Implementing Sustainable Drainage Systems for Urban Flood Resilience in Medan

This research is motivated by the significant impact of flood disasters, both in terms of material and non-material losses, as well as the difficulty in determining priority scales for flood management in the city of Medan. The drainage system no longer functions as intended, either due to its capacity being smaller than the existing discharge, lack of maintenance, or drainage and disposal systems that no longer align with environmental conditions, among other factors. These issues result in recurring annual flooding. The objective of this research is to implement a drainage system for flood disaster risk mitigation in a case study of the Medan city area, including mapping flood vulnerability and susceptibility indices through drainage system design, and providing guidelines for drainage system design in Medan. The research methodology involves collecting both primary and secondary data. A flood risk index map is compiled based on vulnerability, susceptibility, and capacity indices in the study area. The development of these indices for the drainage areas in Medan city is conducted using parameter weighting with the support of Geographic Information System (GIS) technology, rainfall data from BMKG (Meteorology, Climatology, and Geophysical Agency), land use data, and more. Furthermore, periodic flood discharge is calculated using the Rational Method. The research method used is research and development (R&D).