The New Yogyakarta International Airport has become one of Indonesia’s National strategic projects and potentially support the development of the Aerotropolis area around the airport. Located on the southern coast of Yogyakarta with rivers at the airport’s upstream, flooding can be a threat to the Aerotropolis area and the Yogyakarta International Airport. This research aims to investigate and model the flood review of the existing design of the flood control system of the Aerotropolis area and find out the possible option of better flood control in the area. The one-dimensional Hydrologic Engineering Center-River Analysis System (HEC-RAS) 4.1 was used to simulate the flood and its control in the Aerotropolis area. Simulation of flood control options includes river normalization, optimization of flood gates, retarding basin, and flood pumps. The present study proposed adjustment of performing in the use of a flood control alternative. Alternative flood control at each flood-prone area was adjusted to the level of flooding risk in the area. In conclusion, the use of retarding basin and flood pumps highly recommended to prevent flooding at the Aerotropolis area of Yogyakarta International Airport.

新日惹国际机场已成为印度尼西亚的国家战略项目之一，并有可能支持机场周边航空城地区的发展。位于日惹南部海岸，机场上游有河流，洪水可能对 Aerotropolis 地区和日惹国际机场构成威胁。本研究旨在对航空城地区防洪系统现有设计的防洪评估进行调查和建模，并找出该地区更好的防洪方案。一维水文工程中心-河流分析系统（HEC-RAS）4.1用于模拟航空城地区的洪水及其控制。洪水控制选项的模拟包括河流正常化、水闸优化、缓流盆地和洪水泵。本研究建议在使用防洪替代方案时调整执行。每个洪水易发地区的替代防洪措施都根据该地区的洪水风险水平进行了调整。总之，强烈建议使用缓速盆地和洪水泵来防止日惹国际机场的 Aerotropolis 地区发生洪水。