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Influence of Seepage Face Obliquity on Discharge of Groundwater and its Pollutant Into Lake from a Typical Unconfined Aquifer

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Abstract

Lab experiment and mathematical simulation Modular three dimensional finite difference groundwater flowmodel (MODFLOW) were performed in a soil tank to simulate the hydrogeochemical interaction between lake and typical unconfined aquifer. Results show that the velocity decreases exponentially with the transect distance on seepage face. The maximal velocity occurs at the top point of seepage face. The obliquity of seepage face has a great influence on the maximum and distribution of seepage velocity. With the increase of the obliquity of seepage face, the maximal velocity decreases quickly and the velocity distribution becomes much more even. Most of groundwater flow and pollutant flux discharges through a narrow portion near the top of seepage face. The flow and mass concentrated in the narrow portion increase with the decrease of the obliquity of seepage face. These will benefit to design a reasonable and economical scenario to manage lakeshore and to control the pollution of lake water near lakeshore.

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Authors and Affiliations

  1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China

    Yong Li

  2. College of Environmental Science and Engineering, Hohai University, Nanjing, 210098, China

    Chao Wang & Yi-ping Li

  3. Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China

    Lin-zhang Yang

Authors
  1. Yong Li
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  2. Chao Wang
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  3. Lin-zhang Yang
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  4. Yi-ping Li
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Corresponding author

Correspondence to Yong Li.

Additional information

Project supported by the National Natural Science Foundation of China (Grant No. 40601050) and the National Basic Research Program of China (973 Program, Grant No. 2002CB412303) and the Jiangsu Province Qinglan Project (2006).

Biography: LI Yong (1974-), Male, Ph. D., Lecturer

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Li, Y., Wang, C., Yang, Lz. et al. Influence of Seepage Face Obliquity on Discharge of Groundwater and its Pollutant Into Lake from a Typical Unconfined Aquifer. J Hydrodyn 19, 756–761 (2007). https://doi.org/10.1016/S1001-6058(08)60014-1

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  • DOI: https://doi.org/10.1016/S1001-6058(08)60014-1

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