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Influence of river-lake isolation on the water level variations of Caizi Lake, lower reach of the Yangtze River

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Abstract

In order to explore the water level variations of Caizi Lake under river-lake isolation, the monthly water level of the Chefuling station in Caizi Lake from 1989 to 2018 and the daily water level, rainfall and flow of local hydrological stations in 2018 were analyzed by using the Mann-Kendall trend test and wavelet analysis. Results showed that the difference of the average water level of Caizi Lake between the flood and dry seasons was 3.34 m, with a multi-year average water level of 10.42 m above sea level. The first and second main periods of the water level of Caizi Lake were 128 and 18 months, respectively, with 4 and 29 “up-down” cycles, respectively. From 2018, the next 3–4 years were likely to be the low water level period. The water level of Caizi Lake was significantly correlated with that of the Anqing hydrological station of the Yangtze River (r=0.824, P<0.01). In addition, the current hydrological staging of Caizi Lake was about 30 days behind than before the sluice was built. Under the dual influences of the river-lake isolation and the Yangtze-to-Huaihe Water Diversion Project (YHWD), the hydrological regime change of Caizi Lake and its eco-environmental effect needed long-term monitoring and research.

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Authors and Affiliations

  1. School of Resources and Environment, Anqing Normal University, Anqing, Anhui, 246133, China

    Lesheng An, Lei Zhu & Baohua Zhou

  2. Key Laboratory of Watershed Geographic Sciences, Nan**g Institute of Geography and Limnology, CAS, Nan**g, 210008, China

    Kaihua Liao

Authors
  1. Lesheng An
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  2. Kaihua Liao
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  3. Lei Zhu
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  4. Baohua Zhou
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Corresponding author

Correspondence to Kaihua Liao.

Additional information

Foundation: National Natural Science Foundation of China, No.41771107; Anhui Provincial Natural Science Foundation, No.1808085MD101; Outstanding Young Talents Support Program in Universities of Anhui Province in 2020, No.gxyq2020030; Youth Innovation Promotion Association, Chinese Academy of Sciences, No.2020317

An Lesheng (1982-), Associate Professor, specialized in wetland hydrology and eco-hydrology.

Liao Kaihua (1984-), Associate Professor, specialized in soil hydrology and physical geography.

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An, L., Liao, K., Zhu, L. et al. Influence of river-lake isolation on the water level variations of Caizi Lake, lower reach of the Yangtze River. J. Geogr. Sci. 31, 551–564 (2021). https://doi.org/10.1007/s11442-021-1858-4

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  • DOI: https://doi.org/10.1007/s11442-021-1858-4

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