Author(s): Khairul Rahmah Ayub, Aminuddin Ab. Ghani, Nor Azazi Zakaria
Linked Author(s): Khairul Rahmah Ayub
Keywords: Intensive green roof, runoff quality, stormwater management, sustainable urban drainage systems (SUDS), thermal
Abstract: Sustainable Urban Drainage Systems (SUDS) promoting numerous types of facilities in stormwater management. The facilities fall in three major group functions namely source control, site control and regional control. Control at source facilities like green roofs, permeable surface and so forth are purposely built to manage rainfall close to where it falls. Benefits of green roof around the globe are very noticeable. This paper will discuss the performance of green roof during El-Nino period and runoff water quality from high intensity rainfall. Intensive green roof is constructed on the top of car parking roof. It was observe daily for one year. Results found that green roof's contribution in cooling the indoor area of car park in tropical climate region varies during El-Nino period. Its performance relies to the surrounding temperature which during El-Nino, it can increase the surrounding temperature in the range 0. 5oC to 2. 0oC compared to normal period. However, during normal climate, green roof manage to reduce indoor area temperature in the range of 0. 2oC to 2. 0oC. This study show the green roof manages to perform very well in delaying the outflow during high intensity rainfall. It can retain 100% of rain water or up to 6 months ARI event. However, it depends on the frequency of the events. In term of improving the rain water quality, vegetation used did not gave significance difference in improving runoff water quality. Nonetheless the parameters studied still did not permit according to the National River Water Quality Standard for Malaysia and Malaysia Drinking Water Quality Standard (Raw Water). This study concluded that application of green roof in urban infrastructure like parking areas and bus stops is very promising method for tropical climate countries
Year: 2017