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Nigeria's free digital learning hub. Videos, lecture notes, practice questions and leaderboards aligned with CCMAS, NBTE, NCCE, WAEC, NECO, IJMB and JAMB curricula.
Environmental Health Science · 300 Level
This is the complete lecture note for URP 302 Planning Studio IV, prepared for Environmental Health Science students at 300 Level. You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Course code: URP 302 Course title: Planning Studio IV Course credit load: 2 Units List of Series: Series 1: Urban Renewal Concepts and Housing Needs Series 2: Principles, Goals and Methods of Urban Renewal Series 3: Socio-Cultural and Economic Effects of Urban Renewal Series 4: Costs, Benefits and Management of Urban Schemes Series 5: Field Survey, Data Analysis and Design Solutions 1 Urban Renewal Concepts and Housing Needs Series outline Part 1 (1.1): Concepts and Definitions of Urban Renewal Sub-Part 1.1.1: Definition and scope of urban renewal Sub-Part 1.1.2: Historical evolution of urban renewal practice Sub-Part 1.1.3: Urban renewal in the Nigerian context Part 2 (1.2): Urban Decay and Blight Sub-Part 1.2.1: Definition and indicators of urban decay Sub-Part 1.2.2: Causes of urban blight and deterioration Sub-Part 1.2.3: Identifying blighted areas in Nigerian cities Part 3 (1.3): Housing Needs and the Housing Problem Sub-Part 1.3.1: Definition and dimensions of housing need Sub-Part 1.3.2: Assessing housing need quantitative and qualitative dimensions Sub-Part 1.3.3: The housing deficit in Nigerian cities Part 4 (1.4): Substandard Housing and Slum Formation Sub-Part 1.4.1: Characteristics of substandard housing Sub-Part 1.4.2: Processes and causes of slum formation Sub-Part 1.4.3: Slums and informal settlements in Nigeria Introduction Cities are living organisms. They grow, change, age, and without deliberate intervention decline. Across the world, the older and inner areas of cities that were once vibrant centres of commerce and residential life have in many cases deteriorated into zones of physical decay, overcrowding, inadequate services, and social deprivation. Addressing this deterioration renewing what has decayed, improving what is substandard, and meeting the
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS housing needs of growing urban populations is the central preoccupation of urban renewal practice. The aim of this Series is to equip you with the knowledge and skills to define urban renewal, explain the concepts of urban decay and blight, describe the dimensions of housing need, and analyse the formation and characteristics of slums and substandard housing in Nigerian cities. We shall commence this Series by introducing the concept, definitions, and historical evolution of urban renewal. Next, we will examine urban decay and blight what they are, what causes them, and how they are identified in Nigerian cities. Following that, we will explore the concept of housing need, including both its quantitative and qualitative dimensions and the scale of Nigeria's housing deficit. Finally, we will wrap up by examining the characteristics of substandard housing and the processes through which slums form and persist in Nigerian cities. Series Learning Outcomes Upon completing this Series, you should be able to: SLO 1.1 define urban renewal and describe its historical evolution and Nigerian context, SLO 1.2 explain the concept of urban blight, its indicators, causes, and identification in Nigerian cities, SLO 1.3 describe the dimensions of housing need and assess the scale of Nigeria's housing deficit, SLO 1.4 identify the characteristics of substandard housing and analyse the causes and processes of slum formation. 1.1 Concepts and Definitions of Urban Renewal 1.1.1 Definition and scope of urban renewal Urban renewal is a planned process of improving the physical, social, economic, and environmental conditions of deteriorated or declining areas within a city. It encompasses a range of interventions from the rehabilitation of individual buildings to the comprehensive redevelopment of large neighbourhoods aimed at restoring functionality, improving living standards, and enhancing the productive capacity of urban areas. Urban renewal is distinct from urban development on the fringe or in greenfield areas: it operates within the existing fabric of the city, working with and sometimes against what is already there. Its scope therefore extends beyond physical construction to include tenure reform, community engagement, economic revitalisation, and institutional capacity building. Fill in the blank: Urban renewal is distinct from greenfield development because it operates within the existing __________ of the city.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Short description: Image showing a before-and-after comparison of an urban area that has undergone renewal, contrasting deteriorated buildings with the renewed streetscape. Plate 1.1 Before and after urban renewal a transformed urban area 1.1.2 Historical evolution of urban renewal practice The practice of urban renewal has evolved significantly since the nineteenth century. Early efforts in Europe and North America focused on slum clearance the wholesale demolition of deteriorated areas driven by public health concerns and the belief that physical renewal required the elimination of existing fabric. The post-World War II era saw large-scale redevelopment schemes in Western cities, often displacing poor communities to make way for highways, offices, and public housing. By the 1960s and 1970s, the social costs of clearance-based renewal prompted a shift towards rehabilitation and conservation approaches that sought to improve
