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A Decision-Making Tool for Urban Planners: A Framework to Model the Interdependency among Land Use, Accessibility, Density, and Surface Runoff in Urban Areas

Author

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  • Samith Madusanka

    (Urban Simulation Lab, Department of Town and Country Planning, University of Moratuwa, Moratuwa 10400, Sri Lanka)

  • Chethika Abenayake

    (Department of Town and Country Planning, University of Moratuwa, Moratuwa 10400, Sri Lanka)

  • Amila Jayasinghe

    (Department of Town and Country Planning, University of Moratuwa, Moratuwa 10400, Sri Lanka)

  • Chaminda Perera

    (Department of Town and Country Planning, University of Moratuwa, Moratuwa 10400, Sri Lanka)

Abstract

The purpose of this study was to evaluate the four-dimensional relationship between land use, accessibility, density, and surface runoff in urban areas. In contemporary literature, a series of studies have been conducted that extensively discuss the natural components associated with the surface runoff in urban areas. However, the dynamic and complex dimensions of the urban form, such as land use, accessibility, and density, are yet to be fully understood. In this study, a 4D diagram was utilized to identify relationships between dimensions, in addition to decision tree analysis, to explore the structural flow between selected variables. Furthermore, a structural equation modeling (SEM) approach was employed with the purpose of investigating the direct, indirect, and moderating effects on the targeted dependent variable, surface runoff. The results of the analysis reported a strong correlation between land use, accessibility, density, and surface runoff, with an R-squared value of 0.802, which indicates an acceptable model accuracy by the international standard. A positive relationship between the four dimensions was indicated by the higher accessibility; the higher density in terms of a higher floor space index (FSI), ground space index (GSI), and open space; the building height of the adjacent buildings; the higher diversity of the land use; and the higher surface runoff. Accordingly, the findings of the study offer policy implications in the fields of land use planning, zoning regulations and overall urban development planning towards achieving climate resilient cities.

Suggested Citation

  • Samith Madusanka & Chethika Abenayake & Amila Jayasinghe & Chaminda Perera, 2022. "A Decision-Making Tool for Urban Planners: A Framework to Model the Interdependency among Land Use, Accessibility, Density, and Surface Runoff in Urban Areas," Sustainability, MDPI, vol. 14(1), pages 1-19, January.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:1:p:522-:d:717403
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    References listed on IDEAS

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    4. Qingyu Huang & Jun Wang & Mengya Li & Moli Fei & Jungang Dong, 2017. "Modeling the influence of urbanization on urban pluvial flooding: a scenario-based case study in Shanghai, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 87(2), pages 1035-1055, June.
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