This page has only limited features, please log in for full access.
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.
Mo Wang; Dongqing Zhang; Siwei Lou; Qinghe Hou; Yijie Liu; Yuning Cheng; Jinda Qi; Soon Keat Tan. Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes. Water 2019, 11, 997 .
AMA StyleMo Wang, Dongqing Zhang, Siwei Lou, Qinghe Hou, Yijie Liu, Yuning Cheng, Jinda Qi, Soon Keat Tan. Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes. Water. 2019; 11 (5):997.
Chicago/Turabian StyleMo Wang; Dongqing Zhang; Siwei Lou; Qinghe Hou; Yijie Liu; Yuning Cheng; Jinda Qi; Soon Keat Tan. 2019. "Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes." Water 11, no. 5: 997.
The effectiveness of porous pavement (PP) and bio-retention cells (BCs) under the influence of potential climate change was investigated based on representative concentration pathways (RCPs). A case study of a test catchment in Guangzhou illustrated changes of peak runoff under various climate scenarios. There were distinct increases in runoff volume and peak discharge in response to RCP8.5 but only marginal increases in response to RCP2.6 (compared with present conditions). The performance of PP and BCs in terms of percentage reduction of runoff volume and peak discharge was examined for 1-, 10-, and 100-year return period and 1- and 6-h-duration storms under various climate scenarios. The effectiveness of PP and BCs varied non-linearly with the extent of PP and BCs adopted. In general, the fluctuation of hydrological performance of PP is greater than that of BCs in RCP2.6 and RCP8.5 (e.g., peak flow reductions range from −60% to 69% and from −22% to 9%, for 5% area of PP and BCs, respectively). And PP is more cost-effective for frequent storms using life cycle costing analysis. We find that PP and BCs could significantly reduce runoff volume and peak discharge in response to rainfall events with short return period, but not for heavy storms with longer return period.
Mo Wang; Dongqing Zhang; Yuning Cheng; Soon Keat Tan. Assessing performance of porous pavements and bioretention cells for stormwater management in response to probable climatic changes. Journal of Environmental Management 2019, 243, 157 -167.
AMA StyleMo Wang, Dongqing Zhang, Yuning Cheng, Soon Keat Tan. Assessing performance of porous pavements and bioretention cells for stormwater management in response to probable climatic changes. Journal of Environmental Management. 2019; 243 ():157-167.
Chicago/Turabian StyleMo Wang; Dongqing Zhang; Yuning Cheng; Soon Keat Tan. 2019. "Assessing performance of porous pavements and bioretention cells for stormwater management in response to probable climatic changes." Journal of Environmental Management 243, no. : 157-167.
A bioretention system is a low-impact and sustainable treatment facility for treating urban stormwater runoff. To meet or maintain a consistently satisfactory performance, especially in terms of increasing nitrogen removal efficiency, the introduction of a submerged (anoxic) zone (SZ) combined with a module-based carbon source (C) has been recommended. This study investigated the removal of nitrogen (N), phosphorus (P) and heavy metals with a retrofitted bioretention system. A significant (p < 0.05) removal enhancement of N as well as total phosphorus (TP) was observed, in the mesocosms with additions of exogenous carbon as opposed to those without such condition. However, even in the mesocosm with SZ alone (without exogenous C), TP removal showed significant enhancement. With regard to the effects of SZ depth on nutrient removal, the results showed that the removal of both N and P in module with a shallow SZ (200 mm) showed significant enhancement compared to that in module with a deep SZ (300 mm). Removal efficiencies greater than 93% were observed for all three heavy metals tested (Cu, Pb, and Zn) in all mesocosms, even in the bioretention module without an SZ or plants, and it indicated that adsorption by the filtration media itself is probably the most important removal mechanism. Only Cu (but not Pb or Zn) showed significantly enhanced removal in module with an SZ as compared to those without an SZ. Carbon source played a minor role in metal removal as no significant (p > 0.05) improvement was observed in module with C as compared to that without C. Based on these results, the incorporation of SZ with C in stormwater biofilters is recommended.
Mo Wang; Dongqing Zhang; Yong Li; Qinghe Hou; Yuying Yu; Jinda Qi; Weicong Fu; Jianwen Dong; Yuning Cheng. Effect of a Submerged Zone and Carbon Source on Nutrient and Metal Removal for Stormwater by Bioretention Cells. Water 2018, 10, 1629 .
AMA StyleMo Wang, Dongqing Zhang, Yong Li, Qinghe Hou, Yuying Yu, Jinda Qi, Weicong Fu, Jianwen Dong, Yuning Cheng. Effect of a Submerged Zone and Carbon Source on Nutrient and Metal Removal for Stormwater by Bioretention Cells. Water. 2018; 10 (11):1629.
Chicago/Turabian StyleMo Wang; Dongqing Zhang; Yong Li; Qinghe Hou; Yuying Yu; Jinda Qi; Weicong Fu; Jianwen Dong; Yuning Cheng. 2018. "Effect of a Submerged Zone and Carbon Source on Nutrient and Metal Removal for Stormwater by Bioretention Cells." Water 10, no. 11: 1629.