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The Effect of Flexible Vegetation in Gravity Currents with Large Salinity in Composite Cross Section

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Abstract

In this study experiments in a laboratory tank to examine the effect of bed with vegetation on the motion of gravity currents between fresh and salt water with high salinity were performed. The shape of the tank was composite (trapezoidal at the bottom and rectangular at the top). The tank was separated into two reservoirs with a vertical gate. One of the reservoirs was filled with salt water (sw) with various densities from 1050 till 1090 kg/m3. These values of densities simulates and represents the spread of liquid waste. The release of pollutants into rivers and wetlands, the spread of an oil spill into the ocean are examples of gravity currents that have detrimental environmental consequences. The second reservoir was filled with fresh water (w) and vegetation at the bed. When the gate is opened, the heavier liquid propagates towards the tank with the lightest liquid which is displaced along the free surface in the opposite direction. The results showed that the shape of the valley plays a very important role on the front velocity of gravity currents. The low water height and the presence of trapezoidal shape decreases the velocity of the gravity current. The increase of the initial height (for fresh and high salinity water) also produces gravity currents with higher velocity.

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References

  1. Simpson JE (1982) Gravity currents in the laboratory, atmosphere and ocean. Ann Rev of Fluid Mech 14:213–234

    Article  Google Scholar 

  2. Keulegan GH (1958) The motion of saline fronts in still water. Nat Bur Stand Rep 99:785–799

    Google Scholar 

  3. Oldham C, Sturman J (2001) The effect of emergent vegetation on convective flushing in shallow wetlands: Scaling and experiments. Limn Ocean 46(6):1486–1493

    Article  Google Scholar 

  4. Shin JO, Dalziel SB, Linden PF (2004) Gravity currents produced by lock-exchange. J Fluid Mech 521:1–34

    Article  Google Scholar 

  5. Antenucci JP, Brooks JD, Hipsey MR (2005) A simple model for quantifying cryrtospridium transport, dilution and potential risks in reservoirs. J Am Water Works Assoc 97:86–93

    Article  CAS  Google Scholar 

  6. Tanino Y, Nepf HM, Kulis PS (2005) Gravity currents in aquatic canopies. Water Resour Res 41:1–9

    Article  Google Scholar 

  7. Monaghan JJ, Meriaux CA, Huppert HE, Monaghan JM (2009) High Reynolds number gravity currents along V-shaped valleys. Eur J Mech B/Fluids 28:651–659

    Article  Google Scholar 

  8. Monaghan JJ, Meriaux CA, Huppert HE, Mansour J (2009) Particulate gravity currents along V-shaped valleys. J Fluid Mech 631:419–440

    Article  CAS  Google Scholar 

  9. Keramaris E, Prinos P (2016) Gravity currents in a Vegetated Valley of trapezoidal shape. J Appl Fluid Mech 9(3):1051–1056

    Article  Google Scholar 

  10. Zhou J, Cenedese C, Williams T, Ball M, Venayagamoorthy SK, Nokes RI (2017) On the propagation of gravity currents over and through a submerged array of circular cylinders. J Fluid Mech 831:394

    Article  Google Scholar 

  11. Ottolenghi L, Cenedese C, Adduce C (2017) Entrainment in a dense current flowing down a rough sloping bottom in a rotating fluid. J Phys Ocean 47(3):485–498

    Article  Google Scholar 

  12. Cenedese C, Nokes R, Hyatt J (2018) Lock-exchange gravity currents over rough bottoms. Env Fluid Mech 18(1):59–73

    Article  Google Scholar 

  13. Yin X, He Y, Lu C, Gao S, Liu Q (2020) Experimental Study on Front Spreading of Lock-Exchange Gravity Current with Long Lock Length. J Eng Mech 146(1):04019113

    Article  Google Scholar 

  14. Vardakostas S, Kementsetsidis S, Keramaris E (2020) Saline gravity currents with large density difference with fresh water in a valley of trapezoidal shape. Envir Sci Proc 2(1):64

    Google Scholar 

  15. De Falco MC, Adduce C, Cuthbertson A, Negretti ME, Laanearu J, Malcangio D, Sommeria J (2021) Experimental study of uni-and bi-directional exchange flows in a large-scale rotating trapezoidal channel. Phys Fluids 33(3):036602

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. Department of Civil Engineering, University of Thessaly, Pedion Areos, 38334, Volos, Greece

    E. Keramaris,  N. Thanos & L. Tsintsifas

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  1. E. Keramaris
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  2. N. Thanos
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  3. L. Tsintsifas
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Correspondence to E. Keramaris.

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Keramaris, ., Thanos, . & Tsintsifas, L. The Effect of Flexible Vegetation in Gravity Currents with Large Salinity in Composite Cross Section. Exp Tech 46, 607–614 (2022). https://doi.org/10.1007/s40799-021-00500-1

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  • DOI: https://doi.org/10.1007/s40799-021-00500-1

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