Timorese Academic Journal of Science and Technology
ISSN : 2617 - 4944 (Print) ISSN : 2617 - 4952 (Online)
Flood Risk Assessment in Dili: An Integrated GIS-Based Multi-Criteria Analysis Approaches
Author(s):
Apolinário ALVES,
Jovita COSTA,
Nazario Boavida,
Agostinho Andy,
Osvaldo Sarmento,
Cornelio CARDOSO,
Maria ELIAS,
Kiichiro Kawamura,
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Abstract: An integrated GIS-based multi-criteria approaches was employed to analyze the flood risk assessment which enabled to further construct the accurate maps of flood susceptibility and vulnerability as well as Flood Risk, respectively prior to the recent calamity that struck Timor-Leste, especially the Capital Dili on 4th April 2021. The result of the flood risk index (FRI) categorized into four levels: high 3.36 km2 (2%) was being in the vicinity of rivers, flood plains, lakes, and coasts; moderate to high (18.21 km2, 39%)), low to moderate 20.68 km2 (44%) and low to very low 6.62 km2 (14%). The flood susceptibility Index shows that high flood susceptibility cover area of 11.94km2 (8 %), moderate to high: 27.82 km2 (19%), low to moderate: 6.77 km2 (5%), very low: 101.3698 km2 (69%). Most of the potentially susceptible areas of the detected flood were flooded on 4th April 2021.
Keywords: Flood risk assessment, GIS, Map susceptibility, vulnerability, Flood risk index