Assessment of Land Use Changes and Impacts of Dam Construction on the Mbaa River, Ikeduru, Nigeria

Cascade damming can shape land surfaces; however, little is known about the specific impacts of dam construction on watershed land cover changes. Therefore, we developed a framework in which remote sensing, transition patterns, and landscape metrics were coupled to measure the impact of dam construction on watershed land cover changes and landscape patterns in the Longmen–Su (L–S) Creek, a small headwater watershed in Southeast China. During the transition and post-impact periods of dam construction, the land cover in the L–S Creek watershed underwent dynamic changes within the affected area. Changes in land cover were dominated by a surge in water and buildup and a decrease in woodland and cropland areas; bareland also increased steadily during construction. Woodlands and croplands were mainly flooded into water areas, although some were converted to bareland and built-up areas owing to the combined impact of dam construction and urbanization. By linking land cover changes with landscape patterns, we found that land use changes in water were significantly associated with landscape fragmentation and heterogeneity in the impacted zone. Our research demonstrates how damming can change land cover locally and may provide a basis for sustainable land management within the context of the extensive development of cascade hydropower dams.

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Linking Land Cover Change with Landscape Pattern Dynamics Induced by Damming in a Small Watershed

Xie

Liu²,

Huang

et al. 2022

Remote Sensing

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Assessment of Land Use Changes and Impacts of Dam Construction on the Mbaa River, Ikeduru, Nigeria

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Linking Land Cover Change with Landscape Pattern Dynamics Induced by Damming in a Small Watershed

Linking Land Cover Change with Landscape Pattern Dynamics Induced by Damming in a Small Watershed

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