Characterizing the level of urban Flood vulnerability using the social-ecological-technological systems framework, the case of Adama city, Ethiopia

Bikila Merga Leta; Dagnachew Adugna

doi:10.1016/j.heliyon.2023.e20723

Characterizing the level of urban Flood vulnerability using the social-ecological-technological systems framework, the case of Adama city, Ethiopia

Heliyon. 2023 Oct 6;9(10):e20723. doi: 10.1016/j.heliyon.2023.e20723. eCollection 2023 Oct.

Authors

Bikila Merga Leta^{1

2}, Dagnachew Adugna¹

Affiliations

¹ Ethiopian Institute of Architecture, Building Construction & City Development, Addis Ababa University, Addis Ababa, Ethiopia.
² Addis Ababa Science and Technology University, Addis Ababa, Ethiopia.

Abstract

This study characterizes the flood vulnerability of Adama City, Ethiopia, where the city faces high flood vulnerability due to its unplanned urbanization in low-lying floodplain areas surrounding deforested mountains and ridges. The study applied an interlinked Social-Ecological-Technological-Systems (SETS) vulnerability framework using a GIS-based Multi-Criteria Decision-Making and Analytical Hierarchy Process (MCDM-AHP). The framework analyzed exposure, sensitivity, and adaptive capacity to flooding for each of the three SETS domains. The study analyzed 18 variables at the city level within each SETS domain. The result revealed that clusters of flood-vulnerable areas were identified by each SETS domain showing the concentration of flood vulnerability in the study area and the need to consider prompt adaptive mechanisms to severe and recurring flooding. The finding has significant implications for holistic approaches to sustainable cities. Moreover, the reduction of complex urban flood vulnerabilities according to their priority as individual or combined solutions for decision-makers and professionals in early warning and flood management systems is the other contribution of the study.

Keywords: Characterization; GIS; MCDM-AHP; Social-ecological-technological systems.