![]() ![]() ![]() This tool, which was designed as an ArcGIS add-in called ArcDrain, consists of the discretization of urban areas into subcatchments and the subsequent application of the rational method for runoff depth estimation. Under these premises, this work sought to produce a tool for automated determination of urban surface runoff using a geographic information systems (GIS). To this end, the spatial identification of urban areas prone to runoff accumulation is essential, to guarantee effective water management in the future. Surface runoff determination in urban areas is crucial to facilitate ex ante water planning, especially in the context of climate and land cover changes, which are increasing the frequency of floods, due to a combination of violent storms and increased imperviousness. ![]()
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