Two-dimensional modeling of flood wave propagation in residential areas after a dam break with application of diffusive and dynamic wave approaches

Marangoz H. O., Anılan T.

NATURAL HAZARDS, vol.110, no.1, pp.429-449, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 110 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.1007/s11069-021-04953-w
  • Journal Name: NATURAL HAZARDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, IBZ Online, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Environment Index, Geobase, INSPEC, Metadex, PAIS International, Pollution Abstracts, Veterinary Science Database, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.429-449
  • Keywords: Dam break, Diffusive wave, Dynamic wave, Flood wave propagation, Flow routing
  • Karadeniz Technical University Affiliated: Yes

Abstract

In this study, a two-dimensional hydraulic routing model was applied to a sudden failure scenario for the Atasu Dam in Trabzon, Turkey. The goal was to simulate spreading and propagation of a dam break flood wave along a narrow valley into a downstream city center with many buildings. Flow properties along the downstream were routed according to diffusive and dynamic wave models represented by Saint-Venant equations. Maximum flow depth, maximum flow velocity, and time moment of the maximum flow depth maps are shown in a Geographic Information System environment. The results predict that flow depths could reach approximately 8 m in the residential area, and this would be achieved approximately 32 min after the dam-break event. Houses in a large section of the city center would be under the maximum flow depths. The results of this study demonstrate that these two approaches can determine potential risk areas of a floodplain due to natural hazards and facilitate preparation of emergency action plans.