Evaluation of green roof as green technology for urban stormwater quantity and quality controls

• Main Authors: Kok K.H., Sidek L.M., Abidin M.R.Z., Basri H., Muda Z.C., Beddu S.
• Other Authors: 55812179300
• Format: Conference paper
• Published: Institute of Physics Publishing 2023
• Subjects: Malaysia; Climate change; Digital storage; Greenhouse gases; Information management; Maintenance; Quality control; Runoff; Storms; Tropics; Water quality; Assessment criteria; Environment friendly; Environmental needs; Extensive green roofs; Green roof systems; Rapid urbanizations; Storm-water managements; Stormwater quantity; building construction; climate change; concentration (composition); conference proceeding; ecohydrology; greenhouse gas; heat island; humid tropics; installation; pH; phosphate; quality control; roof; runoff; stormwater; sustainability; urbanization; water quality; Roofs
• Institution: Universiti Tenaga Nasional

Promoting green design, construction, reconstruction and operation of buildings has never been more critical than now due to the ever increasing greenhouse gas emissions and rapid urbanizations that are fuelling climate change more quickly. Driven by environmental needs, Green Building Index (GBI) was founded in Malaysia to drive initiative to lead the property industry towards becoming more environment-friendly. Green roof system is one of the assessment criteria of this rating system which is under category of sustainable site planning and management. An extensive green roof was constructed in Humid Tropics Center (HTC) Kuala Lumpur as one of the components for Stormwater Management Ecohydrology (SME) in order to obtain scientific data of the system. This paper evaluates the performance of extensive green roof at Humid Tropics Center with respect to urban heat island mitigation and stormwater quantity and quality controls. Findings indicate that there was a reduction of around 1.5�C for indoor temperature of the building after installation of green roof. Simulations showed that the peak discharge was reduced up to 24% relative to impervious brown roof. The results show an increment of pH and high concentration of phosphate for the runoff generated from the green roof and the runoff water quality ranged between class I and II under INWQS. � Published under licence by IOP Publishing Ltd.