EGU2020-14976
https://doi.org/10.5194/egusphere-egu2020-14976
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The influence of topography of stream bed with the clogging layer on the stream-groundwater interaction and the groundwater flow patterns beneath stream bed

Jui-Hsiang Lo1, Hung-Yen Lin2, Yung-Chia Chiu3, Tsung-Yu Lee4, Yi-Zhih Tsai5, Jung-Dung Lee6, and Shao-Yiu Hsu7
Jui-Hsiang Lo et al.
  • 1Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan (sun82715@gmail.com)
  • 2Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan (r05622024@ntu.edu.tw)
  • 3Institute of Earth Sciences, National Taiwan Ocean University, Taipei, Taiwan (ycchiu@mail.ntou.edu.tw)
  • 4Department of Geography,National Taiwan Normal University, Taipei, Taiwan (tylee@ntnu.edu.tw)
  • 5Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan (tsaiyz@ntu.edu.tw)
  • 6Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan (r07622015@ntu.edu.tw)
  • 7Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan (syhsu@ntu.edu.tw)

Studies have indicated that the streambed with the clogging layer affects the interaction between surface water and groundwater. When the streambed covered by a clogging layer, the decrease of the groundwater table can transform the state of stream-groundwater from the connection into disconnection. When the stream-groundwater interaction reaches the state of disconnection, the infiltration rate is independent with the groundwater level beneath the streambed. In this study, we show the effects of the topography of the streambed and clogging layer on the infiltration and groundwater flow patterns beneath the streambed by numerical simulations. The results show that the clogging layer and the change of topography of streambed affect the development of the unsaturated zone, flow path, and residence time beneath the streambed.

How to cite: Lo, J.-H., Lin, H.-Y., Chiu, Y.-C., Lee, T.-Y., Tsai, Y.-Z., Lee, J.-D., and Hsu, S.-Y.: The influence of topography of stream bed with the clogging layer on the stream-groundwater interaction and the groundwater flow patterns beneath stream bed, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-14976, https://doi.org/10.5194/egusphere-egu2020-14976, 2020