Urban Flood Resilience Analysis Using GIS-Based AHP and Modified S-FRESI Approach: A Case Study of Gyor City, Hungary

Abstract

Abstract Urban flooding has gained great attention in recent years since the population in urban areas has become more vulnerable to climatic extremes. The rate of urban flooding has increased around the globe mainly due to climate change. To cope with an increasing flooding issue, there has been an increased effort to manage flood management in urban areas. Similarly in this study, an attempt was made to develop a GIS-based thematic map to assess flood resilience in the Gyor city, Hungary. Gyor City is particularly vulnerable to flooding due to its geographical proximity at the confluence of Raba, Rabca, Mosoni, Marcal, and the great Danube rivers. Three elements i.e., hazard, Exposure, and coping capacity with each having pre-determined parameters were selected and processed through Analytic Hierarchy Process (AHP) technique. The product value maps of the elements were then analyzed in a Geographical Information System (GIS) using the Modified Specialized Flood Resilience (S-FRESI) approach. The resultant product map shows that 43.7% of the study area had a low to very low level of resilience, followed by 23.5% of the area with a high to very high level of resilience, while 32.5% of the area had a medium level of resilience to floods.