Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau
The hydrological cycle is anticipated to become increasingly variable due to intensified global climate extremes and frequent floods. Understanding the evolution and driving mechanisms of floods in the context of climatic extremes is essential, particularly on the Loess Plateau (LP) where anthropoge...
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Elsevier
2024-11-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X24012135 |
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| author | Yanli Qin Yaping Wang Qiaoqiao Wang Lijing Fan Qiang Li Fubo Zhao Dengfeng Liu Mingfang Zhang |
| author_facet | Yanli Qin Yaping Wang Qiaoqiao Wang Lijing Fan Qiang Li Fubo Zhao Dengfeng Liu Mingfang Zhang |
| author_sort | Yanli Qin |
| collection | DOAJ |
| description | The hydrological cycle is anticipated to become increasingly variable due to intensified global climate extremes and frequent floods. Understanding the evolution and driving mechanisms of floods in the context of climatic extremes is essential, particularly on the Loess Plateau (LP) where anthropogenic activities are significant. Here, we examined the spatiotemporal variability of climate extremes and their impacts on flood processes on the LP during 1956–2015. We employed a paired year approach to quantitatively assess the driving role of anthropogenic activities on flood changes in 11 major basins. Our findings indicated a general decline in extreme precipitation indices, while temperature has increased across most of the LP. Both annual runoff (Q) and high flow (Q5) magnitude significantly decreased in all basins. We identified that the major climatic indices driving Q5 included erosive precipitation amount, flood season precipitation, heavy precipitation amount, and maximum 7-day precipitation amount. Importantly, anthropogenic activities have mitigated the impact of climate extremes on Q5 regimes. Compared the post-2000 with reference period (1956–1979), under similar climatic conditions, we observed a reduction in the average Q5 magnitude by 30.19–78.14% and a decrease in the average Q5 duration by 46.48–100.00% across the basins. The contributions of climate variability and anthropogenic activities to Q5 magnitude changes among 11 basins ranged from –37.58% to 22.02% and –56.84% to –15.08%, respectively, highlighting the crucial role of ecological restoration in reducing Q5 magnitude. These results underscore the importance of ecological restoration in flood regulation and offer valuable insights for basin management in the Yellow River Basin. |
| format | Article |
| id | doaj-art-2e3f4ab7804b4e0b88d3da2af15ff5db |
| institution | Kabale University |
| issn | 1470-160X |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj-art-2e3f4ab7804b4e0b88d3da2af15ff5db2024-11-11T04:25:06ZengElsevierEcological Indicators1470-160X2024-11-01168112756Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess PlateauYanli Qin0Yaping Wang1Qiaoqiao Wang2Lijing Fan3Qiang Li4Fubo Zhao5Dengfeng Liu6Mingfang Zhang7College of Forestry, Northwest A&F University, Yangling 712100, ChinaCollege of Forestry, Northwest A&F University, Yangling 712100, China; Qinling National Forest Ecosystem Research Station, Yangling, Shaanxi 712100, ChinaCollege of Forestry, Northwest A&F University, Yangling 712100, ChinaCollege of Forestry, Northwest A&F University, Yangling 712100, ChinaCollege of Forestry, Northwest A&F University, Yangling 712100, China; Qinling National Forest Ecosystem Research Station, Yangling, Shaanxi 712100, China; Corresponding author at: College of Forestry, Northwest A&F University, Yangling 712100, China.Department of Earth & Environmental Science, Key Laboratory of Degraded and Unused Land Consolidation Engineering, Xi’an Jiaotong University, Xi’an, ChinaState Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, School of Water Resources and Hydropower, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaThe hydrological cycle is anticipated to become increasingly variable due to intensified global climate extremes and frequent floods. Understanding the evolution and driving mechanisms of floods in the context of climatic extremes is essential, particularly on the Loess Plateau (LP) where anthropogenic activities are significant. Here, we examined the spatiotemporal variability of climate extremes and their impacts on flood processes on the LP during 1956–2015. We employed a paired year approach to quantitatively assess the driving role of anthropogenic activities on flood changes in 11 major basins. Our findings indicated a general decline in extreme precipitation indices, while temperature has increased across most of the LP. Both annual runoff (Q) and high flow (Q5) magnitude significantly decreased in all basins. We identified that the major climatic indices driving Q5 included erosive precipitation amount, flood season precipitation, heavy precipitation amount, and maximum 7-day precipitation amount. Importantly, anthropogenic activities have mitigated the impact of climate extremes on Q5 regimes. Compared the post-2000 with reference period (1956–1979), under similar climatic conditions, we observed a reduction in the average Q5 magnitude by 30.19–78.14% and a decrease in the average Q5 duration by 46.48–100.00% across the basins. The contributions of climate variability and anthropogenic activities to Q5 magnitude changes among 11 basins ranged from –37.58% to 22.02% and –56.84% to –15.08%, respectively, highlighting the crucial role of ecological restoration in reducing Q5 magnitude. These results underscore the importance of ecological restoration in flood regulation and offer valuable insights for basin management in the Yellow River Basin.http://www.sciencedirect.com/science/article/pii/S1470160X24012135Climate extremesAnthropogenic activitiesHigh flowPaired yearLoess Plateau |
| spellingShingle | Yanli Qin Yaping Wang Qiaoqiao Wang Lijing Fan Qiang Li Fubo Zhao Dengfeng Liu Mingfang Zhang Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau Ecological Indicators Climate extremes Anthropogenic activities High flow Paired year Loess Plateau |
| title | Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau |
| title_full | Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau |
| title_fullStr | Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau |
| title_full_unstemmed | Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau |
| title_short | Anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the Loess Plateau |
| title_sort | anthropogenic activities mitigate the impacts of climate extremes on high flow regimes on the loess plateau |
| topic | Climate extremes Anthropogenic activities High flow Paired year Loess Plateau |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X24012135 |
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