Increased flooded area and exposure in the White Volta river basin in Western Africa, identified from multi-source remote sensing data.

ABSTRACT: Accurate information on flood extent and exposure is critical for disaster management in data-scarce, vulnerable regions, such as Sub-Saharan Africa (SSA). However, uncertainties in flood extent affect flood exposure estimates. This study developed a framework to examine the spatiotemporal pattern of floods and to assess flood exposure through utilization of satellite images, ground-based participatory mapping of flood extent, and socio-economic data. Drawing on a case study in the White Volta basin in Western Africa, our results showed that synergetic use of multi-temporal radar and optical satellite data improved flood mapping accuracy (77% overall agreement compared with participatory mapping outputs), in comparison with existing global flood datasets (43% overall agreement for the mode

SUBMITTER: Li C 

PROVIDER: S-EPMC8904518 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature