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2025 Vol.58, Issue 5 Preview Page

Research Article / 우수학생논문상

Characterizing submerged meandering flow pattern in Paldang Lake considering flow conditions

유황 기반 팔당호 잠행 사행 흐름 특성 고찰

Yongmuk Kanga
,
Dongsu Kimb
,
Suin Choic*
,
Youngdo Kimd
강 용묵a
,
김 동수b
,
최 수인c*
,
김 영도d
aMaster’s Course, Department of Civil & Environmental Engineering, Dankook University, Yongin, Korea
bProfessor, Department of Civil & Environmental Engineering, Dankook University, Yongin, Korea
cPh.D. Student, Department of Civil & Environmantal Engineering, Dankook University, Yongin, Korea
dProfessor, Department of Civil & Environmental Engineering, Myongi University, Yongin, Korea
a단국대학교 토목환경공학과 석사과정
b단국대학교 토목환경공학과 교수
c단국대학교 토목환경공학과 박사과정
d명지대학교 토목환경공학과 교수
*Corresponding Author
31 May 2025. pp. 411-423
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Abstract

Paldang Lake, an artificial reservoir formed by the inflows of the Namhan River, Bukhan River, and Gyeongan Stream, exhibits both fluvial and lacustrine flow characteristics depending on flood and low-flow conditions while maintaining a meandering river morphology post-impoundment. This study focuses on the flow characteristics in the meander bend near Sonnae Island, analyzing velocity distribution and secondary circulation structures under flood and normal flow regimes. Mobile cross-sectional surveys combining ADCP and DGPS were conducted, and flow and secondary current data were visualized and spatially interpolated using VMS and ArcGIS Pro. The analysis revealed that during flood conditions, high-velocity flows originating from the Namhan River generated a large-scale single-loop (Main Cell) secondary circulation along the meander bend, contributing to bed erosion. In contrast, during low-flow conditions, a low-velocity environment fostered the development of small-scale multi-cellular secondary circulation structures, leading to the formation of stagnant zones where sediment deposition predominates. These findings indicate that the velocity field and secondary flow structures in the meander bend exhibit significant variability between flood and normal flow regimes, highlighting hydraulic and geomorphic changes within the Paldang Lake watershed.

Keywords
Paldang Lake
ADCP
flow pattern
Meandering flow
Secondary flow
Maximum flows

팔당호는 남한강, 북한강, 경안천의 유입으로 형성된 인공호로, 담수화 이후 사행하천 형상을 유지하면서 홍수기와 갈수기에 따라 하천형 및 호소형 흐름 특성을 나타낸다. 본 연구는 소내섬 인근 만곡부에서의 흐름 특성을 중심으로, 홍수기와 평수기 유황 조건에서의 유속 분포 및 이차류 순환구조를 분석하였다. 이를 위해 ADCP와 DGPS를 결합한 이동식 횡단 측정을 실시하였으며, VMS와 ArcGIS Pro를 활용해 유속 및 이차류 데이터를 시각화하고 공간보간을 수행하였다. 분석 결과, 홍수기에는 남한강에서 기원한 강한 유속이 만곡부를 따라 단일 순환형(Main Cell)의 대규모 이차류를 형성하며, 이는 하상 침식을 유발하는 원인으로 작용하였다. 반면, 평수기에는 저유속 환경에서 소규모 다중 순환 구조가 발현되며, 사수역이 발생하여 퇴적이 우세한 양상을 보였다. 이러한 결과는 만곡부 유속장 및 이차류 구조가 홍수기와 평수기 유황 조건에 따라 크게 달라짐을 시사하며, 팔당호 유역 내 수리‧지형적 특성 변화를 제시한다.

키워드
팔당호
ADCP
흐름특성
사행흐름
이차류
최대유속선
References
1

Baek, K., Seo, I., and Lee, K. (2006). "Estimation formula for variations in secondary currents along flow direction in curved channels." Journal of the Korean Society of Civil Engineers, Vol. 26, No. 4B, pp. 371-378.

