ASSESSMENT OF THE ENVIRONMENTAL AND HEALTH RISK OF URBAN FLOODING IN OGUTA, IMO STATE, NIGERIA - CONDENSED VERSION WITH SUSTAINABLE PROCUREMENT INTEGRATION

ABSTRACTUrban flooding poses significant risks to both the environment and public health, particularly in regions with inadequate infrastructure and poor sanitary conditions. In 2023, the floods in Oguta, Imo State, Nigeria, led to a marked increase in the prevalence of vector- and waterborne diseases, including cholera, typhoid fever, and malaria. This study employs Geographic Information Systems (GIS) to analyse the environmental and health impacts of the 2023 floods, assess progress by 2025, and propose strategies for mitigating future risks. Data was gathered from environmental assessments and health records, comparing disease prevalence across 2023 and 2025. Key environmental factors contributing to flood risk included rainfall intensity, proximity to rivers, drainage density, and land use. GIS analysis revealed that regions near rivers and with poor drainage systems were the most flood-prone, while built-up areas and water bodies showed the highest susceptibility to flooding. Improvements in sanitation and water quality by 2025 resulted in a reduction in waterborne diseases, although malaria cases persisted, underscoring the need for enhanced vector control measures. Sustainable procurement practices, such as the use of permeable pavements and green roofs, demonstrated effectiveness in reducing surface runoff and enhancing infrastructure resilience. The study highlights the importance of integrating sustainable procurement into flood risk management and recommends comprehensive measures including improved sanitation, vector control programs, infrastructure upgrades, and efficient land use planning. These actions, supported by GIS-based mapping and risk assessment, will contribute to a more resilient urban environment in Oguta.Keywords: GIS, Flood Risk Management, Sustainable Procurement, Urban Flooding, Public Health, Vector-Borne Diseases.