Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes
Study region: Red soil region of southern China Study focus: Land use/cover changes significantly affect the ecosystem’s potential for sediment detachment and transport capacity. These impacts can be manifested through variations in sediment connectivity, which reflects the continuity and strength o...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-06-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581825002320 |
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| author | He Wang Songyang Li Juan Wu Huiguang Li Yue Zhang Fangshi Jiang Yanhe Huang Jinshi Lin |
| author_facet | He Wang Songyang Li Juan Wu Huiguang Li Yue Zhang Fangshi Jiang Yanhe Huang Jinshi Lin |
| author_sort | He Wang |
| collection | DOAJ |
| description | Study region: Red soil region of southern China Study focus: Land use/cover changes significantly affect the ecosystem’s potential for sediment detachment and transport capacity. These impacts can be manifested through variations in sediment connectivity, which reflects the continuity and strength of runoff and sediment pathways at a given point in time. Combining the sediment connectivity index (IC) with observed sediment data, this study assessed the dynamics of structural sediment connectivity and its response to land use/cover changes in a representative watershed of southern China's red soil region. New hydrological insight for the region: Over four decades of soil erosion control, land use and landscape patterns have changed minimally, but the vegetation cover has increased significantly. The mean IC values were −0.88, −0.87 and −3.77 in 1986, 2000 and 2019, respectively, indicating a great decrease in structural sediment connectivity. Croplands and highly fragmented landscape patterns can lead to high IC values. The changes in vegetation cover were the direct cause of IC reduction, which resulted in temporal variations in structural sediment connectivity. These variations aligned chronologically with regional development patterns and policies. Sediment connectivity changes became the main factor controlling sediment yield in the watershed from 2001 to 2020, reducing it by 57.56 % compared to 1982–1995 period. These findings provide spatial guidance for optimizing landscape patterns and cropland management to mitigate sediment connectivity hotspots in red soil regions. |
| format | Article |
| id | doaj-art-360a9dd2212c4b2d9073b2ca107548a1 |
| institution | DOAJ |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-360a9dd2212c4b2d9073b2ca107548a12025-08-20T03:13:04ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-06-015910240710.1016/j.ejrh.2025.102407Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changesHe Wang0Songyang Li1Juan Wu2Huiguang Li3Yue Zhang4Fangshi Jiang5Yanhe Huang6Jinshi Lin7Bureau of Agriculture, Rural Affairs and Water Resources of Tongan, Xiamen 361100, ChinaJinshan Soil and Water Conservation Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaFujian Soil and Water Conservation Experimental Station, Fuzhou 350001, ChinaJinshan Soil and Water Conservation Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaJinshan Soil and Water Conservation Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaJinshan Soil and Water Conservation Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaJinshan Soil and Water Conservation Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, ChinaJinshan Soil and Water Conservation Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Corresponding author.Study region: Red soil region of southern China Study focus: Land use/cover changes significantly affect the ecosystem’s potential for sediment detachment and transport capacity. These impacts can be manifested through variations in sediment connectivity, which reflects the continuity and strength of runoff and sediment pathways at a given point in time. Combining the sediment connectivity index (IC) with observed sediment data, this study assessed the dynamics of structural sediment connectivity and its response to land use/cover changes in a representative watershed of southern China's red soil region. New hydrological insight for the region: Over four decades of soil erosion control, land use and landscape patterns have changed minimally, but the vegetation cover has increased significantly. The mean IC values were −0.88, −0.87 and −3.77 in 1986, 2000 and 2019, respectively, indicating a great decrease in structural sediment connectivity. Croplands and highly fragmented landscape patterns can lead to high IC values. The changes in vegetation cover were the direct cause of IC reduction, which resulted in temporal variations in structural sediment connectivity. These variations aligned chronologically with regional development patterns and policies. Sediment connectivity changes became the main factor controlling sediment yield in the watershed from 2001 to 2020, reducing it by 57.56 % compared to 1982–1995 period. These findings provide spatial guidance for optimizing landscape patterns and cropland management to mitigate sediment connectivity hotspots in red soil regions.http://www.sciencedirect.com/science/article/pii/S2214581825002320Sediment connectivityLand use/coverLandscape patternRed soil region |
| spellingShingle | He Wang Songyang Li Juan Wu Huiguang Li Yue Zhang Fangshi Jiang Yanhe Huang Jinshi Lin Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes Journal of Hydrology: Regional Studies Sediment connectivity Land use/cover Landscape pattern Red soil region |
| title | Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes |
| title_full | Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes |
| title_fullStr | Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes |
| title_full_unstemmed | Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes |
| title_short | Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes |
| title_sort | structural sediment connectivity dynamics in a representative watershed of the southern china s red soil region response to land use cover changes |
| topic | Sediment connectivity Land use/cover Landscape pattern Red soil region |
| url | http://www.sciencedirect.com/science/article/pii/S2214581825002320 |
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