Urban Flood Risk Management Based on Asset Life Cycle Method for Drainage System: Case Study Gedebage Area, Bandung, Indonesia

Flooding is a natural phenomenon influenced by various factors and occurs frequently across many regions in Indonesia, including Gedebage in Bandung City, West Java. Gedebage is one of the city’s lowest-lying areas, with an elevation of 666–669 meters above sea level, making it particularly prone to recurrent flooding. The main issue is the absence of an integrated disaster management system. This research aims to identify the drainage system's asset life cycle (planning, implementation, and operation & maintenance) and assess flood risk in Gedebage. The risk assessment was conducted using questionnaires to evaluate the likelihood and potential impact of risks. In response to major risks, appropriate mitigation strategies were developed. Mitigation efforts included both structural and non-structural measures. The structural mitigation design involved selecting technological alternatives using the Analytical Hierarchy Process (AHP), a decision-making tool that helps compare multiple criteria and alternatives in a structured way. The results indicate that 27% of the assessed risks were unacceptable, 42% undesirable, and 31% acceptable. Flood risk in Gedebage can be managed through structural actions, such as drainage revitalization using a closed system, and non-structural strategies, including human-centric, administrative, and cultural approaches. Based on AHP analysis, the most effective technology was a closed drainage system and porous paving blocks.