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Scour downstream of J-Hook vanes in straight horizontal channels

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
J-Hook vanes are grade control structures used to stabilize the riverbed. This paper aims to investigate the behaviour of J-Hook vanes as a grade-control structure in straight rivers. Scour downstream of J-Hook vane structures like other grade-control structures depends on the shape of the structure and the river hydraulic conditions. The purpose of this study is classifying the scour geometry and predicting the main scour parameters such as the scour depth, length, width, and the ridge height and length downstream of the J-Hook vanes in straight rivers. Experiments were carried out in a horizontal channel. For each length of the structure, three heights in different hydraulic conditions, including densimetric Froude numbers, water drops, and opening ratios, were tested. Results show that the densimetric Froude number, the drop height, and the height of the structure are the key parameters to form and classify the scour. Equations have been derived using dimensional analysis and experimental data to predict the maximum scour depth, the maximum length of the scour, the maximum scour width, and the maximum height and length of the dune. All the experiments were conducted in clear water conditions.
Czasopismo
Rocznik
Strony
1211--1228
Opis fizyczny
Bibliogr. 26 poz.
Twórcy
autor
  • Department of Civil Engineering, University of Pisa, Pisa, Italy
  • Department of Civil Engineering, University of Pisa, Pisa, Italy
autor
  • Department of Civil Engineering, University of Pisa, Pisa, Italy
Bibliografia
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  • 2. Bhuiyan, F., R.D. Hey, and P.R. Wormleaton (2007), Hydraulic evaluation of W-weir for river restoration, J. Hydraul. Eng. ASCE 133,6, 596–609, DOI: 10.1061/(ASCE)0733-9429(2007)133:6(596).
  • 3. Bormann, N.E., and P.Y. Julien (1991), Scour downstream of grade-control structures, J. Hydraul. Eng. ASCE 117,5, 579–594, DOI: 10.1061/(ASCE)0733-9429 (1991)117:5(579).
  • 4. D’Agostino, V., and V. Ferro (2004), Scour on alluvial bed downstream of gradecontrol structures, J. Hydraul. Eng. ASCE 130,1, 24–37, DOI: 10.1061/(ASCE)0733-9429(2004)130:1(24).
  • 5. Dey, S., and R.V. Raikar (2007), Scour below a high vertical drop, J. Hydraul. Eng. ASCE 133,5, 564–568, DOI: 10.1061/(ASCE)0733-9429(2007)133:5(564).
  • 6. Dey, S., and A. Sarkar (2006a), Scour downstream of an apron due to submerged horizontal jets, J. Hydraul. Eng. ASCE 132,3, 246–257, DOI: 10.1061/(ASCE)0733-9429(2006)132:3(246).
  • 7. Dey, S., and A. Sarkar (2006b), Response of velocity and turbulence in submerged wall jets to abrupt changes from smooth to rough beds and its application to scour downstream of an apron, J. Fluid Mech. 556, 387–419, DOI: 10.1017/S0022112006009530.
  • 8. Dey, S., and A. Sarkar (2008), Characteristics of submerged jets in evolving scour hole downstream of an apron, J. Eng. Mech. 134,11, 927–936, DOI: 10.1061/(ASCE)0733-9399(2008)134:11(927).
  • 9. Dey, S., and B. Westrich (2003), Hydraulics of submerged jet subject to change in cohesive bed geometry, J. Hydraul. Eng. ASCE 129,1, 44–53, DOI: 10.1061/(ASCE)0733-9429(2003)129:1(44).
  • 10. Farhoudi, J., and K.V.H. Smith (1985), Local scour profiles downstream of hydraulic jump, J. Hydraul. Res. 23,4, 343–358, DOI: 10.1080/00221688509499344.
  • 11. Hassan, N.M.K.N., and R. Narayanan (1985), Local scour downstream of an apron. J. Hydraul. Eng. ASCE 111,11, 1371–1384, DOI: 10.1061/(ASCE)0733-9429(1985)111:11(1371).
  • 12. Kondolf, G.M. (2006), River restoration and meanders, Ecol. Soc. 11,2, 42.
  • 13. Mason, P.J., and K. Arumugam (1985), Free jet scour below dams and flip buckets, J. Hydraul. Eng. ASCE 111,2, 220–235, DOI: 10.1061/(ASCE)0733-9429(1985)111:2(220).
  • 14. Pagliara, S. (2007), Influence of sediment gradation on scour downstream of block ramps, J. Hydraul. Eng. ASCE 133,11, 1241–1248, DOI: 10.1061/(ASCE)0733-9429(2007)133:11(1241).
  • 15. Pagliara, S., and S.M. Kurdistani (2013), Scour downstream of cross-vane structures, J. Hydro-Environ. Res., DOI: 10.1016/j.jher.2013.02.002.
  • 16. Pagliara, S., and M. Palermo (2008), Scour control and surface sediment distribution downstream of block ramps, J. Hydraul. Res. 46,3, 334–343, DOI: 10.3826/jhr.2008.3208.
  • 17. Pagliara, S., M. Palermo, and I. Carnacina (2009), Scour and hydraulic jump downstream of block ramps in expanding stilling basins, J. Hydraul. Res. 47,4, 503–511, DOI: 10.1080/00221686.2009.9522026.
  • 18. Pagliara, S., M. Palermo, and I. Carnacina (2012), Live-bed scour downstream of block ramps for low densimetric Froude numbers, Int. J. Sediment Res. 27,3, 337–350, DOI: 10.1016/S1001-6279(12)60039-0.
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  • 20. Rosgen, D.L. (2001), The cross-vane, W-weir and J-Hook vane structures: Their description, design and application for stream stabilization and river restoration. In: Proc. ASCE Conf. “Wetland Engineering and River Restoration”, Reston, USA (CD-ROM).
  • 21. Scurlock, S.M., C.I. Thornton, and S.R. Abt (2011), One-dimensional modeling techniques for energy dissipation in U-weir grade-control structures. In: Proc. ASCE Congress “World Environmental and Water Resources”, 2496–2507.
  • 22. Scurlock, S.M., A.L. Cox, C.I. Thornton, and D.C. Baird (2012a), Maximum velocity effects from vane-dike installations in channel bends. In: Proc. ASCE Congress “World Environmental and Water Resources”, 2614–2626, DOI: 10.1061/9780784412312.261.
  • 23. Scurlock, S.M., C.I. Thornton, and S.R. Abt (2012b), Equilibrium scour downstream of three-dimensional grade-control structures, J. Hydraul. Eng. ASCE 138,2, 167–176, DOI: 10.1061/(ASCE)HY.1943-7900.0000493.
  • 24. Shields, F.D., S.S. Knight, and C.M. Cooper (1995), Incised stream physical habitat restoration with stone weirs, Regul. River. 10,2–4, 181–198, DOI: 10.1002/rrr.3450100213.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-2cbbbecd-9a98-4d50-9916-4cd7a287debc
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