A Novel Buffer Tank to Attenuate the Peak Flow of Runoff

Yinghong Qin, Zhengce Huang, Zebin Yu, Zhikui Liu, Lei Wang


Impermeable pavements and roofs in urban areas convert most rainfall to runoff, which is commonly discharged to local sewers pipes and finally to the nearby streams and rivers. In case of heavy rain, the peak flow of runoff usually exceeds the carrying capacity of the local sewer pipes, leading to urban flooding. Traditional facilities, such as green roofs, permeable pavements, soakaways, rainwater tanks, rain barrels, and others reduce the runoff volume in case of a small rain but fail in case of a heavy rain. Here we propose a novel rainwater buffer tank to detain runoff from the nearby sealed surfaces in case of heavy rain and then to discharge rainwater from an orifice at the tank’s bottom. We found that considering a 100m2 rooftop with 0.80 runoff coefficient and a 10cm rainfall depth for an hour, a cubic tank with internal edge side of a square of 2 m attenuates the peak flow about 45%. To reduce a desirable peak flow, the outlet orifice of the buffer tank must be optimized according to site-specific conditions. The orifice can be set at an elevation from the tank’s bottom to create a dead storage for harvesting rainwater.


Urban Flooding; Runoff; Rainwater Tank; Rainwater Management; Peak Flow.


F. Messner, V. Meyer, Flood Damage, Vulnerability and Risk Perception-Challenges For Flood Damage Research, in: J. Schanze, E. Zeman, J. Marsalek (Eds.) Flood Risk Management: Hazards, Vulnerability and Mitigation Measures, Springer Netherlands, Dordrecht, (2006): 149-167. doi:10.1007/978-1-4020-4598-1_13.

Dietz, Michael E. “Low Impact Development Practices: A Review of Current Research and Recommendations for Future Directions.” Water, Air, and Soil Pollution 186, no. 1–4 (September 5, 2007): 351–363. doi:10.1007/s11270-007-9484-z.

Yu, Jianghua, Haixia Yu, and Liqiang Xu. “Performance Evaluation of Various Stormwater Best Management Practices.” Environmental Science and Pollution Research 20, no. 9 (April 2, 2013): 6160–6171. doi:10.1007/s11356-013-1655-4.

Wong, Tony H F. “Water Sensitive Urban Design - the Journey Thus Far.” Australasian Journal of Water Resources 10, no. 3 (January 2006): 213–222. doi:10.1080/13241583.2006.11465296.

Zhang, Lei, Qing Lu, Yongfu Ding, Pan Peng, and Yu Yao. “Design and Performance Simulation of Road Bioretention Media for Sponge Cities.” Journal of Performance of Constructed Facilities 32, no. 5 (October 2018): 04018061. doi:10.1061/(asce)cf.1943-5509.0001209.

D. Butler, J. Parkinson, “Towards sustainable urban drainage”, Water Science and Technology 35(9) (1997): 53-63. doi:10.1016/S0273-1223(97)00184-4.

Zhou, Qianqian. “A Review of Sustainable Urban Drainage Systems Considering the Climate Change and Urbanization Impacts.” Water 6, no. 4 (April 22, 2014): 976–992. doi:10.3390/w6040976.

Loc, Ho Huu, Pham Minh Duyen, Thomas J. Ballatore, Nguyen Hoang My Lan, and Ashim Das Gupta. “Applicability of Sustainable Urban Drainage Systems: An Evaluation by Multi-Criteria Analysis.” Environment Systems and Decisions 37, no. 3 (March 28, 2017): 332–343. doi:10.1007/s10669-017-9639-4.

Sims, Andrew W., Clare E. Robinson, Charles C. Smart, James A. Voogt, Geoffrey J. Hay, Jeremey T. Lundholm, Brandon Powers, and Denis M. O’Carroll. “Retention Performance of Green Roofs in Three Different Climate Regions.” Journal of Hydrology 542 (November 2016): 115–124. doi:10.1016/j.jhydrol.2016.08.055.

