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Odigie, Omorede
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Earth & Planetary Sciences Environmental Science

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Land usage/land cover variation at a bridged section of Ikpoba river in Benin city, mid western Nigeria Obayagbona, Nosa Omoregbe; Odigie, Omorede
Journal of Bioresources and Environmental Sciences Vol 4, No 1 (2025): April 2025
Publisher : BIORE Scientia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/jbes.2024.19936

Abstract

A leading cause of land use and land cover changes is human population growth as well as urbanization. This study aimed at identifying the changes in land use and land cover around a bridged point of Ikpoba River, Benin City, Nigeria, coupled with  the examination of selected physicochemical attributes of surface water samples collected from the river around the bridged section. Land use and land cover change analysis was done using images from Landsat 5 and 7 for the years 1991, 2002, 2012 and 2022 using ENVI 5.3 software. Surface water samples were collected from 3  sampling points  in a three month period; May to July, 2023. The monthly grouped mean data for each sampling point were subjected to one way analysis of variance (ANOVA) and  mean separation was also carried out using  a post hoc test; Duncan’s multiple range test at 95% level of confidence.Land use maps revealed that there was a decrease in the forested areas, grasslands and water bodies and an consequent increase in the barren land as well as  built up areas between the years; 1991 and 2022. There were variations in the mean pH and turbidity values. The range of these parameters were; 5.91± 0.05  to 6.76 ±0.10 and 12.50 ±0.50 to 131.50 ± 3.50 mg/l. The variation in the  mean pH values was insignificant (p>0.05) whilst the difference in the mean turbidity readings was significant (p<0.05). It is recommended that protective measures be implemented to protect the remaining forested areas while encouraging reforestation of barren lands.
Co-Authors Obayagbona, Nosa Omoregbe