A comparative evaluation of flood mitigation alternatives using GIS-based river hydraulics modelling and multicriteria decision analysis

Research output: Contribution to journalArticle

Abstract

A multicriteria framework is developed for the selection of optimal flood mitigation and river training measures in a selected reach of Zaremroud River in Northern Iran. A river model, Hydrologic Engineering Center River Analysis System, combined with geographic information system analysis is used to simulate water levels for steady, gradually varied flow and mapping inundated flood extents. The modelling is performed for four different alternatives, considering various channel modifications with different dimensions and levee construction. Flood inundation area, flood level, flow velocity and stream power on the downstream and outside of the river bend are used as decision criteria for each alternative. Economic analysis is conducted to evaluate the cost-effectiveness of each alternative. The decision analysis method, technique for order of preference by similarity to ideal solution, is used to compare different flood hazard mitigation measures based on risk, and environmental and economic impacts criteria. The findings of the analysis are that a levee construction at the right side of the river bank adjacent to the residential area is superior to the other three alternatives, which is confirmed using a scenario analysis of different flood mitigation measures.

Details

Authors
External organisations
  • University of Saskatchewan
  • Mazandaran University
  • University of Waterloo
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Oceanography, Hydrology, Water Resources

Keywords

  • Decision analysis, Flood mitigation, Flood plain, HEC-RAS, TOPSIS
Original languageEnglish
Pages (from-to)319-331
Number of pages13
JournalJournal of Flood Risk Management
Volume6
Issue number4
Publication statusPublished - 2013 Dec 1
Publication categoryResearch
Peer-reviewedYes
Externally publishedYes