DRAINAGE SYSTEM

Flooding is a recurring environmental hazard that continues to pose significant challenges to urban development, particularly in rapidly growing cities of developing countries like Nigeria. This study investigates the causes, extent, and possible mitigation measures for flooding along Edaiken Primary School Road and its environs in Benin City, with the aim of improving stormwater management and promoting sustainable urban resilience. The researchevaluates the efficiency of existing drainage infrastructure, identifies flood-prone zones, and designs an appropriate drainage system to mitigate runoff accumulation. A combination of field observations, hydrological data collection, and GIS-based spatial analysis was employed to assess catchment characteristics and flow patterns. The drainage catchment was delineated into five sub-catchments (SC1–SC5), each with distinct topographic and hydrological properties. Results from the analysis revealed that sub- catchments SC3 and SC4 contribute the largest volumes of runoff due to their lower elevation and higher flow accumulation potential. The hydrological parameters indicated short times of concentration (0.284–0.583 hours) and high rainfall intensities (137.034–175.972 mm), which are typical of urbanized areas with low infiltration capacity.