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS existing buildings and retain communities. Contemporary urban renewal practice emphasises community participation, mixed-use development, and incremental upgrading rather than wholesale redevelopment. Fill in the blank: By the 1960s, the social costs of clearance-based renewal prompted a shift towards rehabilitation and __________ approaches. 1.1.3 Urban renewal in the Nigerian context Urban renewal in Nigeria has a complex history shaped by colonial planning, rapid post-independence urbanisation, and the particular challenges of managing rapidly growing cities with limited resources. Colonial urban planning in Nigerian cities introduced racial spatial segregation and neglected African residential areas, creating the preconditions for today's decay. Post-independence renewal efforts have included slum clearance schemes in Lagos, Port Harcourt, and other major cities, often displacing communities without adequate resettlement provision. More recently, the Urban Renewal Programme has been pursued at federal and state levels, though implementation has been uneven. The challenge in Nigeria is to design renewal processes that address physical deterioration without exacerbating social dislocation or deepening urban poverty. Fill in the blank: The challenge of urban renewal in Nigeria is to address physical deterioration without exacerbating social __________ or deepening urban poverty. Pilot questions 1.1 Which of the following best defines urban renewal? What was the primary approach to urban renewal in the early twentieth century? Which of the following is not a characteristic of contemporary urban renewal? Fill in the blank: Urban renewal in Nigeria has been shaped by colonial planning, rapid urbanisation, and the challenges of managing cities with limited __________. 1.2 Urban Decay and Blight 1.2.1 Definition and indicators of urban decay Urban decay refers to the process by which a previously functioning urban area deteriorates in physical condition, economic vitality, and social wellbeing. Urban blight is the condition of advanced decay in which an area has deteriorated to a point where it constitutes a hazard or a drag on surrounding neighbourhoods. The indicators of urban decay include: dilapidated or abandoned buildings; overcrowding and high residential densities without adequate amenities; inadequate or broken-down infrastructure including roads, drainage, water supply, and sanitation; high vacancy rates or conversely extreme overcrowding; environmental degradation including open dumpsites and waterlogging; and social indicators such as high crime rates, unemployment, and poverty concentration. Fill in the blank: Urban blight is the condition of advanced decay in which an area has deteriorated to a point where it constitutes a __________ to surrounding neighbourhoods.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Short description: Diagram showing the indicators of urban decay and blight including physical, economic, environmental, and social dimensions. Figure 1.1 Indicators of urban decay and blight 1.2.2 Causes of urban blight and deterioration Urban blight has multiple, interacting causes. Physical causes include ageing building stock, deferred maintenance, and the obsolescence of building types that no longer meet contemporary functional requirements. Economic causes include disinvestment as profitable uses relocate to newer areas, declining land values in inner-city zones, and the concentration of low-income residents unable to maintain properties. Institutional causes include inadequate planning enforcement, absence of property maintenance regulations, and weak local government capacity. Social causes include population loss from formerly dense areas, the concentration of
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS disadvantaged groups, and the breakdown of community social capital. In Nigerian cities, all these causes operate simultaneously, compounded by rapid population growth and chronic underinvestment in urban infrastructure. Fill in the blank: Institutional causes of urban blight include inadequate planning enforcement and weak local government __________. 1.2.3 Identifying blighted areas in Nigerian cities The identification of blighted areas for renewal intervention requires systematic area assessment using both quantitative data and field observation. Key assessment criteria include the proportion of buildings in disrepair, the ratio of persons per room, access to piped water and sewerage, road condition, and the prevalence of open dumpsites. In Nigeria, areas such as Isale-Eko and Ajegunle in Lagos, Sabon Gari in Kano, and older residential zones in Ibadan, Port Harcourt, and Benin City have been identified as priority areas for urban renewal. Effective identification requires participatory engagement with residents alongside technical surveys to ensure that renewal priorities
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