This study assesses the water resources and environmental challenges of Lagos mega city, Nigeria, in the context of climate change. Being a commercial hub, the Lagos population has grown rapidly causing an insurmountable water and environmental crisis. In this study, a combined field observation, sample analysis, and interviews were used to assess water challenges. Observed climate, general circulation model (GCM) projections and groundwater data were used to assess water challenges due to climate change. The study revealed that unavailability of sufficient water supply provision in Lagos has overwhelmingly compelled the population to depend on groundwater, which has eventually caused groundwater overdraft. Salt water intrusion and subsidence has occurred due to groundwater overexploitation. High concentrations of heavy metals were observed in wells around a landfill. Climate projections showed a decrease in rainfall of up to 140 mm and an increase in temperature of up to 8 °C. Groundwater storage is projected to decrease after the mid-century due to climate change. Sea level rise will continue until the end of the century. As the water and environmental challenges of Lagos are broad and the changing characteristics of the climate are expected to intensify these as projected, tackling these challenges requires a holistic approach from an integrated water resources management perspective.

这项研究评估了气候变化背景下尼日利亚拉各斯大城市的水资源和环境挑战。作为商业中心，拉各斯人口迅速增长，造成了无法克服的水和环境危机。在这项研究中，结合了现场观察，样品分析和访谈来评估水挑战。观测到的气候，一般循环模型（GCM）预测和地下水数据被用于评估由于气候变化而引起的水资源挑战。该研究表明，拉各斯没有足够的供水设施，这迫使人们不得不依靠地下水，这最终导致了地下水的透支。由于地下水的过度开采，咸水入侵和沉降已经发生。在垃圾填埋场附近的井中观察到高浓度的重金属。气候预测表明，降雨量减少了140毫米，温度上升了8摄氏度。预计到本世纪中叶以后，由于气候变化，地下水存储量将减少。海平面上升将持续到本世纪末。由于拉各斯的水和环境挑战广泛，气候变化的特征预计将如预期的那样加剧，因此，从综合水资源管理的角度出发，应对这些挑战需要采取一种整体的方法。海平面上升将持续到本世纪末。由于拉各斯的水和环境挑战广泛，气候变化的特征预计将如预期的那样加剧，因此，从综合水资源管理的角度出发，应对这些挑战需要采取一种整体方法。海平面上升将持续到本世纪末。由于拉各斯的水和环境挑战广泛，气候变化的特征预计将如预期的那样加剧，因此，从综合水资源管理的角度出发，应对这些挑战需要采取一种整体的方法。