Review article: A review and critical analysis of the efforts towards urban flood risk management in the Lagos region of Nigeria

Urban flooding has been and will continue to be a significant problem for many cities across the developed and developing world. Crucial to the amelioration of the effects of these floods is the need to formulate a sound flood management policy, which is driven by knowledge of the frequency and magnitude of impacts of these floods. Within the area of flood research, attempts are being made to gain a better understanding of the causes, impacts, and pattern of urban flooding. According to the United Nations office for disaster reduction (UNISDR), flood risk is conceptualized on the basis of three integral components which are frequently adopted during flood damage estimation. These components are: probability of flood hazard, the level of exposure, and vulnerabilities of elements at risk. Reducing the severity of each of these components is the objective of flood risk management under the UNISDR guideline and idea of “living with floods”. On the basis of this framework, the present research reviews flood risk within the Lagos area of Nigeria over the period 1968–2012. During this period, floods have caused harm to millions of people physically, emotionally, and economically. Arguably over this period the efforts of stakeholders to address the challenges appear to have been limited by, amongst other things, a lack of reliable data, a lack of awareness amongst the population affected, and a lack of knowledge of flood risk mitigation. It is the aim of this research to assess the current understanding of flood risk and management in Lagos and to offer recommendations towards future guidance

Relationship between urban planning and flooding in Port Harcourt city, Nigeria; insights from planning professionals

Flooding is widely recognised as a global problem which has worsened in recent years due to climate change. In Nigeria, flooding remains the most widespread environmental disaster with the population of 200 million suffering numerous threats from perennial flooding. Port Harcourt in Southern Nigeria experiences annual flooding on a significant scale. While research has linked the flooding in Port Harcourt to poor urban planning, little research has engaged with planning professionals to investigate this relationship. This paper fills this gap. It explores how urban planning is linked to flooding in Port Harcourt and reports on qualitative research undertaken with five urban planners in Port Harcourt. The findings affirm that poor planning and/or lack of compliance with planning regulations are the main factors contributing to the flooding of Port Harcourt. The urban planners gave their expert opinions on how to control the flooding and unanimously agreed that improved planning practices could control the endemic flooding problem in the city. This implies that the government needs to work more closely with urban planners and other stakeholders to effectively control and find a lasting solution to the flooding problem in Port Harcourt city

The impact of flooding on Nigeria’s sustainable development goals (SDGs)

Nigeria has Africa’s biggest economy and a population of over 200 million people. Nigeria faces numerous challenges as it struggles to achieve the Sustainable Development Goals (SDGs) with flooding being the most serious with wide-reaching impacts. This paper highlights the impact flooding has on Nigeria reaching SDGs and enumerates the specific SDGs most directly impacted. A systematic literature review provides an overview of the relationship between flooding in Nigeria and the SDGs. It highlights the main causes of Nigeria’s flooding problem are man-made and advocates spatial planning as a suitable Flood Risk Management (FRM) strategy for the Nigerian environment. The paper calls for collaborative action by all concerned stakeholders to address the flooding problem and to help move Nigeria closer to meeting the United Nations (UN) 2030 SDGs. Most importantly, the evidence presented in this paper seeks to promote action on a national scale to combat the flooding in Nigeria and help the nation work more effectively toward achieving the SDGs