Abstract
In developing countries, informal settlements are mainly located in floodplains and wetlands; hence, they are frequently affected by floods. The objective of this study is to demonstrate a methodological approach that integrates the community members’ local and indigenous knowledge and GIS-based multi-criteria decision-making using the Analytic Network Process in mapping flood vulnerability in an informal settlement. The study was conducted in Quarry Road West informal settlement located in Durban, South Africa. A mixed-method approach that involved a household survey (n = 359), interviews with key informants (n = 10) and focus group discussions (n = 2) was used in this study. This study’s results showed a spatial differentiation of flood vulnerability in the study area. Households along the Palmiet River were highly vulnerable to flooding. A section of the settlement called Mcondo 1 was also highly vulnerable to flooding while maMsuthu had low flood vulnerability. The sensitivity analysis results showed that changing the indicator weights, correspondingly, affected the output of the flood vulnerability map. Therefore, this study can guide decision-makers on how to elicit adequate community participation and comprehensively integrate local and indigenous knowledge with Geographical Information System in mapping flood vulnerability in informal settlements.
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Membele, G.M., Naidu, M. & Mutanga, O. Application of analytic network process (ANP), local and indigenous knowledge in mapping flood vulnerability in an informal settlement. Nat Hazards 120, 2929–2951 (2024). https://doi.org/10.1007/s11069-023-06313-2
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DOI: https://doi.org/10.1007/s11069-023-06313-2