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Land Use and Land Cover (LULC) classes in Ogbaru Local Government Area of Anambra State, Nigeria Christian, Iguocha Arinze
International Journal of Education, Information Technology, and Others Vol 8 No 1 (2025): International Journal of Education, information technology   and others
Publisher : Peneliti.net

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Abstract

Land Use and Land Cover (LULC) classification plays a critical role in understanding the dynamics of environmental change and its impact on land resources. The evolution of these land cover types is essential for assessing the region's land management strategies, agricultural productivity, and environmental conservation. This study investigates the Land Use and Land Cover (LULC) classes in Ogbaru Local Government Area (LGA) of Anambra State, Nigeria, using satellite imagery to analyze spatial and temporal changes from 1986 to 2020. This study explores Land Use and Land Cover (LULC) classes in Ogbaru Local Government Area (LGA) using both primary and secondary data sources. The area, with a population of 261,018 as of 2010, is characterized by tropical climate, agriculture, and fishing. Primary data were collected through GPS-based field surveys for ground-truthing, while secondary data were derived from LANDSAT imagery (1980, 2000, 2020) with 30-meter spatial resolution. Image pre-processing was conducted, and supervised classification using the Maximum Likelihood Classification (MLC) method was applied for LULC classification. Pearson’s correlation analysis was utilized to explore the relationship between LULC and land surface temperature. Five distinct LULC classes were identified: Forested Areas, Urban Surfaces, Bare Surfaces, Light Vegetation, and Water Bodies. The study utilized LANDSAT satellite data to assess the dynamics of these classes over a 34-year period. Results show a significant shift in land cover, with urban areas increasing from 1% of the total land area in 1986 to 5% in 2020, reflecting the impact of urbanization and infrastructural development. Conversely, forested areas decreased substantially, while light vegetation initially increased but later declined. Water bodies experienced minor changes, while bare surfaces showed a gradual rise, especially between 1986 and 2002. These findings highlight the rapid urbanization and the corresponding decline in natural vegetation, underscoring the need for sustainable land management strategies to balance development with environmental preservation in Ogbaru. The study demonstrates the utility of satellite imagery in monitoring LULC changes for effective urban planning and resource management.
Land Surface Temperature (LST) Distribution Across Ogbaru Local Government Area of Anambra State Christian, Iguocha Arinze
Research in Science and Mathematics Education Vol. 2 No. 1 (2025): RISEME APRIL 2025
Publisher : Piramida Akademi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62385/riseme.v2i1.156

Abstract

Purpose – Land Surface Temperature (LST) is a key parameter in understanding the thermal dynamics of any given area, serving as an important indicator for assessing urban heat islands, climate change, and land use patterns. This study investigates the distribution of LST across Ogbaru Local Government Area (LGA) of Anambra State, Nigeria, utilizing remote sensing technology and Geographic Information System (GIS) to assess spatial and temporal trends between 1986 and 2020. The research utilizes secondary data, including LANDSAT imagery from 1980, 2000, and 2020, shapefiles, and Google Earth maps for visual interpretation. Method - Data was further validated through field surveys using GPS and ground-truthing methods. The study also used LANDSAT’s Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+), and Operational Land Imager (OLI) for LST estimation Pearson’s Product Moment Correlation was applied to analyze the relationship between land use/cover and LST across the region. Results - The results reveal a significant rise in LST over the study period, with temperatures in 1986 ranging from 19.4°C to 33.3°C, increasing to temperatures between 22.3°C and 38.7°C by 2002, and reaching 24.4°C to 34°C by 2020. The increase in those temperatures was primarily attributed to urbanization, land use changes, and the expansion of impervious surfaces, particularly in the northern and urbanized parts of Ogbaru, including the proximity to Onitsha. The study also highlights the regional disparity in LST, with higher temperatures in built-up areas and lower temperatures in vegetated zones. Findings -These trends emphasize the growing influence of urban development on local temperature variations and underline the importance of sustainable land use planning and climate adaptation strategies to mitigate the effects of urban heat islands in Ogbaru LGA and similar areas.