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Integrated machine learning and GIS-based bathtub models to assess the future flood risk in the Kapuas River Delta, Indonesia
Sampurno, J.; Ardianto, R.; Hanert, E. (2023). Integrated machine learning and GIS-based bathtub models to assess the future flood risk in the Kapuas River Delta, Indonesia. Journal of Hydroinformatics 25(1): 113-125. https://dx.doi.org/10.2166/hydro.2022.106
In: Journal of Hydroinformatics: Official Journal of the IAHR-IWA Joint Committee on Hydroinformatics. IWA Publishing: London. ISSN 1464-7141; e-ISSN 1465-1734, meer
Peer reviewed article  

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Author keywords
    climate change; GIS; data-scarce delta; flood risk; machine learning

Auteurs  Top 
  • Sampurno, J., meer
  • Ardianto, R.
  • Hanert, E., meer

Abstract
    As more and more people live near the sea, future flood risk must be properly assessed for sustainable urban planning and coastal protection. However, this is rarely the case in developing countries where there is a lack of both in-situ data collection and forecasting tools. Here, we consider the case of the Kapuas River Delta (KRD), a data-scarce delta on the west coast of Borneo Island, Indonesia. We assessed future flood risk under three climate change scenarios (RCP2.6, RCP4.5, and RCP8.5). We combined the multiple linear regression and the GIS-based bathtub inundation models to assess the future flood risk. The former model was implemented to model the river's water-level dynamics in the KRD, particularly in Pontianak, under the influence of rainfall changes, surface wind changes, and sea-level rise. The later model created flood maps with inundated areas under a 100-year flood scenario, representing Pontianak's current and future flood extent. We found that about 6.4%–11.9% more buildings and about 6.8%–12.7% more roads will be impacted by a 100-year flood in 2100. Our assessment guides the local water manager in preparing adequate flood mitigation strategies.

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