ABSTRACT

Urban residential areas require adequate drainage systems to manage surface runoff effectively. Proper drainage systems are essential to accommodate rainwater and prevent flooding. The shape and dimensions of drainage channels vary by region, influenced by local conditions. This study examines the drainage system in Simpang Mampang, Depok City, an area frequently affected by flooding. The research focuses on the drainage channels serving Jalan Raya Sawangan, Jalan Pramuka Raya, and Jalan Pramuka II. Capacity and effectiveness assessments of the drainage system under various rainfall scenarios were conducted using SWMM 5.1 software. The findings indicate that the current drainage system requires modifications to enhance its capacity and mitigate flooding. A combined approach involving low-impact development strategies, long- term storage drainage, and conventional methods was proposed. This includes redesigning the shape and dimensions of the existing drainage channels. The integrated solutions aim to optimize runoff management and reduce the risk of flooding in urban areas. These findings contribute to the development of sustainable urban drainage systems that adapt to specific regional characteristics and environmental challenges.