Determination of Land Use, Drainage, and Elevation Map of Lower River Ogun, South-Western, Nigeria, Using GIS and Remote Sensing
Authors: Adeyokunnu, A.T.
DOI Info: http://doi.org/10.5281/zenodo.18061554
ABSTRACT
This study utilizes Geographic Information System (GIS) and remote sensing techniques to analyze land cover and land use patterns in the Lower River Ogun basin. The primary objectives were to generate land use and elevation maps using ArcGIS 10.3 and Landsat images from 1998, 2003, 2008, 2013 and 2018. The methodology involved georeferencing, overlaying, and classifying the images into five (5) distinct land use and land cover categories. The results indicate that population growth and human development significantly impact land use pattern in Abeokuta. The analysis revealed notable changes in land use dynamics, with vegetation exhibiting the highest gain and loss (24.73 km2), followed by rock (17.53 km2), and settlement (16.56 km2). Conversely, the bare surface and water body experienced net changes of 2.50 km2 and 1.47 km2, respectively. The elevation map shows a range of 5 – 197 meters above sea level. The study concludes that the land use and land cover of the Lower River Ogun basin have undergone significant changes, with a 43.83% increase in settlement and a 17.10% reduction in water bodies. These findings can help to identify areas prone to flooding and inform flood risk management strategies.
Affiliations: Department of Civil Engineering, Ajayi Crowther University, Oyo, Oyo State, Nigeria.
Keywords: Land Use, Elevation Map, Lower River Ogun, Remote Sensing, Geographical Information System
Published date: 2025/12/30