2

Blanckaert, K.D.V.H., and De Vriend, H.J. (2004). "Secondary flow in sharp open-channel bends." Journal of Fluid Mechanics, Vol. 498, pp. 353-380.

10.1017/S0022112003006979
3

Choi, H., Cho, Y., Yoo, S., Song, Y., and Ryu, I. (2019). "Analysis of water circulation characteristics in Paldang Lake through hydraulic and water temperature investigations." Ecology and Resilient Infrastructure, Vol. 6, No. 1, pp. 12-21.

4

Choi, S., Kim, D., and Seo, I. (2024). "Stratified features in Paldang Lake considering induced density currents and seasonal thermal effect." Journal of Korea Water Resources Association, Vol. 57, No. 2, pp. 99-110. doi: 10.3741/JKWRA.2024.57.2.99.

10.3741/JKWRA.2024.57.2.99
5

Choi, S., Kim, D., Kim, Y., and Lyu, S. (2023). "Hydraulic mixing characteristics at a large-scale confluence of Nakdong and Nam River." Journal of Korea Water Resources Association, Vol. 56, No. S-1, pp. 1015-1026. doi: 10.3741/JKWRA.2023.56.S-1.1015

10.3741/JKWRA.2023.56.S-1.1015
6

Gotvald, A.J., and Oberg, K.A. (2009). Acoustic Doppler current profiler applications used in rivers and estuaries by the US Geological Survey. Report No. 2008-3096, US Geological Survey, Reston, VA, U.S., pp. 1-4.

10.3133/fs20083096
7

Graf, W.H., and Blanckaert, K. (2002). "Flow around bends in rivers," Proceeding of the 2nd International Conference New Trends in Water and Environmental Engineering for Safety and Life: Eco-Compatible Solutions for Aquatic Environments, Capri, Italy, Vol. 1, p. 9.

8

Kim, D. (2023). White paper of water resources. Gyenggi Water Resources Headquaters, p.11.

9

Kim, D., Winkler, M., and Muste, M. (2015). "A GIS-based computational tool for multidimensional flow velocity by acoustic Doppler current profilers." Journal of Physics: Conference Series, Vol. 622, No. 1, 012024.

10.1088/1742-6596/622/1/012024
10

Kim, J., Lee, S., Bang, H., and Hwang, S. (2009). "Characteristics of algal blooms in Paldang Lake." Journal of Korean Society of Environmental Engineers, Vol. 31, No. 5, pp. 325-331.

11

Kong, D. (2019). "Evaluation of the impact of density currents on the vertical distribution of water quality in Paldang Lake." Journal of Korean Society on Water Environment, Vol. 35, No. 6, pp. 557-566.

12

Kong, D., Min, J., Byun, M., Park, H., and Chun, S. (2018). "Spatiotemporal characteristics of water quality in Paldang Lake, a river-type reservoir." Journal of Korean Society on Water Environment, Vol. 34, No. 5, pp. 470-486.

13

Lee, C., Park, J., Kim, K., Ryu, S., Kim, D., and Kim, Y. (2022). "Two-dimensional spatial distribution analysis using water quality measurement results at river confluences." Journal of the Korean Society of Civil Engineers, Vol. 42, No. 3, pp. 343- 350.

14

Lee, S., and Lee, S. (2022). "The analysis of water factors for management of lake eutrophication in Paldang lake." Journal of Korean Society for Ecological Engineering, Vol. 9, No. 1, pp. 61-72.

10.33214/kees.2022.9.1.61
15

Liu, X., Xia, J., Deng, S., Zhou, M., Mao, B., and Blanckaert, K. (2024). "Hydrodynamic and morphological adaptation of two consecutive sharp bends of the Middle Yangtze River to upstream damming." Water Resources Research, Vol. 60, No. 1, e2023WR034990.

