Reduction of bend scour with an air-bubble screen – morphology and flow patterns
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Cited by (26)
Study of counteracting the secondary flow in open channel bends
2021, Ain Shams Engineering JournalCitation Excerpt :Many investigations have experimentally studied the protection of banks at shapely channel bend through air bubbles screen. Dugué et al.[10]studied experimentally the impact of the bubbles screen on the morphology configurations under live-bed conditions and the scour hole depths in the sharply open channels bend 193°, they deduced that the bubbles screen significantly reduced the scour about 50% and reduced the deposition at the inner bank. Dugué et al. [11,12] studied the transverse location of the bubbles screen related to the outer bank and showed that air bubbles are most effective when near the outer bank.
Research on the plume stability of air bubble curtains under low transverse flow velocity environment in dredging engineering
2021, Ocean EngineeringCitation Excerpt :By setting a bubble curtain system, a barrier can be formed at the bubble curtain to isolate the water on both sides and control the diffusion of the dredged materials. DuguÉ et al. (2013) investigated the effect of bubble curtains on the bed morphology and the potential for change. Scouring and silting outside the channel will endanger the stability of the bund or reduce the navigable width of the channel.
Dynamics and management of siltation in a macro-tidal marina: The case of La rochelle marina, France
2020, Ocean and Coastal ManagementCitation Excerpt :The first efficient research was initiated by the Port of Hamburg in the 1970s (Christiansen, 1987), and many studies on siltation regulation have followed, mostly in Germany, Netherlands and in Belgium (Hofland et al., 2001; Kirby, 2003; Stoschek and Zimmerman, 2006; Winterwep, 2005). The first type of solution consists of the use of “anti-sedimentation structures”, such as groins, mud traps, Current-Deflection-Walls (CDW) and bubble curtains located at the vicinity of the entrance section (Decrop et al., 2013; Dugué et al., 2013; Winterwep et al., 1994). These structures are supposed to keep a significant part of the sediment out of the port and thus, reduce the siltation maintenance.
Countermeasure of river bend scour using a combination of submerged vanes and riprap
2018, International Journal of Sediment ResearchCitation Excerpt :Jamieson et al. (2013) found that submerged barbs could successfully redirect the high velocity core away from the outer bank and prevent erosion of the floodplain at the exiting channel bend. Dugue et al. (2013) showed that bubble screens reduce bend scour by about 50% at the outer bank and consequently deposition at the inner bank also is reduced. Recently, laboratory experiments were done by Cunninghaml and Lyn (2016) with erodible-bed and banks in order to study the performance of a field of bendway weirs in reducing the erosion of the outer banks.
Causes of planform stability of a low-energy meandering gravel-bed river (Cher River, France)
2017, GeomorphologyCitation Excerpt :Most of the free meanders described in the literature are subject to quite high lateral instability (e.g., Nanson and Hickin, 1986; Gilvear et al., 2000; Leteinturier et al., 2000; Geerling et al., 2006; Gautier et al., 2007; Hooke, 2007, 2008; Magdaleno and Fernandes-Yuste, 2011). Beyond the fundamental questions about their formation and dynamics, the interest of these systems mainly lies in their associated high ecological value and the risk of erosion resulting from a shift in the channel (e.g., Lewin et al., 1977; Salo et al., 1986; Malavoi and Souchon, 1996; Piégay et al., 1997; Larsen and Greco, 2002; Ward et al., 2002; Lagasse et al., 2004; Florsheim et al., 2008; Roca et al., 2009; Ollero, 2010; Dugué et al., 2013). In contrast, meanders displaying long-term stability have been much less extensively studied — probably because their ecological diversity is assumed to be less than that of unstable meanders and also because of their limited social demand, as they do not threaten riverine buildings, engineering works (roads, bridges, pipes, etc.), or agricultural land.
Development and application of a braided river model with non-uniform sediment transport
2015, Advances in Water Resources
Note: The original manuscript of this paper was received in Mar. 2012. The revised version was received in Dec. 2012. Discussion open until Mar. 2014.