Hydrological, hydraulic and multicriteria evaluations of flood susceptibility in coastal urban areas: a case study of Juqueriquere River basin in Brazil

Natural disasters like floods have become more frequent due to the increase of extreme climatic events. It is very challenging to understand the hydrological impacts of urban developments in ungauged watersheds. The studied floodplains are in the northern coastline of Sao Paulo, Brazil, comprising limited and non-representative spatially and temporally data. Thus, alternative methods and modelling techniques, such as the multicriteria decision analysis, were used to determine the likelihood of flood susceptibility in the studied plains. The methodology was successful and might be used in other areas, especially where data is scarce and complex physical constraints are involved.