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Register TodayImpact of climate-induced disasters on the sustainability of cities: An urban resilience perspective on floods 2025, 4 (1): 1-17 DOI 10.37357/1068/JESR/4.1.01
Mutu Tantrige Osada Vishvajith Peiris
Department of Urban Planning and Design, University of Hong Kong, Pok Fu Lam, Hong Kong
Climate change has intensified extreme rainfall and flood events, posing significant threats to ur-ban sustainability. Floods, among the most catastrophic disasters, disrupt livelihoods and irreversi-bly damage economies, making disaster risk reduction critical for achieving safe, inclusive, and sus-tainable cities in line with the Sustainable Development Goals. Urban resilience, reflecting a city’s ability to respond, recover, and maintain core functions during disasters, is challenging to assess due to complex urban system interactions and the non-linear nature of climate emergencies. This study examines resilience through land use changes as indicators of urban sustainability against flood disasters, using Colombo City, Sri Lanka, as a case study. The research evaluates urban flood resilience (UFR) based on ten natural, physical, and social parameters, integrating urban growth simulation, flood modeling, and geospatial assessments at a 30-meter resolution. Land use catego-ries; waterbodies, wetlands, vegetation, and urban built-up areas; were analyzed alongside resili-ence classifications ranging from flood-susceptible to highly responsive. Results reveal that high-resilience areas are concentrated in vegetated high elevations and urban zones with effective drainage systems, while low-resilience areas are heavily populated floodplains and impervious city-center areas with limited greenery. Regression analysis confirms that impervious surfaces exacer-bate flood risk, while vegetation and wetlands provide long-term resistance to extreme rainfall. The findings emphasize the need for green infrastructure-oriented drainage networks and sustainable urbanization to mitigate pluvial floods. Incorporating land use changes and socio-economic factors highlights the importance of disaster preparedness at the grassroots level for effective mitigation strategies. From an urban planning perspective, this approach aids in guiding future land use changes, prioritizing sustainable growth, and informing decision-makers on resource allocation to enhance flood resilience in cities.
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The author(s) has received no specific funding for this article/publication.