<![CDATA[This study focuses on enhancing the flood hazard assessment parameters inIndonesia, particularly within the framework established by the National DisasterManagement Agency (NDMA) of the Republic of Indonesia. Given themultifaceted nature of flood hazards, influenced by factors such as land coverchange, climate change, and the failure of flood control structures, it is essentialto adopt a more comprehensive approach to flood hazard assessment. The researchwas conducted in the Sikambing Watershed in Medan City, North SumatraProvince, an area that has experienced 12 significant flood events affecting over13,000 individuals between 2020 and 2024. To improve the flood hazardassessment, this study employs a quantitative method where hydrological andhydraulic analyses serve as the empirical foundation, and flood hazard mappingis carried out by modifying existing parameters to incorporate flood depth (d),flow depth and velocity (dv), and flood duration (T). Additionally, a comparisonis made with the flood hazard map based on NDMA parameters to analyze thechanges in hazard classification. The resulting flood hazard map indicates a totalinundated area of 227.65 hectares; however, the use of different parameters resultsin significant changes in the proportions of each hazard class. While the lowclassification dominates both maps, there is an increase in the inundated areaclassified as medium, covering 17.43 hectares, compared to only 3.25 hectares forthe medium hazard classification in the NDMA-based flood hazard map. Theseresults demonstrate that parameter modification provides a more comprehensivepicture of flood hazard assessment. This research is expected to contribute todisaster mitigation planning, evacuation strategies and the development of moreeffective flood control infrastructure.]]>
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