Spatio-temporal assessment of land use/land cover changes in onitsha, anambra state, south-eastern, nigeria: a comparative study of 2017 and 2024. DOI

Desmond Onyedika Okoye

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Abstract Land use and land cover in Onitsha, Anambra State, experienced substantial transformation between 2017 2024, driven by rapid urban expansion. Using Sentinel-2 satellite imagery ESRI Cover Explorer data, this study assessed spatial temporal changes across seven LULC categories: built-up area, trees, rangeland, cropland, water bodies, bare ground, flooded vegetation. Built-up increased from 35.17 km² (66.47%) to 41.67 (78.76%) recording a net gain of 12.29%. Tree declined sharply 4.43 (8.38%) 0.16 (0.31%), reflecting an 8.07% loss, while rangeland dropped 3.7%, ground 1.2%, vegetation 0.05%. Cropland showed marginal increase 0.62%, bodies remained largely stable with 0.11% gain. Change detection through post-classification comparison transition matrices confirmed that expansion occurred primarily at the expense vegetated undeveloped lands. Accuracy assessments produced overall classification accuracies exceeding 85%, validating reliability results. The environmental consequences shift include elevated surface temperatures, flood risk, biodiversity reduced air quality. These impacts are closely linked public health outcomes such as respiratory illnesses heat stress, particularly high-density zones. Recommendations integration tree planting green infrastructure into planning, enforcement zoning regulations, removal old dilapidated buildings for conversion ecological buffers. A participatory geospatial monitoring framework is also proposed, using open-access data mobile tools engage local communities tracking changes. This offers replicable methodology free, high-resolution datasets. results provide critical insights sustainable management policy supporting climate adaptation, protection, achievement Sustainable Development Goals 11, 13, 15. By combining analysis actionable strategies, contributes development resilient, livable, ecologically balanced cities Nigeria.

Language: Английский

Dynamics of Ecosystem Services Driven by Land Use Change Under Natural and Anthropogenic Driving Trajectories in the Kaduna River Basin, Nigeria DOI Creative Commons
Liehui Zhi, Usman Abdullahi, Qingyue Zhang

et al.

Land, Journal Year: 2025, Volume and Issue: 14(4), P. 706 - 706

Published: March 26, 2025

Land use changes under natural and anthropogenic driving factors have spatiotemporal ecological consequences, these need to be identified protect biodiversity the robustness of ecosystems. While factor research has mainly focused on impacts univariate statistical correlation, analysis compound correspondence between dynamic characteristics function evolution processes been ignored. On basis land change, ecosystem services process trajectories were linked characterized in this study. In Kaduna River Basin (KRB), Nigeria, an important river basin country, change during 2000–2020 caused by both significantly changed services. The single 1.3 times greater than 2.02 trajectories. Carbon storage increased 15.6% (8.5 × 106 t) is growing at a decreasing rate, whereas urbanization reverse succession are main drivers carbon stock decline. Water yield steadily but threatened decline induced restoration, succession, urbanization. Habitat quality initially (0.03) then decreased (0.01), with reclamation being its degradation throughout study period. This integrates use, processes, into cohesive analytical framework, thereby overcoming limitations previous that examined conjunction each other two elements separately. New developments methodological steps watershed management can indicate directions reconcile mitigate conflict socioeconomic growth improved functioning

Language: Английский

Citations

0
Exploring the spatial effects of rapid urbanization on land use efficiency in China under Low-Carbon constraints DOI

Chuanjian Yi,

Bo Xu,

Xiaoyan Shi

et al.

Ecological Indicators, Journal Year: 2025, Volume and Issue: 174, P. 113442 - 113442

Published: April 12, 2025

Language: Английский

Citations

0
Spatio-temporal assessment of land use/land cover changes in onitsha, anambra state, south-eastern, nigeria: a comparative study of 2017 and 2024. DOI

Desmond Onyedika Okoye

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Abstract Land use and land cover in Onitsha, Anambra State, experienced substantial transformation between 2017 2024, driven by rapid urban expansion. Using Sentinel-2 satellite imagery ESRI Cover Explorer data, this study assessed spatial temporal changes across seven LULC categories: built-up area, trees, rangeland, cropland, water bodies, bare ground, flooded vegetation. Built-up increased from 35.17 km² (66.47%) to 41.67 (78.76%) recording a net gain of 12.29%. Tree declined sharply 4.43 (8.38%) 0.16 (0.31%), reflecting an 8.07% loss, while rangeland dropped 3.7%, ground 1.2%, vegetation 0.05%. Cropland showed marginal increase 0.62%, bodies remained largely stable with 0.11% gain. Change detection through post-classification comparison transition matrices confirmed that expansion occurred primarily at the expense vegetated undeveloped lands. Accuracy assessments produced overall classification accuracies exceeding 85%, validating reliability results. The environmental consequences shift include elevated surface temperatures, flood risk, biodiversity reduced air quality. These impacts are closely linked public health outcomes such as respiratory illnesses heat stress, particularly high-density zones. Recommendations integration tree planting green infrastructure into planning, enforcement zoning regulations, removal old dilapidated buildings for conversion ecological buffers. A participatory geospatial monitoring framework is also proposed, using open-access data mobile tools engage local communities tracking changes. This offers replicable methodology free, high-resolution datasets. results provide critical insights sustainable management policy supporting climate adaptation, protection, achievement Sustainable Development Goals 11, 13, 15. By combining analysis actionable strategies, contributes development resilient, livable, ecologically balanced cities Nigeria.

Language: Английский

Citations

0