Assessment of flood hazard areas at a regional scale using an index-based approach and Analytical Hierarchy Process: Application in Rhodope–Evros region, Greece

The present study introduces a multi-criteria index to assess flood hazard areas in a regional scale. Accordingly, a Flood Hazard Index (FHI) has been defined and a spatial analysis in a GIS environment has been applied for the estimation of its value. The developed methodology processes information...

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Veröffentlicht in:The Science of the total environment Jg. 538; S. 555 - 563
Hauptverfasser: Kazakis, Nerantzis, Kougias, Ioannis, Patsialis, Thomas
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Netherlands Elsevier B.V 15.12.2015
Schlagworte:
Analytic hierarchy process
Analytical Hierarchy Process
analytical methods
Criteria
drainage
Flood hazards
Flood mapping
Flood prone areas
Floods
geographic information systems
GIS analysis
Greece
Hazard assessment
land use
Methodology
operations research
rain intensity
Regional
Sensitivity analysis
MED, Greece
Greece
Flood prone areas
GIS analysis
Sensitivity analysis
Flood hazards
Analytical Hierarchy Process
ISSN:0048-9697, 1879-1026, 1879-1026
Online-Zugang:Volltext
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Zusammenfassung:The present study introduces a multi-criteria index to assess flood hazard areas in a regional scale. Accordingly, a Flood Hazard Index (FHI) has been defined and a spatial analysis in a GIS environment has been applied for the estimation of its value. The developed methodology processes information of seven parameters namely flow accumulation, distance from the drainage network, elevation, land use, rainfall intensity and geology. The initials of these criteria gave the name to the developed method: “FIGUSED”. The relative importance of each parameter for the occurrence and severity of flood has been connected to weight values. These values are calculated following an “Analytical Hierarchy Process”, a method originally developed for the solution of Operational Research problems. According to their weight values, information of the different parameters is superimposed, resulting to flood hazard mapping. The accuracy of the method has been supported by a sensitivity analysis that examines a range for the weights' values and corresponding to alternative scenarios. The presented methodology has been applied to an area in north-eastern Greece, where recurring flood events have appeared. Initially FIGUSED method resulted to a Flood Hazard Index (FHI) and a corresponding flood map. A sensitivity analysis on the parameters' values revealed some interesting information on the relative importance of each criterion, presented and commented in the Discussion section. Moreover, the sensitivity analysis concluded to a revised index FHIS (methodology named FIGUSED-S) and flood mapping, supporting the robustness of FIGUSED methodology. A comparison of the outcome with records of historical flood events confirmed that the proposed methodology provides valid results. [Display omitted] •Literature review of spatial, GIS-based methods for flood exposure assessment.•Development of an index-based methodology to assess the flood hazard areas.•The methodology analyzes 7 parameters to assess flood exposure.•Analytical Hierarchy Process is used to estimate the weights of the parameters.•A sensitivity analysis results to a second more reliable index (FHIS).
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0048-9697
1879-1026
1879-1026
DOI:10.1016/j.scitotenv.2015.08.055