DeNardo, J. C., A. R. Jarrett, H. B. Manbeck, D. J. Beattie, and R. D. Berghage. “Stormwater Detention and Retention Abilities of Green Roofs.” World Water & Environmental Resources Congress 2003, ASCE, Philadelphia (June 17, 2003): 1639-1645. doi:10.1061/40685(2003)310.

Ercolani, Giulia, Enrico Antonio Chiaradia, Claudio Gandolfi, Fabio Castelli, and Daniele Masseroni. “Evaluating Performances of Green Roofs for Stormwater Runoff Mitigation in a High Flood Risk Urban Catchment.” Journal of Hydrology 566 (November 2018): 830–845. doi:10.1016/j.jhydrol.2018.09.050.

Xie, Ning, Michelle Akin, and Xianming Shi. “Permeable Concrete Pavements: A Review of Environmental Benefits and Durability.” Journal of Cleaner Production 210 (February 2019): 1605–1621. doi:10.1016/j.jclepro.2018.11.134.

Imran, H.M., Shatirah Akib, and Mohamed Rehan Karim. “Permeable Pavement and Stormwater Management Systems: a Review.” Environmental Technology 34, no. 18 (September 2013): 2649–2656. doi:10.1080/09593330.2013.782573.

Pratt, C.J. “Research and Development in Methods of Soakaway Design.” Water and Environment Journal 10, no. 1 (February 1996): 47–51. doi:10.1111/j.1747-6593.1996.tb00007.x.

Roldin, Maria, Luca Locatelli, Ole Mark, Peter S. Mikkelsen, and Philip J. Binning. “A Simplified Model of Soakaway Infiltration Interaction with a Shallow Groundwater Table.” Journal of Hydrology 497 (August 2013): 165–175. doi:10.1016/j.jhydrol.2013.06.005.

Winston, Ryan J., Jay D. Dorsey, and William F. Hunt. “Quantifying Volume Reduction and Peak Flow Mitigation for Three Bioretention Cells in Clay Soils in Northeast Ohio.” Science of The Total Environment 553 (May 2016): 83–95. doi:10.1016/j.scitotenv.2016.02.081.

Gülbaz, Sezar, and Cevza Melek Kazezyılmaz-Alhan. “Experimental Investigation on Hydrologic Performance of LID with Rainfall-Watershed-Bioretention System.” Journal of Hydrologic Engineering 22, no. 1 (January 2017). doi:10.1061/(asce)he.1943-5584.0001450.

Nachshon, Uri, Lior Netzer, and Yakov Livshitz. “Land Cover Properties and Rain Water Harvesting in Urban Environments.” Sustainable Cities and Society 27 (November 2016): 398–406. doi:10.1016/j.scs.2016.08.008.

Jennings, Aaron A., Ata A. Adeel, Alex Hopkins, Alexandra L. Litofsky, and Steven W. Wellstead. “Rain Barrel–Urban Garden Stormwater Management Performance.” Journal of Environmental Engineering 139, no. 5 (May 2013): 757–765. doi:10.1061/(asce)ee.1943-7870.0000663.

Gao, Yuling, Nicholas Babin, Allison Jeanette Turner, Cheyenne Renee Hoffa, Sara Peel, and Linda Stalker Prokopy. “Understanding Urban-Suburban Adoption and Maintenance of Rain Barrels.” Landscape and Urban Planning 153 (September 2016): 99–110. doi:10.1016/j.landurbplan.2016.04.005.

Jennings, Aaron A., Ata A. Adeel, Alex Hopkins, Alexandra L. Litofsky, and Steven W. Wellstead. “Rain Barrel–Urban Garden Stormwater Management Performance.” Journal of Environmental Engineering 139, no. 5 (May 2013): 757–765. doi:10.1061/(asce)ee.1943-7870.0000663.

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DOI: 10.28991/cej-2019-03091430


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