Floods are among the most dangerous natural disasters that affect the development of a region. Flood events worldwide cause the utmost casualties and property damage. Increasing urbanization and population have significant impacts on the natural environment. Human activities such as uncontrolled building constructions in urban areas, land use changes and lack of urban planning, all affect floods. In urban flood management, determining the size and risk areas of the flood is extremely important in order to reduce the possible losses. In this study, five basins which have been experiencing floods caused by climate change and increasing urbanization in Bodrum, which is one of Turkey's most important tourism centers, have been examined. Maximum flood flow rates were calculated in these basins by using Soil Conservation-Curve Number (SCS-CN) precipitation-flow model with the effect of urbanization changes in 1984, 2010, 2011 and 2019. Flood hydrographs of the basins for the years studied were determined. In addition, Multiple Criteria Decision Making (MCDM) model was used to create flood risk maps of basins. As a result of the study, it was determined that the increase in urbanization in the period from 1984 to 2019, caused the flood flows to increase as well as the areas at risk to increase. The flood problems caused by urban growth and distorted urbanization were identified and measures and suggestions to be taken in urban flood management were introduced.
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