inlets, the total volume of rainfall retained by the green roof catchment was calculated at about 52,632 m 3. This large amount of rainfall means that the green roof could reduce the stormwater as well as peak flow at the drainage in heavy rainfall events. This technique can be a good option to reduce ambient air temperature and flashflood in tropical urban areas like Kuala Lumpur.

Original languageEnglish
Pages (from-to)58-62
Number of pages5
JournalWorld Applied Sciences Journal
Volume13
Issue number13
Publication statusPublished - 2011

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best management practice
stormwater
roof
mitigation
rainfall
weather station
ambient air
air temperature
peak flow
outflow
urban area
catchment
drainage
runoff
water quality

Keywords

  • Best Management Practices
  • Concrete top
  • Green roof
  • Stormwater

ASJC Scopus subject areas

  • General

Cite this

Green roofs as best management practices for heat reduction and stormwater flow mitigation. / Shaharuddin, A.; Md. Hashim, Noorazuan; Mohd Jani, Yaakob.

In: World Applied Sciences Journal, Vol. 13, No. 13, 2011, p. 58-62.

Research output: Contribution to journalArticle

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