Flood Risk Assessment of Residential Areas for Disaster Mitigation: A Geospatial-based Approach in Gorontalo Regency, Gorontalo Province

Irawan Matalapu, Marini Susanti Susanti, Muzdalifah Alya Amalia Manese

Abstract


Rapid population growth in Gorontalo Regency, Gorontalo Province, has increased demand for residential land, despite the region’s high vulnerability to flooding driven by intense rainfall and land use change. This study aims to map the spatial distribution of flood risk and propose mitigation strategies for flood-prone residential areas. Spatial analysis using scoring and overlay techniques was applied to parameters including rainfall, soil texture, slope, elevation, and land use. Results indicate that 39.22% of the area (84,654.70 ha) has low vulnerability, 51.52% (111,218.94 ha) moderate, and 9.26% (19,998.45 ha) high. High-risk zones are concentrated in low-lying districts such as Limboto, West Limboto, Telaga, Telaga Biru, and Dungaliyo, particularly within the Limboto and Paguyaman watersheds. Recommended mitigation measures include reforestation, limiting land conversion, enforcing risk-based spatial planning, developing flood-control infrastructure, and strengthening community awareness. These findings support sustainable, disaster-aware spatial planning and improved flood risk management.


Keywords


Flood Risk; Residential; Disaster Mitigation; Geospatial

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DOI: https://doi.org/10.17509/gea.v26i1,%20April.88076

DOI (PDF): https://doi.org/10.17509/gea.v26i1.88076.g36236

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