Flash flood simulations for an Egyptian city - mitigation measures and impact of infiltration

Journal Article · 12 January 2020 · Urban Water Journal

DOI: https://doi.org/10.1080/1573062X.2020.1713171 · OSTI ID:1603597

Tügel, Franziska ^[1]; Özgen-Xian, Ilhan ^[2]; Marafini, Ester ^[3]; Hadidi, Ahmed ^[4]; Hinkelmann, Reinhard ^[1]

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1. Technische Univ., Berlin (Germany)
2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
3. Univ. Degli Studi, Rome (Italy)
4. German Univ. of Technology in Oman, Muscat, (Sultanate of Oman)

Here, the impact of mitigation measures and infiltration on flash floods is investigated by using a 2D robust shallow water model including infiltration with the Green-Ampt model. The results show the combined effects of infiltration and mitigation measures as well as the effectiveness of bypass channels in addition to retention basins. Retention basins at appropriate locations could reduce the maximum water depth at critical locations by 23%, while the additional implementation of drainage channels lead to a reduction of 75%, considering also infiltration lead to a further reduction of 97%. If infiltration was considered without mitigation measures, the peak water depth was reduced by 67%. For an exceptional extreme event the measures lead to a reduction of 73% at some locations, while at other locations the overflow from retention basins due to overstraining generated even higher inundations with an increase of 58%.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1603597
• Journal Information: Urban Water Journal, Journal Name: Urban Water Journal Journal Issue: 5 Vol. 17; ISSN 1573-062X
• Publisher: Taylor & FrancisCopyright Statement
• Country of Publication: United States
• Language: English