Examining flood vulnerability mapping approaches in developing countries: A scoping review

Application of Analytic Network Process (ANP), Local and Indigenous Knowledge in mapping flood vulnerability in an informal settlement

“…Notwithstanding the locational advantage of Quarry Road West to economic opportunities for the residents (Mazeka et al, 2019), this situation (pockets of low ood vulnerability) could explain why some residents went back to the informal settlement despite them having been relocated to an area called Parkgate which had better housing. Furthermore, one of the main reasons why Mcondo 1 was highly vulnerable to ooding is that the section is close to the M19 bridge, and when the calvets under the bridge got blocked due to the accumulation of waste, the water easily found its way to The lack of accurate and updated spatial data has also been identi ed to negatively affect the validation of ood vulnerability maps in developing countries (Membele et al, 2022a). In this study, the 1:100 years ood line and two community members using their local and indigenous knowledge of ood in the informal settlement validated the nal ood vulnerability map.…”

“…A review of literature conducted by Membele et al (2022a) shows that there has been a shift in the way ood vulnerability is considered in developing countries. Flood vulnerability is widely been considered to be integrated because it combines both physical and social vulnerability (Cutter et al, 2003;Ehsan et al, 2022;Paul & Routray, 2010).…”

“…Integrated ood vulnerability is important because it takes a holistic and interdisciplinary approach crucial in facilitating a complete assessment of ood vulnerability (Barroca et al, 2006). Flood vulnerability is therefore considered as an interrelationship of exposure, sensitivity or However, the use of local and indigenous knowledge in mapping ood vulnerability especially in informal settlements remains underutilised (Dube & Munsaka, 2018;Membele et al, 2021Membele et al, , 2022a, mainly because some practitioners argue that local and indigenous knowledge cannot be scienti cally validated. Chanza and De Wit (2016) contend that community members' situational and experiential knowledge is crucial in mapping ood vulnerability at a local level.…”

“…According toFerretti and Montibeller (2016) conducting a sensitivity analysis in mapping, ood vulnerability increased the transparency of the results. However, sensitivity analysis was lacking in most studies that mapped ood vulnerability in developing countries(Membele et al, 2021(Membele et al, , 2022a. After conducting a sensitivity analysis, this study found that assigning positive values to adaptive capacity indicators (initially assigned negative values) and assigning equal weights to all indicators changed the output of the ood vulnerability maps.…”

“…Community members' indicator weights and weights generated using ANP overcome the unavailability of high-resolution spatial data in the informal settlement(Hoque et al, 2019;Kienberger, 2012;Membele et al, 2022a).…”