Browse > Article
http://dx.doi.org/10.5762/KAIS.2019.20.12.8

Experimental Study on the Characteristics of Local Scour Hole Downstream of V-shaped Drop Structure Model  

Eom, Junghyun (Dept. of Civil Engineering, Inha University)
Han, Hyeongjun (Construction Test Center, Korea Institute of Civil Engineering and Building Technology)
Park, Sung Won (Dept. of Data-centric Problem Solving Research, Korea Institute of Science and Technology Information)
Ahn, Jungkyu (Dept. of Civil and Environmental Engineering, Incheon National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.12, 2019 , pp. 8-14 More about this Journal
Abstract
A drop structure, one of the representative river-crossing structures, is constructed to stabilize a riverbed. On the other hand, the structure interrupts the continuity of the river and causes the destruction of the hydro-ecological environment. Therefore, laboratory experiments of a natural type of drop structure with low differences were performed, and the empirical formula of a local scour hole is proposed. Four experimental flow rates were tested for various types of the drop structure models with 28 test cases. Based on the scour test, it was confirmed that the maximum scour depth occurs rather than the result of applying the previously proposed scour depth formulae. Correlation analysis of the major factors of scour hole at the downstream of the drop structure revealed a strong correlation between the upstream flow characteristics, drop structure height, and total crossing length of the drop model. In addition, the depth and length estimation formula of the maximum scour hole were proposed using the dimensionless variables and validated. In the future, it is also expected that more accurate scour prediction and calculation can be derived by conducting experimental studies and numerical analysis considering the various bed materials and flow conditions.
Keywords
Drop Structure; River-Crossing Structure; Laboratory Experiments; Local Scour; V-Shaped Drop Structure Models; Dimensionless Variables;
Citations & Related Records
연도 인용수 순위
  • Reference
1 KWRA, Design Criteria of the Hydraulic Structures and River Managemens in Rivers, Korea Water Resources Association, 2015 (in Korean).
2 Schokiltsh, "Kolkbildung unter Uberfallstrahlen", Die Wasswirtschaft, Vol.24, pp. 341-343 (in German).
3 G. J. M. Hoffmans, "Jet Scour in Equilibrium Phase", ASCE, Journal of Hydraulic Engineering, ASCE, Vol.124, No.4, pp. 430-437, 1998. DOI: https://doi.org/10.1061/(ASCE)0733-9429(1998)124:4(430)   DOI
4 A. Veronese, "Erosionidi Fondo a Valle di uno Scarico," Annali dei Lavori Pubblici, Vol.75, pp.717-726, 1987 (in Italian).
5 F. Zimmerman and U. Maniak, "Scour Behind Stilling Basin with End Sills of Baffle Piers," Proceedings of 12th Congress IAHR, Fort. Collins, September, 1967, pp. 117-124.
6 N. E. Bormann and P. Y. Julien "Scour Downstream of Grade-Control Structures", Journal of Hydraulic Engineering, ASCE, Vol.117, No.5, 1991, pp.579-594. DOI: https://doi.org/10.1061/(ASCE)0733-9429(1991)117:5(579)   DOI
7 F. E. Fahhlbusch "Scour in Rock Riverbeds Downstream of Large Dams", International Journal on Hydropower & Dams, IAHR, Vol.1, No.4, pp. 30-32.
8 J. H. Eom, Experimental Study on Scour Characteristics at Downstream of Drop Structures According to Plan Types, Ph.D dissertation, Inha University, Incheon, South Korea, pp. 24-32, 2011. URL: https://dspace.inha.ac.kr/handle/10505/23014
9 S. D. Park, "Assessment of Ascending Capacity of Migratory Fish in Fishways by Eco-hydraulic Experiments (II)", Journal of Korea Water Resources Association, Vol. 34, No. 4, pp. 381-390, 2001. URL: kwra.or.kr/wonmun/KWRA2_2001_34_4_381(C).pdf
10 H. S. Woo, W. Kim, U. Ji, Fluvial Hydraulics, Cheong Moon Gak publisher, 2015 (in Korean).