| Impact of the Yellow River capture on the paleoenvironmental changes of Hongze Lake,China |
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| 作者姓名： | Hongwu Tang Ming Gao Saiyu Yuan Huiming Zhang Yang Xiao Fuxin Zhang Kun Zhang |
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| 作者单位： | 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University;2. Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources, Hohai University;3. Institute of Water Science and Technology, Hohai University |
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| 基金项目： | supported by the National Key Research and Development (R&D) Program of China (Grant No. 2019YFE0109900)； |
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| 摘 要： | The Yellow River(YR) capture of the Huai River had a profound effect on the landscape evolution,ecology, and social development in China, disrupting the evolution of some vital shallow floodplain lakes.Because of the absence of lacustrine sediment provenance analysis, previous studies were inadequate in distinguishing the influence of YR capture on paleoenvironmental changes in these lakes, especially on landscape evolution, redox conditions, lake level changes, and organic productivity. The cur...
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| 收稿时间： | 21 July 2022 |
Impact of the Yellow River capture on the paleoenvironmental changes of Hongze Lake,China |
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| Hongwu Tang,Ming Gao,Saiyu Yuan,Huiming Zhang,Yang Xiao,Fuxin Zhang,Kun Zhang.Impact of the Yellow River capture on the paleoenvironmental changes of Hongze Lake,China[J].International Journal of Sediment Research,2023,38(4):503-515. |
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| Institution: | 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;2. Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources, Hohai University, Nanjing 210098, China;3. Institute of Water Science and Technology, Hohai University, Nanjing 210098, China;1. Department of Environmental Engineering, Federal University of Paraná, Curitiba, Brazil;2. Institute of Hydraulic Research, Federal University of Rio Grande do Sul, Porto Alegre, Brazil;1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China;2. Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China;3. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China;4. Institute of Water Science and Technology, Hohai University, Nanjing, China;5. School of Engineering, Westlake University, Hangzhou, China;6. Department of Engineering, University of Cambridge, Cambridge, UK;1. Ocean College, Zhejiang University, Zhoushan 316021, China;2. Ocean Research Center of Zhoushan, Zhejiang University, Zhoushan 316021, China;3. College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China;1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin, China;2. Co-Innovation Center for Sustainable Forestry in Southern China of Jiangsu Province, Key Laboratory of Soil and Water Conservation and Ecological Restoration of Jiangsu Province, Nanjing Forestry University, Nanjing 210037, Jiangsu, China;3. School of Geography, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;4. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, Jiangsu, China |
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| Abstract: | The Yellow River (YR) capture of the Huai River had a profound effect on the landscape evolution, ecology, and social development in China, disrupting the evolution of some vital shallow floodplain lakes. Because of the absence of lacustrine sediment provenance analysis, previous studies were inadequate in distinguishing the influence of YR capture on paleoenvironmental changes in these lakes, especially on landscape evolution, redox conditions, lake level changes, and organic productivity. The current study aims to use X-ray fluorescence-core scanning (XRF-CS) and multivariate statistics on a 9.8 m sediment core from Hongze Lake (HZL), China, to analyze the impact of the YR capture on the lake's paleoenvironmental changes and the sediment provenance simultaneously. High-resolution images, magnetic susceptibility, and XRF-based multi-element data were obtained using a GEOTEK Multi-Sensor Core Logger. The calcium (Ca) content indicates the presence of YR sediment in HZL, given the high Ca content in YR sediment and the identification of mainly exogenous sources of Ca in HZL. The high values of Ca indicate that 48.7% of the sediment in the center of HZL is related to the YR's incursion. Periods of higher Ca content coincide with periods of higher oxygenation levels of the lake (as indicated by the ratio of manganese to titanium) and lower organic content in the lake sediment (as indicated by the ratio of incoherent to coherent scatter). These analyses reveal that the YR's capture of HZL significantly increased the lake's oxygen level. Furthermore, the decrease in the organic content of sediment tends to be the result of the accelerated deposition caused by the YR. The decrease in Ca content coincides with an increase in lake levels (as indicated by magnetic susceptibility). Thus, it can be inferred that the embankment on the eastern side of HZL, built to increase lake storage, has reduced the incursion frequency of the YR. |
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| Keywords: | Yellow River capture Paleoenvironmental reconstruction XRF-CS Hongze Lake |
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