This study seeks to propose a standardized approach and methods for mapping urban drainage systems in developing communities. The research draws on a case study from the Philippines, which sought to conduct rapid elevation surveys and drainage assessments employing open source geographical information system (GIS) tools. We develop a standardized procedure for digitizing drainage systems using OpenStreetMap and Field Papers, as well as discuss applications of this data for drainage design. The results contribute to a methodological framework that can be replicated in other similar developing communities where study of urban drainage is needed for sustainable development and disaster risk reduction efforts.
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Carigara is a municipality located in the province of Leyte in the Philippines, home to a population of more than 50,000. It is a lively and vibrant town surrounded by green paddy fields and under beautiful mountains. Like many places in the Philippines however, flooding has been a persistent issue,