Original ResearchPublished 1 October 2026Data-driven water quality mapping of urban water bodies for sustainable cities and communities: integrating smartphone sensing and geographic information systems—a case study of Beira Lake, Sri LankaNiroshan Sanjaya Bandara · Amila Buddhika Jayasinghe · Günther RetscherFrontiers in Sustainabilitydoi 10.3389/frsus.2026.1928065