Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China
Study region: The karst plateau region in Southwest China. Study focus: Global warming has increased the frequency and intensity of extreme rainfall events, exacerbating soil erosion. Traditional assessment methods using daily, monthly, or annual data struggle to capture individual rainfall impacts,...
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Elsevier
2025-08-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221458182500415X |
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| author | Youjin Yan Xin Wang Zeyin Hu Xiaojin Xu Quanhou Dai Lina Mei Fengling Gan Huifang Jin Liangjie Wang Chenyang Huang |
| author_facet | Youjin Yan Xin Wang Zeyin Hu Xiaojin Xu Quanhou Dai Lina Mei Fengling Gan Huifang Jin Liangjie Wang Chenyang Huang |
| author_sort | Youjin Yan |
| collection | DOAJ |
| description | Study region: The karst plateau region in Southwest China. Study focus: Global warming has increased the frequency and intensity of extreme rainfall events, exacerbating soil erosion. Traditional assessment methods using daily, monthly, or annual data struggle to capture individual rainfall impacts, especially in regions with frequent extreme rainfall due to global warming. This study used high-resolution satellite data to analyze extreme sub-hourly rainfall erosivity in karst plateau areas. New hydrological insights for the region: The results indicate that sub-hourly rainfall scales accurately reflect the temporal dynamics of rainfall events. In the study area, 95 % of the events fell below the critical soil erosion threshold (30 mm·h−1), suggesting that traditional cumulative rainfall scales may overestimate erosivity compared to the impact of high-intensity, short-duration events captured at the sub-hourly level. High-erosivity regions have experienced decelerating increases, whereas low-erosivity regions have seen significant rises. After 2014, the annual maximum rainfall erosivity shifted from a significant decreasing trend to an increasing state accompanied by a shortening peak periodicity. Maximum annual rainfall erosivity occurs in spring (May), while the erosive rainfall events in winter are increasing in intensity. Consequently, low-erosivity regions and winter rainfall events pose a rising risk of soil erosion. This study provides a scientific basis for targeted erosion control measures, emphasizing the need for enhanced monitoring, early warning systems, and soil and water conservation to effectively address the challenges posed by rainfall erosion. |
| format | Article |
| id | doaj-art-7bdfae073e1a4c5197580b6f7dd24a5e |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-7bdfae073e1a4c5197580b6f7dd24a5e2025-08-20T03:25:27ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-08-016010259010.1016/j.ejrh.2025.102590Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in ChinaYoujin Yan0Xin Wang1Zeyin Hu2Xiaojin Xu3Quanhou Dai4Lina Mei5Fengling Gan6Huifang Jin7Liangjie Wang8Chenyang Huang9Co-Innovation Center of Sustainable Forestry in Southern China, Institute of Ecological Civilization Construction and Forestry Development, Nanjing Forestry University, Nanjing 210037, China; Corresponding authors.Co-Innovation Center of Sustainable Forestry in Southern China, Institute of Ecological Civilization Construction and Forestry Development, Nanjing Forestry University, Nanjing 210037, ChinaSchool of Karst Science, Guizhou Normal University, Guiyang 550001, ChinaInstitute of Soil Erosion and Ecological Restoration, College of Forestry, Guizhou University, Guiyang, 550025, ChinaInstitute of Soil Erosion and Ecological Restoration, College of Forestry, Guizhou University, Guiyang, 550025, China; Corresponding authors.Co-Innovation Center of Sustainable Forestry in Southern China, Institute of Ecological Civilization Construction and Forestry Development, Nanjing Forestry University, Nanjing 210037, ChinaInstitute of Soil Erosion and Ecological Restoration, College of Forestry, Guizhou University, Guiyang, 550025, China; Chongqing Key Laboratory of Surface Process and Environment Remote Sensing in the Three Gorges Reservoir Area, School of Geography and Tourism Science, Chongqing Normal University, Chongqing 401331, ChinaCollege of Agriculture, Yangtze University, Jingzhou 434025, ChinaCo-Innovation Center of Sustainable Forestry in Southern China, Institute of Ecological Civilization Construction and Forestry Development, Nanjing Forestry University, Nanjing 210037, ChinaCo-Innovation Center of Sustainable Forestry in Southern China, Institute of Ecological Civilization Construction and Forestry Development, Nanjing Forestry University, Nanjing 210037, ChinaStudy region: The karst plateau region in Southwest China. Study focus: Global warming has increased the frequency and intensity of extreme rainfall events, exacerbating soil erosion. Traditional assessment methods using daily, monthly, or annual data struggle to capture individual rainfall impacts, especially in regions with frequent extreme rainfall due to global warming. This study used high-resolution satellite data to analyze extreme sub-hourly rainfall erosivity in karst plateau areas. New hydrological insights for the region: The results indicate that sub-hourly rainfall scales accurately reflect the temporal dynamics of rainfall events. In the study area, 95 % of the events fell below the critical soil erosion threshold (30 mm·h−1), suggesting that traditional cumulative rainfall scales may overestimate erosivity compared to the impact of high-intensity, short-duration events captured at the sub-hourly level. High-erosivity regions have experienced decelerating increases, whereas low-erosivity regions have seen significant rises. After 2014, the annual maximum rainfall erosivity shifted from a significant decreasing trend to an increasing state accompanied by a shortening peak periodicity. Maximum annual rainfall erosivity occurs in spring (May), while the erosive rainfall events in winter are increasing in intensity. Consequently, low-erosivity regions and winter rainfall events pose a rising risk of soil erosion. This study provides a scientific basis for targeted erosion control measures, emphasizing the need for enhanced monitoring, early warning systems, and soil and water conservation to effectively address the challenges posed by rainfall erosion.http://www.sciencedirect.com/science/article/pii/S221458182500415XSoil erosionExtreme rainfallSub-hourly scaleRainfall erosivityEvolution trend |
| spellingShingle | Youjin Yan Xin Wang Zeyin Hu Xiaojin Xu Quanhou Dai Lina Mei Fengling Gan Huifang Jin Liangjie Wang Chenyang Huang Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China Journal of Hydrology: Regional Studies Soil erosion Extreme rainfall Sub-hourly scale Rainfall erosivity Evolution trend |
| title | Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China |
| title_full | Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China |
| title_fullStr | Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China |
| title_full_unstemmed | Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China |
| title_short | Exploring the spatiotemporal trends of extreme sub-hourly rainfall erosivity: Insights from karst plateaus in China |
| title_sort | exploring the spatiotemporal trends of extreme sub hourly rainfall erosivity insights from karst plateaus in china |
| topic | Soil erosion Extreme rainfall Sub-hourly scale Rainfall erosivity Evolution trend |
| url | http://www.sciencedirect.com/science/article/pii/S221458182500415X |
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