10.1029/2023WR034990
16

Morell, M.I. (2015). On the Rozovskii method to insolate seccondary circulation from skewed flow. PH. D. Dissertation, University Nacional del Litoral, Santa Fe, Argentina, pp. 21-23.

17

Pacheco, A.M.D. (2010). Hydrodynamic and sediment fluxes through the inlets of the Ria Formosa. Ph.D. Dissertation, Universidade do Algarve, Portugal.

18

Parsons, D. R., Jackson, P.R., Czuba, J.A., Engel, F.L., Rhoads, B.L., Oberg, K.A., Best, J.L., Mueller, D.S., Johnson, K.K., and Riley, J.D. (2013). "Velocity Mapping Toolbox (VMT): A processing and visualization suite for moving-vessel ADCP measurements." Earth Surface Processes and Landforms, Vol. 38, No. 11, pp. 1244-1260.

10.1002/esp.3367
19

Rhoads, B.L., and Johnson, K.K. (2018). "Three-dimensional flow structure, morphodynamics, suspended sediment, and thermal mixing at an asymmetrical river confluence of a straight tributary and curving main channel." Geomorphology, Vol. 323, pp. 51-69.

10.1016/j.geomorph.2018.09.009
20

Riley, J.D., and Rhoads, B.L. (2012). Flow structure and channel morphology at a natural confluent meander bend. Geomorphology, Vol. 163, pp. 84-98.

10.1016/j.geomorph.2011.06.011
21

Ruben, L.D., Szupiany, R.N., Tassi, P., and Vionnet, C.A. (2021). "Large meandering bends with high width-to-depth ratios: Insights from hydro-sedimentological processes." Geomorphology, Vol. 374, 107521.

10.1016/j.geomorph.2020.107521
22

Ryu, I., Choi, H., Shin, D., Yoo, S., and Jung, S. (2020). "Analysis of water circulation characteristics in Paldang Lake during the development of thermal stratification using a 3D numerical model." Proceedings of the Joint Conference of the Korean Society of Water and Wastewater and the Korean Society on Water Environment, pp. 1-1.

23

Seo, I., and Park, S. (2009). "Effects of velocity structure on the mixing of tracers in meandering channels." Journal of the Korean Society of Civil Engineers, Vol. 29, No. 1B, pp. 35-45.

24

Seo, I., Sung, K., Baek, K., and Jeong, S. (2004). "An experimental study on flow characteristics in meandering channels." Journal of Korea Water Resources Association, Vol. 37, No. 7, pp. 527-540.

10.3741/JKWRA.2004.37.7.527
25

Son, B., Kim, Y., Choi, Y., Choi, J., and Ahn, S. (2010). "Analysis of flow characteristics in curved channels using hydraulic experiments and numerical models." Journal of Korea Water Treatment Society, Vol. 18, No. 5, pp. 95-109.

26

Son, G. (2014) Experimental study on flow and turbulent characteristics of real-scale meandering channel. Master's Thesis. Dankook University.

27

Woo, H., Kim, W., and Ji, W. (2015). River-hydraulics. Cheongmungak, pp. 254-263.

28

Yang, S., Kim, D., Jung, W., and Ryu, K. (2011). "Comparative analysis of stream runoff in Jeju Island using various advanced flow measurement devices." Journal of Environmental Science International, Vol. 20, No. 6, pp. 783-788.

10.5322/JES.2011.20.6.783
29

Yuan, S., Tang, H., Li, K., Xu, L., Xiao, Y., Gualtieri, C., and Melville, B. (2021). "Hydrodynamics, sediment transport and morphological features at the confluence between the Yangtze River and the Poyang Lake." Water Resources Research, Vol. 57, No. 3, e2020WR028284.

10.1029/2020WR028284
Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 58
  • No :5
  • Pages :411-423
  • Received Date : 2025-01-26
  • Revised Date : 2025-03-10
  • Accepted Date : 2025-03-24
  • DOI :https://doi.org/10.3741/JKWRA.2025.58.5.411
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