Investigating Vulnerability of Urban Areas to Flood Using TOPSIS Method (Case study: Azimiyeh, Karaj)

Document Type : Research Paper

Authors

1 Graduate)M.Sc.( Student in Watershed Managment, Faculty of Natural Resources, University of Tehran, Karaj, Iran

2 Professor,Faculty of Natural Resources, University of Tehran, Karaj, Iran

3 Associate Professor, Faculty of Natural Resources, University of Tehran, Karaj, Iran

4 Assistant Professor, International Desert Research Center, University of Tehran, Karaj, Iran

Abstract

The complexity of the urban environment makes it difficult to consider all the vulnerable components of the urban. Hence, decision-making in urban environments is one of the most important issues in modern management. As a result, the purpose of this study is to investigate the urban vulnerability of Azimiyeh in Karaj to flood based on multi-criteria decision-making method. The statistical population includes specialists who had sufficient knowledge and experience in the field of vulnerability management in urban areas. To this research, first, comprehensive knowledge of the factors affecting the urban vulnerability to floods was obtained using library studies, and then, the results of the Delphi technique, , was shown that among the primary indices, a total of 11 effective indicators were selected and a map of each of them was prepared using ArcGIS software. Then, the urban vulnerability to floods was calculated using the TOPSIS method. The study area was divided into 13 sub-areas based on runoff directional pattern and field observations, and then the decision matrix was made according to 13 sub-areas and 11 indicators. The results showed the vulnerability of this region to floods, which among the studied sub-areas, in sub-areas No. 1 and 2 observed the highest of flood vulnerability and the lowest of it observed in sub-area No. 13. Causes of flood vulnerability in the region include a direct connection to the upstream catchment that has lithology impermeable and geologically impermeable, high-density of building and population, and lack of proportionate open spaces.

Keywords

References

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Journal of Range and Watershed Managment
Volume 74, Issue 1
June 2021
Pages 23-36

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History

  • Receive Date: 23 May 2020
  • Revise Date: 23 April 2021
  • Accept Date: 12 December 2020
  • First Publish Date: 22 May 2021

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