Abstract
Coastal erosion and accretion have emerged as a significant geological and environmental concern to numerous coastal communities of the Niger Delta. To investigate these phenomena, this study utilized Landsat imagery data from the United States Geological Survey (USGS) and geospatial technique (ArcGIS 10.6) for the data analysis. This research is particularly focused on the coastline dynamics in Sagbama communities over a span of 30 years (from 1991 to 2021). The results show that during the 1991-2001 period, approximately 8.88km2 of the coastal area experienced erosion, while 12.01km2 underwent accretion. Moving to 2001-2011, the erosion rate was 8.18km2 , with 16.47km2 of accretion observed during the same time frame. Subsequently, from 2011 to 2021, the erosion-affected area decreased to 7.71km2 , accompanied by 8.29km2 of accretion. The study’s findings bear significant implications for policymakers and environmentalists, offering vital insights to devise effective strategies for mitigating erosion and fostering sustainable land use practices. Understanding the patterns of erosion and accretion is crucial for developing measures to safeguard coastal communities and their ecosystems in the face of ongoing environmental changes.
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