Flood Hazard and Risk Reduction Strategies in Homagama Divisional Secretariat Division: A Study of Pre and Post Intervention Mitigation Approaches

A.A.R. Thamodi and B.A. Sumanajith Kumara
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A.A.R. Thamodi: Faculty of Graduate Studies, University of Sri Jayewardenepura, Sri Lanka
B.A. Sumanajith Kumara: Department of Geography, Faculty of Humanities and Social Sciences, University of Sri Jayewardenepura, Sri Lanka

International Journal of Research and Innovation in Applied Science, 2025, vol. 10, issue 5, 82-96

Abstract: Flood hazard is one of the predominant hydro-meteorological disasters affecting the Homagama Divisional Secretariat Division (DSD), primarily driven by intense rainfall events. The main objective of this research is to examine the nature of the flood hazard and risk reduction strategies in Homagama DSD. Primary and secondary data were collected through official reports, institutional documents, scholarly articles, online sources, field observations, and informal discussions with local officials, residents, and experts. Among the 81 Grama Niladhari Divisions (GNDs) in Homagama, 22 have been identified as highly vulnerable to flooding, particularly during the south-west monsoon. In addition to heavy rainfall, topographical conditions, rapid development, and the presence of the Kelani River contribute to the area’s flood risk. The consequences include significant damage to lives, property, and infrastructure. A structured response framework has been established to enhance community-based disaster preparedness and facilitate the delivery of relief services during flood events. Although relevant authorities have initiated multi-phase strategies for flood risk reduction, further development and integration are crucial to ensure effective and sustainable flood management. This study highlights the significance of both structural and non-structural flood mitigation measures in enhancing flood resilience and reducing disaster risk in Homagama DSD.

Date: 2025
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