An investigation into the effectiveness of bioretention cells (BCs) under potential climatic changes was conducted using representative concentration pathways. A case study of Guangzhou showed changes in peak runoff in climate change scenarios, with obvious growth in RCP8.5 and slight growth in RCP2.6. The performance of BCs on multiple parameters, including reduction of runoff volume, peak runoff, and first flush, were examined in different design storms using a hydrology model (SWMM). The effectiveness of BCs varied non-linearly with scale. Their performance fell by varying amounts in the various scenarios. BCs could provide sufficient effects in response to short-return-period and short-duration storms, but the performance of BCs decreased with heavy storms, especially considering climate change. Hence, BCs cannot replace grey infrastructure but should be integrated with them. The method developed in this study could be useful in the planning and design of low impact development in view of future climate changes.
1.Southeast Univ, Sch Architecture, Nanjing 210096, Jiangsu, Peoples R China 2.Guangzhou Univ, Coll Architecture & Urban Planning, Guangzhou 510006, Guangdong, Peoples R China 3.Biophil Lab, Z T Studio, Shanghai 200052, Peoples R China 4.Nanyang Technol Univ, Nanyang Environm & Water Res Inst, Singapore 637141, Singapore 5.Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Guangdong, Peoples R China 6.Univ New South Wales, Fac Built Environm, Sydney, NSW 2052, Australia 7.Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore
Recommended Citation:
Wang, Mo,Zhang, Dongqing,Lou, Siwei,et al. Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes[J]. WATER,2019-01-01,11(5)