Ecology and Resilient Infrastructure

Korean Society of Ecology and Infrastructure Engineering (응용생태공학회)
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A Study on the Formation of River Sandbar and Management of River Forestation & Aggradation - Focusing on the Jang-Hang Wetland on the Han River -

하천의 사주 형성과 하도 수림화 및 육역화 관리방안에 관한 연구 - 한강 장항습지를 중심으로 -

  • Hong Kyu Ahn (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Dong Jin Lee (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 안홍규 (한국건설기술연구원 수자원하천연구본부) ;
  • 이동진 (한국건설기술연구원 수자원하천연구본부)
  • Received : 2024.05.30
  • Accepted : 2024.06.20
  • Published : 2024.06.30
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Abstract

Recently, most of the rivers in Korea are experiencing various problems in dimension and river environment, such as expansion of stable area where disturbance does not occur during flood, increase of excessive trees in river channel, fixation of river channel, reduction of sand bar. When the soil supplied by the flood is deposited in the river, the plant is settled in the formed terrain, and when another disturbance of the scale that does not erode there occurs after the plant is settled, the river gradually grows and the vegetation zone is formed there. In particular, in terms of river management, river forestation and river aggradation are objects that must be managed because they are disadvantageous in terms of flood control by lowering the flow rate and raising the water level. Therefore, in this study, the area of vegetation occupied by the year of sandbar was analyzed in the process of river aggradation in Jang-Hang wetland. In addition, the correlation between the growth of Jang-Hang wetland was analyzed through the analysis of the flow rate and the flooding frequency that directly affect the growth of Jang-Hang wetland. Through this, the management plan of Jang-Hang wetland, which is registered in Ramsar Wetland but has been river forestation and is undergoing river aggradation, was proposed.

최근 우리나라 대부분의 하천은 사주의 높이 상승 확대로 홍수교란이 미약한 안정역의 확대, 하도내 수목의 과도한 번무와 저수로의 고정화, 모래사주의 감소 등 치수 및 하천환경에서 다양한 문제가 발생하고 있다. 하천은 홍수에 의해서 공급된 토사가 퇴적되어 사주가 만들어지고, 형성된 지형에 식물이 정착하게 되며, 식물이 정착하고 난 후에 그곳이 침식되지 않는 규모의 또 다른 교란이 발생되면 사주는 점차 성장하고 그곳에는 식생대가 형성된다. 특히, 수림화 및 육역화는 하천관리 측면에서 보면, 홍수시 흐름 유속을 저하시키고 수위를 상승시켜 치수적으로 불리한 상황을 만들어 내게 되어 반드시 관리하여야만 하는 대상이 된다. 이에 본 연구에서는 장항습지를 대상으로 하도육역화로 진행되는 과정에서 사주의 경년별 성장과 식생이 차지하는 면적을 분석하였다. 또한 장항습지의 성장에 직접적인 영향을 미치는 유량과 침수빈도 분석을 통하여 장항습지의 성장과의 상관성을 분석하였다. 이를 통하여 람사르습지에 등록되어있지만 수림화 되었고 육역화로 진행중인 장항습지의 올바른 관리방안을 제시하고자 하였다.

Keywords

Acknowledgement

This research was supported by Environmental Fundamental Data Examination project(Connectivity assessment and artificial structures improvement project for improving the health of the Hangang river aquatic ecosystems (2nd Year)) of Hangang River Basin Management Committee.

