PMID- 32829113 OWN - NLM STAT- MEDLINE DCOM- 20200928 LR - 20200928 IS - 1095-8630 (Electronic) IS - 0301-4797 (Linking) VI - 274 DP - 2020 Nov 15 TI - Sustainable urban drainage systems in established city developments: Modelling the potential for CSO reduction and river impact mitigation. PG - 111207 LID - S0301-4797(20)31132-4 [pii] LID - 10.1016/j.jenvman.2020.111207 [doi] AB - Sustainable urban drainage systems (SUDS) can significantly reduce runoff from urban areas. However, their potential to mitigate acute river impacts of combined sewer overflows (CSO) is largely unknown. To close this gap, a novel coupled model approach was deployed that simulates the effect of realistic SUDS strategies, developed for an established city quarter, on acute oxygen depressions in the receiving river. Results show that for an average rainfall year the SUDS strategies reduce total runoff by 28%-39% and peak runoff by 31%-48%. Resulting relative reduction in total CSO volume ranges from 45%-58%, exceeding annual runoff reduction from SUDS by a factor of 1.5. Negative impacts in the form of fish-critical dissolved oxygen (DO) conditions in the receiving river (<2 mg DO L(-1)) can be completely prevented with the SUDS strategies for an average rainfall year. The realistic SUDS strategies were compared with a simpler simulation approach which consists in globally downscaling runoff from all impervious areas. It indicates that such a simple approach does not completely account for the positive effect of SUDS, underestimating CSO volumes for specific rain events by up to 13%. Accordingly, global downscaling is only recommended for preliminary planning purposes. CI - Copyright (c) 2020 Elsevier Ltd. All rights reserved. FAU - Riechel, Mathias AU - Riechel M AD - Kompetenzzentrum Wasser Berlin, Cicerostr. 24, 10709, Berlin, Germany. Electronic address: mathias.riechel@kompetenz-wasser.de. FAU - Matzinger, Andreas AU - Matzinger A AD - Kompetenzzentrum Wasser Berlin, Cicerostr. 24, 10709, Berlin, Germany. FAU - Pallasch, Matthias AU - Pallasch M AD - Ingenieurgesellschaft Prof. Dr. Sieker mbH, Rennbahnallee 109a, 15366, Hoppegarten, Germany. FAU - Joswig, Kay AU - Joswig K AD - Berliner Wasserbetriebe, Neue Judenstrasse 1, 10179, Berlin, Germany. FAU - Pawlowsky-Reusing, Erika AU - Pawlowsky-Reusing E AD - Berliner Wasserbetriebe, Neue Judenstrasse 1, 10179, Berlin, Germany. FAU - Hinkelmann, Reinhard AU - Hinkelmann R AD - Chair of Water Resources Management and Modeling of Hydrosystems, Technische Universitat Berlin, Berlin, 10623, Germany. FAU - Rouault, Pascale AU - Rouault P AD - Kompetenzzentrum Wasser Berlin, Cicerostr. 24, 10709, Berlin, Germany. LA - eng PT - Journal Article DEP - 20200820 PL - England TA - J Environ Manage JT - Journal of environmental management JID - 0401664 SB - IM MH - Cities MH - Models, Theoretical MH - Rain MH - *Rivers MH - *Water Movements OTO - NOTNLM OT - Acute river impacts OT - CSO OT - Integrated modelling OT - SUDS OT - Stormwater management OT - Strategic planning EDAT- 2020/08/24 06:00 MHDA- 2020/09/29 06:00 CRDT- 2020/08/24 06:00 PHST- 2020/03/12 00:00 [received] PHST- 2020/08/04 00:00 [revised] PHST- 2020/08/05 00:00 [accepted] PHST- 2020/08/24 06:00 [pubmed] PHST- 2020/09/29 06:00 [medline] PHST- 2020/08/24 06:00 [entrez] AID - S0301-4797(20)31132-4 [pii] AID - 10.1016/j.jenvman.2020.111207 [doi] PST - ppublish SO - J Environ Manage. 2020 Nov 15;274:111207. doi: 10.1016/j.jenvman.2020.111207. Epub 2020 Aug 20.