marvinsakali/Flood-Extent-Mapping-And-Damage-Assessment-Tana-River-Kenya

Flood extent mapping and damage assessment along the Tana River in Kenya during the April - May flooding in 2024. # Flood-Extent-Mapping-And-Damage-Assessment-Tana-River-Kenya ## Abstract Kenya experienced severe flooding between mid-April and May 2024, resulting in loss of life, property damage, and displacement. This disaster was driven by continuous rainfall and river and dam overflows (OCHA, 2024). To analyze the flood extent along the Tana River, one of the impacted regions, I utilized Sentinel-1 images from April. These images were pre-processed and analyzed to delineate the flood extent and identify permanent water bodies, using the Global Surface Water. A preliminary damage assessment was conducted by integrating the flood extent layer with land cover data . The flood mapping and damage assessment were performed using Google Earth Engine's javascript API , and the resulting layers were exported to QGIS for final map creation. The analysis revealed that shrubland and cropland were the most affected land cover types. These findings highlight the flood's substantial impact on local communities, including displacement, loss of livelihoods and biodiversity, and disruption of economic activities. This study underscores the utility of GIS technologies for rapid disaster response and planning, leveraging freely available datasets. Geospatial technologies play a vital role in disaster management by providing timely information about affected populations and land cover, aiding in search and rescue operations, and supporting effective post-disaster compensation and assistance. ## Workflow ## Results Snippets ## DISCUSSIONS The flood analysis for the Tana River region in April 2024 indicated that approximately 14 square kilometers were inundated. The areas primarily affected by the flooding included scrubland, tree cover, and cropland. This extensive flooding had significant implications for the local environment, economy, and communities. ## Conclusion The 2024 Tana River flood highlights the importance of proactive disaster management and the use of geospatial technologie …