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Urban flooding often times staggers the livelihood in an urban area, which most likely happens in the lowland urban area. Therefore, the existing urban drainage system hould be improved in order to tackle the upcoming urban flooding events, which are more than likely to be more devas tating than those in the previous years. The resear ch location is in Palembang, Sumatra, Indonesia, where 30% of its urb an part is a lowland area. The selected Aur Sub Cat chment is located in Silaberanti. The main objective of this re earch is to improve the current drainage system in order to achieve the optimal design for urban drainage arrangement. This research was developed using Duflow Modelling Studio 3.8.3 in collaboration with ArcGIS 10.1 to schematize the dr ainage system and analyse the spatial and topograph ical condition of the research area. As a result, there are three dev lopment scenarios established by Duflow Modelli ng Studio in order to improve the drainage system in the research area . The first scenario is the current and extreme con dition in the study area. The second scenario is the extreme condition, which is represented by the extreme rainfall. The third scenario is the improvement possibilities of the existing drain age system. There are three different types of impr ovements and modifications for the third scenario which are: can al dredging, canal dike/embankment, a pump installa tion, and a flap gate installation. In conclusion, based on three differe nt scenario analyses, the most feasible, suitable, eff ctive, and efficient alternative for overcoming the flooding in Silabera nti is a flap gate installation combined with dike construction in the flood risk sections of the river because it works a utomatically depending on the water level in the Ri ver.

Urban Drainage Management and Flood Control Improvement Using the Duflow Case Study: Aur Sub Catchment, Palembang, South Sumatra, Indonesia