The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Impact of Turbidity on Protected Plants along River Levees

탁수가 하천 제방보호 식물에 미치는 영향 분석

  • Kim, Jong-Tae (River Experiment Center, Korea Institute of Construction Technology) ;
  • Kim, Eun-Jin (River Experiment Center, Korea Institute of Construction Technology) ;
  • Kang, Joon-Gu (River Experiment Center, Korea Institute of Construction Technology) ;
  • Yeo, Hong-Koo (River Experiment Center, Korea Institute of Construction Technology)
  • 김종태 (한국건설기술연구원 하천실험센터) ;
  • 김은진 (한국건설기술연구원 하천실험센터) ;
  • 강준구 (한국건설기술연구원 하천실험센터) ;
  • 여홍구 (한국건설기술연구원 하천실험센터)
  • Received : 2013.05.28
  • Accepted : 2013.06.25
  • Published : 2013.06.30
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Abstract

We analyzed the effect of changing water level and turbidity on plants that serve to maintain slope stability on levees. In this experiment, soil collected from upstream of Imha Dam was placed in a water tank and planted with river plants of the Salix species: Salix gracilistyla, S. koreensis, and S. glanduosa. Plant regrowth was analyzed stage-by-stage during a recovery period. In addition, we assessed the tolerance of the plants to concentrated torrential rainfall and examined their recovery rates. The results indicate that in the case of these three Salix species, which are the most prevalent river plants in Korea, stem growth is arrested following serious damage and high turbidity. The possibility of regrowth was very low during the 20-day non-submerged recovery period. Although the number of leaves initially decreased during this period, subsequent regrowth was reasonably high: recovery in S. gracilistyla, S. koreensis, and S. glanduosa was up to 59.3%, 251.3%, and 148.4% respectively, compared with the initial condition.

본 연구에서는 대규모 하천이나 댐 조성 시 형성되는 인공 또는 자연 사면의 안정성 확보에 고려되는 제방보호 식물이 수위와 탁도의 변화에 따라 어떻게 영향을 받는지에 대해 분석하였다. 실험을 위하여 임하댐 상류 지천에서 채취한 토양을 이용하여 탁수를 재연하였으며 사면 내 식물은 국내 대표 버드나무속 식물인 갯버들, 버드나무, 왕버들을 사용하였다. 또한 하천식물이 비침수의 회복시간을 가질 경우 재성장 가능성을 단계별로 분석하여 집중호우로 인한 하천식물의 피해와 회복 가능성을 평가하였다. 연구 결과 국내 대표 하천식물인 버드나무속 3종은 고탁도 침수가 발생하면 줄기의 경우 심각한 피해로 인해 성장이 멈추었으며 20일 동안 비침수의 회복이 진행되어도 재성장 가능성은 낮은 것으로 나타났다. 그러나 엽수의 경우 침수로 인해 초기에는 감소했지만 비침수의 회복이 진행되면 갯버들은 초기상태 대비 59.3%까지 회복하였으며 버드나무와 왕버들도 초기상태 대비 각각 251.3%, 148.4%로 측정되어 재성장률이 높은 것으로 나타났다.

Keywords

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  2. Effects of Water Level Change on Wetland Vegetation in the Area of Riparian Forest for Dam Construction Period -Focused on the Hantan River Dam- vol.30, pp.1, 2014, https://doi.org/10.7747/JFS.2014.30.1.76
  3. Study on Flooding Tolerance of Salix Species for Ecological Restoration of the River vol.16, pp.4, 2014, https://doi.org/10.17663/JWR.2014.16.4.327