Spatial Modelling of Flood Inundation Case Study of Pesangggrahan Floodplain, Jakarta, Indonesia

Background: Floods pose hazards to society, the environment, and the economy. For instance, the flood in Jakarta on 15–23 January 2013 blocked roads, forced businesses in the capital to close, and displaced at least 20,000 people.

Aims: This research is aimed at estimating the flood inundation in Jakarta City for different return periods of expected peak discharges.

Methodology: The hydraulics and floodplain delineation were conducted to identify the inundated areas using a coupled HEC-RAS and WMS approach for the January 2013 flood. Field survey to get flood depth and flood extent information from the local residents was also done.

Results: The results showed that the model estimates were close to the observed data and this approach can be applied to other flood vulnerable areas, particularly in floodplain areas. Finally, this study is useful for scientists and water engineers who are interested in the development of risk mapping of flood hazards.