Urban acupuncture as a strategy for revitalizing urban voids in Colombo: a framework for sustainable urban integration

Abstract

Rapid urbanization and large-scale development in Colombo, Sri Lanka, have produced fragmented urban spaces and underutilized voids that disrupt connectivity, social interaction, and ecological balance. Conventional large-scale planning often overlooks the potential of these smaller, neglected spaces to contribute to sustainable urban regeneration. This study employs a qualitative case study methodology to examine the applicability of Urban Acupuncture (UA) as a targeted, context-sensitive strategy for revitalizing urban voids. Colombo was selected due to its spatial fragmentation, high-density commercial activity, and prevalence of underused sites, with the railway corridor between Pettah and Beira Lake serving as the focus area. Morphological analysis, historical review, site observation, and functional mapping were used to identify critical voids, within which a site was chosen for detailed study based on its strategic location, accessibility, and latent social, economic, and ecological potential. Findings indicate that small, carefully planned interventions guided by UA principles, such as citizen participation, ecological enhancement, and flexible open-space design, can transform these isolated voids into active urban nodes that reconnect fragmented sectors, support informal economies, and integrate heritage and ecological assets. While the study does not assess long-term impacts, it provides a practical framework for applying UA in Colombo and similar contexts, demonstrating that precise, small-scale interventions can catalyze inclusive, sustainable, and resilient urban development.