Institute of Geography and Development Studies
Permanent URI for this collectionhttps://dspace.njala.edu.sl/handle/20.500.144402/147
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Item Impacts of land-use and land-cover change on rural livelihoods: Evidence from eastern Sierra Leone(Elsevier BV, 2022-09-09) Lahai, Morrison KenieItem Drivers of land-use and land-cover change in rural landscapes; a case in Eastern Sierra Leone(Taylor & Francis, 2022-09-28) Lahai, Morrison K.This study provides the first attempt at assessing the drivers of LULC change in eastern Sierra Leone where settlement expansion is as eminent as the proliferation of the primary industrial sector, notably agriculture and artisanal mining. For this purpose, using Landsat images at 1986, 2000 and 2020, LULC maps of the study area were obtained. The principal drivers of LULC change were identified based on field observations and interviews with local residents. Additionally, population and climate data were obtained to better understand LULC changes. Vast changes were observed in Shrub/Fallow, Grass/Cropland, Wetland and Built/Barren. Moderate changes were observed in Trees/Forest and Open Water. The drivers of LULC change are attributable to population growth as the main underlying driver and agricultural expansion and infrastructural development as the main proximate or direct drivers. Moreover, the declining rainfall in tandem with rising temperatures can be linked to the shrinking Wetland and Open Water.Item Land-Use and Land-Cover Change and its Association with Land Degradation in Njaluahun Chiefdom, Eastern Sierra Leone: A Multi-Temporal Landsat Assessment(Sciencedomain International, 2026-10-07) Lansana, SaffaLand-use and land-cover (LULC) change is closely associated with land degradation in rural landscapes of Sierra Leone, yet long-term chiefdom-scale assessments remain limited. This study assessed multi-decadal LULC change in Njaluahun Chiefdom, Kailahun District, using Landsat imagery from 1991, 2001, 2010 and 2021 and examined local perceptions of land degradation through household surveys. Supervised classification distinguished trees/forest, crop/fallow, wetland, open water and built/barren classes within the official 256 km² chiefdom area. Because unclassified/cloud/no-data pixels increased from 0.0 km² in 1991 to 40.0 km² in 2021, trends were also evaluated as percentages of classified pixels. Between 1991 and 2021, trees/forest declined from 67.0 to 21.3 km², wetlands from 54.1 to 16.1 km², and open water from 42.9 to 18.8 km². Over the same period, crop/fallow increased from 40.4 to 78.4 km² and built/barren from 51.6 to 81.4 km². Forest loss was most rapid after 2001. Household interviews with 200 long-term residents indicated that slash-and-burn upland cultivation, over-cropping, deforestation and small-scale mining were perceived as important drivers of land degradation, while knowledge of sustainable management practices remained limited. The combined remote-sensing and community evidence identifies consistent landscape-change patterns while supporting association rather than quantitative causal attribution to individual livelihood activities, thereby supporting more targeted land-use planning decisions.