References

  1. Aga, K., Michioku, K., Kanda, K., and Uotani, T. 2012. Analysis on Forestation Mechanism of River Channel Base on Morphological Change for Sustainable River Management. Japan Society of Civil Engineering 68(4): 745-750. (in Japanese)
  2. Ahn, H.K. and Lee, D.J. 2023. Current status and management plan of stream forestation in Jang-Hang Wetland. Society of Applied Ecological Engineering Academic conference paper. (in Korean)
  3. Ahn, H.K., Kim, S.N., Chung, S.J., Lee, D.J., and Lee, S.H. 2012. Topographical change of sandbar and vegetation settlement in Jang-Hang wetlands for Han River Estuary Wetlands Restoration. Korean Wetlands Society 14(2): 277-288. (in Korean)
  4. APAC (Animal Protection Association of the republic of China). 2019. The landization of the Guandu Natural Reserve Area in proposed to be disorganized by the North City Report. (https://www.apatw.org/project-article/10929)
  5. Baek, K.O. and Im, D.H. 2011. Flow Characteristics Induced by Shift and Modification of Submerged Weir at Han River Estuary. Journal of the Korean Society of Civil Engineers 31(2B): 109-119. (in Korean)
  6. Choi, M.K., Lee, S.H., and Choi, J.K. 2010. A Study of the Geomorphological Process and Vegetation Distribution of Sand-bars on the Tan-cheon River. Journal of the Korean Instituet of Landscape Architecture 37(6): 96-105. (in Korean)
  7. Fujita, K., Lee, S., Watanabe, S., Tsukahara, T., Yamamoto, K., and Mochizuki, T. 2003. Mechanism and Simulation of the Expansion and Extinction of Stable Vegetation Areas in a Gravel-Bed Alluvial Fan River. Japan Society of Civil Engineers Journal 2(747): 41-60. (in Japanese)
  8. Han River Flood Control Office. www.hrfco.go.kr.
  9. Hasegawa, T. and Kudou, N. 2022. Environmentally conscious river excavation in the lower reaches of the Tama River. Japan Ministry of Land, Infrastructure, Transport and Tourism Kantou Regional Development Bureau. skil-up seminal materials book. pp. 1-4. (in Japanese)
  10. Ikeda, T., Maeda, R., Nakamura, T., and Yokoyama, H. 2004. A study on nature restoration of the Shinaano River changing natural environment. Riverfront Research Institute report No.15, pp. 1-8. (in Japanese)
  11. Kayaba, Y. 1998. Current status and circumstances of river forestation. 32nd Japan Aquatic Environment Society Lecture collection. (in Japanese)
  12. Kayaba, Y. and Shimatani, H. 1995. A study on long-term changes in river beds of alluvial fans and their causes. Japanese Society of Civil EngineErs Irrigation Division Report pp. 191-196. (in Japanese)
  13. Keihin River Office(KRO). 2017. Tama River river environment. Presentation material for the 15th River Natural Regeneration Seminar. (in Japanese)
  14. Kim, S.J. 2008. A Study on the Variation of Groundwater Level in the Han River Estuary (The Effect of the Removing of a Weir). Journal of Korean Society of Coastal and Ocean Engineers 20(6): 589-601. (in Korean)
  15. Lee, S.H. and Hwang, S.R. 2006. Formation process of Jang-Hang Wetland at the mouth of the Han River. Construction Technology Information pp. 17-22. (in Korean)
  16. Lee, S.H., Ock, G.Y., and Choi, M.K. 2008. A Study on the Expansion Process of Vegetation on Sand-bars in Fluvial Meandering Stream. Korean Journal of Environment and Ecology 22(6): 658-665. (in Korean)
  17. Ministry of Environment(MoE). 1995-2020. Korea Annual Hydrological Report. (in Korean)
  18. Ministry of Environment(MoE). 2021. The plan of Korean rivers Natural Restoration. (in Korean)
  19. Ministry of Land, Infrastructure and Transport / Seoul Regional Land Management Agency(MLIT). 2020. A Basic Plan for the Han River(Paldang Dam ~ Estuary). (in Korean)
  20. Ministry of Land, Infrastructure and Transport and Toruism (MLITS). 2013. Kushiro Wetland Nature Restoration Project Report pp. 49-61. (in Japanese)
  21. Mori, T., Nagayama, S., Nakamura, K., and Kayaba, Y. 2018. Degradation Mechanisms and Restoration Methods for Lowland River Floodplains with High Biodiversity. Civil Engineering Data No.60-11, pp. 14-17. (in Japanese)
  22. Okabe, T. 2003. Obserbation and simulation of stream water temperature affected by Masaki Dam operation. The First Annual Joint Seminar between Korea and Japan on Ecology and Civil Engineering. (in Japanese)
  23. Oojaki, S. and Watanabe, K. 2008. Examination of topographical changes and water passage capabilities of the keys in the Kita Kawa Tekino district. Japanese Society of Civil Engineers Western Branch Research Presentation Materials pp. 247-248. (in Japanese)
  24. Ozawa, K. and Shimizu, Y. 2016. Study on Forestation Suppressing by Using Flood Disturbance based on Dynamics of Young Riverine Trees After Felling.Japan Society of Civil Engineering 72(4): 1057-1062. (in Japanese)
  25. Sugio, S. and Watanabe, K. 2004. Research on the Change of Topographical Eeatures and Vegetated Region on Floodplain in Kita River. Journal of the Japanese Society of Hydrological Engineering 48: 985-990. (in Japanese)
  26. Tsujimoto, T. 1993. Characteristics of Main Vegetation Colony and River Channel in Tedori driver alluvial Fan Section. Report of the Japan Sea Research Institute at Kanajawa University 25: 83-99. (in Japanese)
  27. Watanabe, T. 2018. Research on the phenomenon and continuous development of natural regeneration projects targeting wetlands. Tokyo University doctoral thesis. (in Japanese)
  28. Wikipedia. 2023. https://en.wikipedia.org/wiki/Wash_load. Accessed 10 April 2023.
  29. Woo, H.S., Julien, P.Y., and Richardson, E.V. 1986. Washload and Fine Sediment Load. Journal of Hydraulic Engineering 112(6): 541-545. (in Korean)
  30. Yeom, J.H., Han, B.H., and Lee, K.J. 2010. A Study on the Possibility of Designating Ramsar Site in Large-scale Wetlands and Management Plan. Korean Journal of Environment and Ecology 24(3): 249-257. (in Korean)