Understanding engineering approaches to urban flood management in Indonesia

Flooding in urban areas is headline news every year, especially in Indonesia. Developing gray infrastructure in Indonesia is still a leading trend for flood disaster management, such as canalization. Moreover, the emergence of green infrastructure (GI) as a promising future urban flood mitigation strategy has received considerable attention. Gray infrastructure and GI need to be further analyzed to select the most appropriate scenarios in a certain location. This chapter proposes an engineering approach for urban flood management by employing numerical programs as supporting tools, such as HEC-RAS and the personal computer stormwater management model (PC-SWMM), which align with the case studies in Jakarta and Ambon, respectively. HEC-RAS can provide policy scenarios regarding canalization, whereas PC-SWMM delivers GI strategies. Both supporting tools produce quantitative results in terms of flood reduction and various scenario alternatives in the water-related disaster management field. The tools can provide recommendations to policy makers on whether projected scenarios can have a promising impact on the environment and urban flooding.