LAND USE AND LAND COVER OF ANALYSIS OF THE BRIDGED SECTION OF OGBA RIVER
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Abstract
Land use and land cover changes significantly impact environmental sustainability and water
quality. This study aimed to examine spatiotemporal variations in land use and assess selected physicochemical attributes of a bridged section of Ogba river in Benin City, Nigeria. Landsat satellite imagery from 1990, 2001, 2012, and 2023 was processed using ENVI 5.3 software, with classifications categorized into built-up areas, vegetation, barren land, and water bodies. Water quality analysis involved sampling from three points along the Ogba River over three months, testing for pH, turbidity, total dissolved solids (TDS), total suspended solids (TSS), and electrical conductivity (EC). Land use/cover results revealed a decline in vegetation and barren land, while built-up areas increased to 7.122106 km² in 2023. Water quality analysis showed that Point C had the highest TDS values (29.00–45.00 mg/L)
and EC levels (58.00–91.50 µS/cm), with significant differences (P < 0.05), while turbidity
values ranged from 2.50 to 5.00 NTU with no statistical significance (P > 0.05). pH values
ranged from 6.35 to 7.31, showing minor variations across the sampling points. These findings highlight the impact of urban expansion on both land and water resources. It is recommended that urban planning policies incorporate sustainable land management and stricter regulations to mitigate environmental degradation and protect water quality in the region.
quality. This study aimed to examine spatiotemporal variations in land use and assess selected physicochemical attributes of a bridged section of Ogba river in Benin City, Nigeria. Landsat satellite imagery from 1990, 2001, 2012, and 2023 was processed using ENVI 5.3 software, with classifications categorized into built-up areas, vegetation, barren land, and water bodies. Water quality analysis involved sampling from three points along the Ogba River over three months, testing for pH, turbidity, total dissolved solids (TDS), total suspended solids (TSS), and electrical conductivity (EC). Land use/cover results revealed a decline in vegetation and barren land, while built-up areas increased to 7.122106 km² in 2023. Water quality analysis showed that Point C had the highest TDS values (29.00–45.00 mg/L)
and EC levels (58.00–91.50 µS/cm), with significant differences (P < 0.05), while turbidity
values ranged from 2.50 to 5.00 NTU with no statistical significance (P > 0.05). pH values
ranged from 6.35 to 7.31, showing minor variations across the sampling points. These findings highlight the impact of urban expansion on both land and water resources. It is recommended that urban planning policies incorporate sustainable land management and stricter regulations to mitigate environmental degradation and protect water quality in the region.
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