GEOSPATIAL ANALYSIS OF THE IMPACT OF OYAN RIVER DAM IN OGUN STATE NIGERIA ON ITS DOWNSTREAM COMMUNITIES
Context and background The Oyan River Dam, located in Ogun State, Nigeria, is a major water infrastructure that provides water for irrigation, domestic, and industrial purposes. Over time, the dam has impacted the downstream communities environmentally and socio-economically, potentially leadin...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
EL-AYACHI
2025-04-01
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| Series: | African Journal on Land Policy and Geospatial Sciences |
| Subjects: | |
| Online Access: | https://revues.imist.ma/index.php/AJLP-GS/article/view/52145 |
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| Summary: | Context and background
The Oyan River Dam, located in Ogun State, Nigeria, is a major water infrastructure that provides water for irrigation, domestic, and industrial purposes. Over time, the dam has impacted the downstream communities environmentally and socio-economically, potentially leading to land use and water quality changes. These impacts call for a comprehensive study to assess the environmental and socio-economic effects of the dam and to propose measures to mitigate its negative consequences.
Goal and Objectives:
The study aims to assess the environmental and socio-economic impacts of the dam and provide information to mitigate its negative effects. It focuses on analyzing land use changes, water quality, and the dam's impact on downstream communities.
Methodology:
• LULC Analysis: Satellite data from 2000, 2010, and 2020 were analyzed using ArcGIS to track changes in built-up areas, water bodies, and vegetation.
• Water Quality: Water clarity was assessed using NDWI and NDTI indices.
• Survey: Questionnaires were distributed to 500 residents to evaluate the dam's environmental and socio-economic impacts.
Results:
• LULC: Built-up areas expanded, vegetation cover declined, and water bodies slightly increased.
• Water Quality: Water clarity deteriorated over time, with increased turbidity.
• Impacts: Environmental issues like biodiversity loss (50%) and water pollution (76%) were reported, along with socio-economic impacts such as agricultural reliance and health problems like waterborne diseases (40%).
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| ISSN: | 2657-2664 |