University Of Tehran Press Pollution 2383-451X 2 4 2016 10 01 Challenges and developments of bioretention facilities in treating urban stormwater runoff; A review 489 508 58312 10.7508/pj.2016.04.010 EN Husna Takaijudin River Engineering and Urban Drainage Research Centre (REDAC), Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Penang, Malaysia Department of Civil Engineering, Faculty of Engineering, Universitiy Teknologi PETRONAS, 31750, Tronoh, Perak, Malaysi Aminuddin Ab Ghani River Engineering and Urban Drainage Research Centre (REDAC), Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Penang, Malaysia 0000-0002-8912-9569 Nor Azazi Zakaria River Engineering and Urban Drainage Research Centre (REDAC), Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Penang, Malaysia Journal Article 2016 06 22 Bioretention or rain garden is a preferable low impact development (LID) approach due to its characteristics which reflect natural water cycle processes. However, this system is still little understood and quite complicated in terms of design and implementation due to many technical considerations. Hence, this paper gives a review of the challenges and developments for the use of bioretention facilities to enhance its capabilities in attenuating peak flow and treating stormwater runoff particularly in urban areas. This paper reviews the main aspects of bioretention which are stormwater hydrologic, hydraulic and treatment performance. Some of the limitations during the implementation of this natural approach are highlighted in design configuration and the public perception towards this new approach. It is concluded that the bioretention approach is one of the sustainable solutions for stormwater management that can be applied either for individual systems or regional systems.  https://jpoll.ut.ac.ir/article_58312_6066c7b24cbdc7ca4f81a343f4e0fc87.pdf