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Urban Rainwater Harvesting Adoption Potential in a Socio-economically Diverse City Using a GIS-based Multi-criteria Decision Method

Author

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  • Annah Ndeketeya

    (University of Johannesburg)

  • Morgan Dundu

    (University of Johannesburg)

Abstract

Rainwater harvesting (RWH) remains an underutilized practice in developing cities, despite its promising potential to supplement available water resources. Socio-economic factors such as capital and household characteristics have been identified as major constraints to the adoption of RWH. Therefore, the purpose of this study is to investigate the extent to which various socio-economic factors influence the potential adoption of RWH in the City of Johannesburg (CoJ). The study employs a Multi-Criteria Decision Analysis (MCDA) approach in ArcMap to run two scenarios, one with socio-economic criteria and the other without. Inputs considered include income and size of the household, tenure-ship and sanitation type. Suitability maps show that more than 50% of the area in the CoJ is suitable for RWH. Further analysis was performed to find the variation in land use, which was categorized into four suitability scales: not suitable, low suitability, medium suitability and high suitability. The results indicate that excluding social and economic criterions leads to overestimating the high suitability category. Findings show the great potential of RWH systems in institutional, business and agricultural properties. Therefore, promoting RWH at the property level is recommended, supported by smart policies to boost its adoption.

Suggested Citation

  • Annah Ndeketeya & Morgan Dundu, 2023. "Urban Rainwater Harvesting Adoption Potential in a Socio-economically Diverse City Using a GIS-based Multi-criteria Decision Method," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(2), pages 835-850, January.
    • Handle: RePEc:spr:waterr:v:37:y:2023:i:2:d:10.1007_s11269-022-03407-7
    DOI: 10.1007/s11269-022-03407-7
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    References listed on IDEAS

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    1. Arnaud Reynaud & Marc Pons & Cristina Pesado, 2018. "Household Water Demand in Andorra: Impact of Individual Metering and Seasonality," Post-Print hal-01891747, HAL.
    2. Chidozie Charles Nnaji & PraiseGod Chidozie Emenike & Imokhai Theophilus Tenebe, 2017. "An Optimization Approach for Assessing the Reliability of Rainwater Harvesting," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(6), pages 2011-2024, April.
    3. Akroush, Samia & Dehehibi, Boubaker & Dessalegn, Bezaiet & Al-Hadidi, Omamah & Abo-Roman, Malek, 2017. "Factors Affecting the Adoption of Water Harvesting Technologies: A Case Study of Jordanian Arid Area," Sustainable Agriculture Research, Canadian Center of Science and Education, vol. 6(1), February.
    4. Arden Finn, 2015. "A National Minimum Wage in the Context of the South African Labour Market," SALDRU Working Papers 153, Southern Africa Labour and Development Research Unit, University of Cape Town.
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