DOI: https://doi.org/10.14710/presipitasi.v0i0.%25p

Interannual Climate Variability Impacts on Rainfall Extremes and Flooding in Bandung

*Jogi Ruben Natanael Panggabean orcid  -  Universitas Padjadjaran, Indonesia
Fadli Syamsudin orcid  -  Universitas Padjadjaran, Indonesia
Suaydhi Suaydhi orcid  -  ational Research and Innovation Agency, Indonesia
Noir Purba orcid  -  Universitas Padjadjaran, Indonesia
Xingru Feng orcid  -  Institute of Oceanology Chinese Academy of Sciences, China

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Abstract

Bandung metropolitan region confronts escalating flood threats (2014-2024), yet oceanic climate-rainfall relationships remain uninvestigated. Our study investigates interannual climate variability influences on extreme precipitation and flooding utilizing historical records and GPM-IMERG satellite measurements validated at 90.4% correlation with BMKG. Bojongsoang (117 events), Lembang (49 events), and Braga (42 events) emerge as highest-risk areas. Peak flooding in January 2020 (15 events) coincided with La Niña and negative IOD phases. Wet season daily maximum rainfall averages 62 mm versus 41 mm in dry season, with heavy rain days of 36 versus 8 days. La Niña increases heavy rain days to 62.5 days compared to El Niño (38.6 days) and extreme rainfall to 399.6 mm versus 244.2 mm. Negative IOD enhances daily maximum to 76.8 mm versus 56.8 mm during positive phases. Flood months show 81.3 heavy rain days versus 14.4 in normal months. Early warning thresholds established at >70 mm daily maximum, >60 heavy rain days, and >400 mm extreme precipitation. 

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Keywords: Climate variability; el niño-southern oscillation; extreme precipitation; floods; indian ocean dipole; madden-julian oscillation

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Section: Regional Case Study
Language : EN
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