Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
권호 표지
DOI QR코드

DOI QR Code

Characteristics of Sediment Transport due to the Construction of Jetty at the Heoya-River Mouth, Ulsan

울산 회야강 하구 도류제 건설에 따른 표사이동 특성

  • 이성대 (한라대학교 토목공학과) ;
  • 김봉익 (경상대학교 해양토목공학과)
  • Received : 2014.06.26
  • Accepted : 2014.11.27
  • Published : 2014.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

Integrated sand control including sediment discharge from hinterland rivers is necessary to maintain coastal sand resources over a long term. In this regard, the following subjects should be considered; efficient ways to transfer discharged sand from a river to the neighboring coast, measures to improve storage efficiency of the discharged sand at the river delta and/or river terrace, measures to prevent the sand resources from being discharged into the deep sea during flooding. From the 1997 to January 2004, the jetty of 156 m length was constructed the Heoya-river mouth to protect the blockade of river mouth. Several tests were carried out to investigate the characteristics of sediment transport and morphological change due to the construction of the jetty at the Heoya-river mouth. Firstly, The sand discharge from Heoya river is quantified by one-dimensional numerical analysis assuming the mixed sand of three different particle diameters. Also the numerical mode system, which predicts the sea bed changes obtained from the Bailard's energy model(1981), was combined with the wave, wave-induced currents and sediment transport models. Then, to understand the changes to the blockade of the river mouth, several aerial photographs were compared, which showed that the changes were significant.

연안에서 표사문제의 대책을 장기적인 관점에서 수립하기 위해서는 연안에서의 표사뿐만 아니라 배후지 하천으로부터 유출되는 유사량을 포함한 종합적인 토사관리 필요성이 증가하고 있다. 이와 같은 관점에서 본 연구에서 연안해역으로 유출되는 하천 유사의 이송, 하구에서 사주발생과 발달 및 하구폐색, 연안으로 유출된 유사의 저류문제, 홍수 시 외해로 유출되는 유사의 특성 등에 대해 검토하였다. 최근 울산 회야강 하구에 하구폐색과 하구사주의 발생에 따른 대책으로 1997년부터 2004년에 걸쳐 총연장 156m의 도류제를 건설하였다. 이에 따라 회야강 하구에서 도류제 건설에 따른 토사이동 특성이 변히고 있음에 따라 해저지형 변동과 표사이동을 해석하기 위하여 1차원 수치해석을 수행하였다. 이를 위해 먼저 울산 회야강 하구역에서 유출하는 유사량을 3가지 모래가 혼합되어 있다고 가정한 혼합입경의 관점을 가정하였다. 그리고 회야강 하구인근의 파동장, 해빈류장 및 표사이동 특성을 Bailard(1981)의 에너지 모형에 의해 해저지형 변동 특성을 해석하였다. 또, 하구폐색의 변동특성을 확인하기 위하여 항공사진을 통한 회야강 하구 및 진하 해수욕장 인근 지형변화를 비교하였다.

Keywords

References

  1. Jung, JS, Lee, JL, Kim, IH, Kwon, HM (2004). Estimation of longshore sediment transport rates from shoreline changes, J. of Korean Society of Coastal and Ocean Engineers, 16(4), pp. 258-267. [Korean Literature]
  2. Cho, KW, Maeng, JH, Chu, YJ, Shin, HW, Kim, KH (2006). Study on the effective mitigation measures of coastal erosion due to coastal developments, Korea Environment Institute, p228. [Korean Literature]
  3. Kim, JD, Jang, WK, Yook, KH (2005). A study of sandy coastal areas in korea: a status and management framework, Korea Maritime Institute, p159. [Korean Literature]
  4. Lee, MS, Park, SW (2007). A Study on improvement of management framework for coastal erosion protection, Ocean and Polar Research, 29(2), pp. 155-165. [Korean Literature]
  5. Bae, SH and Kang, SH (2012). The sediment runoff and geographic change around coastal structure using korean modern map, J. of Korean Geomorphological Association, 19(3), pp. 135-142. [Korean Literature]
  6. Min, BH, Min, IK, Lee, DS (1994). A study on the topography change of Heoya river and Jinha beach, J. of Ocean Engineering and Technology, KSOE, 8(1), pp 84-95. [Korean Literature]
  7. Kim, SD, Kang, KH, Park, HG (2008). Coastline evolution analysis and forecast due to the construction of groin at Heoya-river mouth area, J. of Ocean Engineering and Technology, KSOE, 22(2) pp 28-33. [Korean Literature]
  8. Park, SK, Park, HS, Yoon, JS, Lee, SH (2009). A study on controlling efflux sediment diffusion by jetty construction at small estuary, J. of Korean Society of Civil Engineers, KSCE, 29(5B), pp 483-491. [Korean Literature]
  9. Hasegawa, J, Asano T, Kawazoe, Y and Kishira Y (2005) Relation between long term beach deformation and sediment discharge from hinterland rivers in Shibushi coast, Proc. Asian and Pacific Coasts 2005, pp 1657-1668.
  10. Hosoyamada, T, Tayasu, M, and Yasuta, T (2011) Numerical studies for formation of sand bars in the Agano river mouth, J. JSCE, Ser. B2 (Coastal Engineering), Vol.65, pp 561-565.
  11. Lee, S.D., Park, J.C. and Hong, C.B. (2007) A study on topograpic fluctuation in estuary near the coast, Proc. Korean Society of Civil Engineers, KSCE. [Korean Literature]
  12. Wongsa, S and Shimizu, Y (2001). Modelling pre-channelization and their impact on flood and sediment yield in Ishikari river basin, Ann. J. of Hydraulic Eng., 47, pp. 223-228.
  13. Ashida, K and Michiue, M (1972) Study on hydraulic resistance and bed load transport rate in alluvial streams, Proc. of JSCE, 206, pp. 59-69.
  14. Egiazaroff, IV (1965) Calculation of nonuniform sediment concentration. J. Hydraulics Division, ASCE, Vol. 91, pp. 225-247.
  15. Itakura, T and Kishi, T (1980) Open channel flow with suspended sediments. Journal of Hydraulics Division, ASCE, 106(8), pp. 1325-1343.
  16. Rubey, W (1933) Settling velocity of gravel, sand and silt particles. American Journal of Science, 108, pp. 325-338.
  17. Allard, R, Rogers, WE, Carrol, SN and Rushing, KV (2004) Validation test report for the simulating waves nearshore model(SWAN): Cycle III, version 40.11, Naval Research Lab Stennis Space Center MS Oceanography Div.
  18. Settelmaier, JB, Gibbs, A, Santos, P, Freeman, T and Gaer, D (2011). Simulating waves nearshore (SWAN) modeling efforts at the national weather service(NWS) southern region (SR) coastal weather forecast offices (WFOs). Proc. the 91th AMS Annual Meeting.
  19. Bagnold, RA (1956). The flow of cohesionless grains in fluid, Proc. Roy. Soc., A, 249, pp. 235-297.
  20. Bailard, JA (1981). An Energetics total load sediment transport model for a plane sloping beach, J. Geophysical Research, 86(C11), pp. 10938-10954. https://doi.org/10.1029/JC086iC11p10938
  21. KIOST (1997). Report of Long-term Measured Wave Data, Ministry of Oceans and Fisheries(MOF).