Proceedings of the Korea Water Resources Association Conference (한국수자원학회:학술대회논문집)

Korea Water Resources Association (한국수자원학회)
권호 표지

Evaluation of along-channel sediment flux gradients in an anthropocene estuary with an estuarine dam

  • Figueroa, Steven M. (Dept. of Civil Eng., Chungnam National University) ;
  • Lee, Guan-hong (Dept. of Oceanography, Inha University) ;
  • Chang, Jongwi (Dept. of Oceanography, Inha University) ;
  • Schieder, Nathalie W. (Dept. of Oceanography, Inha University) ;
  • Kim, Kyeongman (Dept. of Oceanogrpahic Survey, Geosystem Research Corp.) ;
  • Kim, Seok-Yun (Dept. of Oceanography, Pukyong National University) ;
  • Son, Minwoo (Dept. of Civil Eng., Chungnam National University)
  • Published : 2022.05.19
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Abstract

While estuarine dams can develop freshwater resources and block the salt intrusion, they can result in increased sediment deposition in the estuary. The mechanism of increased sediment deposition in an estuary with an estuary dam is not well understood. To fill this knowledge gap, 7 ADCP measurements of flow and suspended sediment concentration (SSC) were collected along-channel in an estuary with an estuarine dam over a neap-spring cycle. Flow and SSC were used to calculate the sediment flux and sediment flux gradients. The results indicated that the cumulative sediment fluxes at all stations were directed landward. The along-channel sediment flux gradient was negative, which indicated deposition along the channel. The landward mean-flow fluxes were dominant in the deep portion of the channel near the estuary mouth, whereas landward correlation fluxes were dominant in the shallow portion of the channel near the estuarine dam. The tides were the dominant forcing driving the sediment fluxes throughout the estuary.

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Acknowledgement

This research was supported by Basic Science Research Program (2017R1D1A1B05033162) and Center for Anthropocene Studies (2018R1A5A7025409) through the National Research Foundation of Korea (NRF). This work was also supported by the Ministry of Oceans and Fisheries, Korea under the project titled "Construction of Ocean Research Station and Their Application Studies". Presentation of this research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1I1A3060354).