Investigation the Effective Parameters on the Drag Coefficient in Rigid and Flexible Vegetation

Document Type : Research Paper

Authors

1 Ph.D. candidate, Hydraulic Structures Department, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

2 Professor, Hydraulic Structures Department, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

3 Assoiciated Professor, Hydraulic Structures Department, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

Abstract

Rivers are known as the main sources of surface water in the world, which experience seasonal fluctuations in water level. These resources have severe damage to human societies and nature in flood conditions and have irreparable consequences in the drought seasons. Optimal utilization of these resources with maintaining the environmental conditions of the waterway and minimizing flood damage is considered one of the river engineering goals. Since the conventional methods of river management are imposed serious environmental threats on waterways and wetlands, consideration to these water resources requires attention to issues related to plant ecosystems, solving challenges of coastal bed erosion and predict the condition and management of the river in the future (Callow, 2012; Dawson and Haslam, 1983; Fan et al., 2013; Rose et al., 2010; Rowinski et al., 2018). One of the strategies that cause loss of flow energy in the river improves the hydrological system and river ecosystem is the presence of vegetation in the river banks and floodplains. Native vegetation in floodplains and coastal forests plays an important role in conserving waterway ecosystems, flood management, coastal protection in urban lands and agriculture adjacent to the river (Fathi-Moghadam, 1996). Vegetation will also control the width of the river and increase the stability of the shores by absorbing and settling suspended sediments in river banks. The plant species along rivers and waterways are composed of various vegetative components, mainly affected by the environmental conditions of their habitat, including the distance from the waterway bed, hydrological characteristics of the river, climatic and soil conditions. Obviously, the effect of each plant species in the ecosystem cycle varies and for each section of the river, a specific combination of plants will create optimal conditions.

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Main Subjects


  • Aberle, J. and Järvelä, J. 2013. Flow resistance of emergent rigid and flexible floodplain vegetation. Journal of Hydraulic Research, 51, 33-45.

 

  • Aberle, J. and Järvelä, J. 2015. Rivers–physical, fluvial and environmental processes Hydrodynamics of vegetated channels. Springer.

 

  • Afzalimehr, H. and Setayesh,P. 2013. Investigation on Logarithmic and Coles Laws under Different Emergent Vegetation Patches. Journal of Hydraulics, 13(1), 47-62.

 

  • Afzalimehr, H. and Subhasish, D. 2009. Influence of bank vegetation and gravel bed on velocity and Reynolds stress distributions. International Journal of Sediment Research, 24, 236-246.

 

  • Bączyk, A., Wagner, M., Okruszko, T. and Grygoruk, M. 2018. Influence of technical maintenance measures on ecological status of agricultural lowland rivers–Systematic review and implications for river management. Science of the Total Environment, 627, 189-199.

 

  • Bennett, S. J. and Simon, A. 2004. Riparian vegetation and fluvial geomorphology, American Geophysical Union.

 

  • Caroppi, G. and Järvelä, J. 2022. Shear layer over floodplain vegetation with a view on bending and streamlining effects. Environmental Fluid Mechanics, 1-32.

 

  • Caroppi, G., Västilä, K., Järvelä, J., Rowiński, P. M. and Giugni, M. 2019. Turbulence at water-vegetation interface in open channel flow: Experiments with natural-like plants. Advances in Water Resources, 127, 180-191.

 

  • Chen, Z., Jiang, C. and Nepf, H. 2013. Flow adjustment at the leading edge of a submerged aquatic canopy. Water Resources Research, 49, 5537-5551.

 

  • Cheng, N.-S. 2013. Calculation of drag coefficient for arrays of emergent circular cylinders with pseudofluid model. Journal of Hydraulic Engineering, 139, 602-611.

 

  • D’ippolito, A., Calomino, F., Alfonsi, G. and Lauria, A. 2021. Flow Resistance in Open Channel Due to Vegetation at Reach Scale: A Review. Water, 13(2), 116.

 

  • D’ippolito, A., Lauria, A., Alfonsi, G. and Calomino, F. 2018. Flow resistance in open channel with rigid emergent vegetation. Proceedings of the 5th IAHR Europe Congress—new challenges in hydraulic research and engineering Trento, Italy.

 

  • De vriend, H. J., Van koningsveld, M., Aarninkhof, S. G., De vries, M. B. and Baptist, M. J. 2015. Sustainable hydraulic engineering through building with nature. Journal of Hydro-environment research, 9(2), 159-171.

 

  • Duan, J. G., Barkdoll, B. and French, R. 2006. Lodging velocity for an emergent aquatic plant in open channels. Journal of Hydraulic Engineering, 132(10), 1015-1020.

 

  • Fathi-Moghadam, M. and Kouwen, N. 1997. Nonrigid, nonsubmerged, vegetative roughness on floodplains. Journal of Hydraulic Engineering, 123(1), 51-57.

 

  • Fathi-Moghadam, M. 1996. Momentum Absorption in Non-rigid, Non-submerged, Tall Vegetation Along Rivers [microform], Thesis (Ph.D.),University of Waterloo.

 

  • Fathi-Moghadam, M., Davoudi, L. and Motamedi-Nezhad, A. 2018. Modeling of solitary breaking wave force absorption by coastal trees. Ocean Engineering, 169, 87-98.

 

  • Fathi-Moghadam, M., Kashefipour, M., Ebrahimi, N. and Emamgholizadeh, S. 2011. Physical and numerical modeling of submerged vegetation roughness in rivers and flood plains. Journal of Hydrologic Engineering, 16(11), 858-864.

 

  • Findlay, S. 1995. Importance of surface‐subsurface exchange in stream ecosystems: The hyporheic zone. Limnology and oceanography, 40(1), 159-164.

 

  • Finnigan, J. 2000. Turbulence in plant canopies. Annual review of fluid mechanics, 32(1), 519-571.

 

  • Ghanbari-Adivi, E and Fathi-Maghadam, M. 2015. Vegetation impact on the drag coefficient and resistance of trees against shore waves. Journal of Irrigation Sciences and Engineering, 28(2), 103-112 (in persian)

 

  • Gosselin, F. P. and De langre, E. 2011. Drag reduction by reconfiguration of a poroelastic system. Journal of Fluids and Structures, 27(7),1111-1123,

 

  • Gurnell, A. 2014. Plants as river system engineers. Earth Surface Processes and Landforms, 39(1), 4-25.

 

  • Koloseus, H.J. and Davidian, J. 1996. Free-surface instability correlations and roughness-concentration effects on flow over hydrodynamically rough surfaces.

 

  • Kothyari, U. C., Hayashi, K. and Hashimoto, H. 2009. Drag coefficient of unsubmerged rigid vegetation stems in open channel flows. Journal of Hydraulic Research, 47(6), 691-699.

 

  • Krzeminska, D., Kerkhof, T., Skaalsveen, K. and Stolte, J. 2019. Effect of riparian vegetation on stream bank stability in small agricultural catchments. Catena, 172, 87-96.

 

  • Lashkar-Ara, B. and Fathi-Moghadam, M. 2010. Wall and bed shear forces in open channels. Research Journal of Physics, 4(1), 1-10.

 

  • Li, D., Huai, W.-X. and Liu, M.-Y. 2020. Investigation of the flow characteristics with one-line emergent canopy patches in open channel. Journal of Hydrology, 590, 125248.

 

  • Liu, X. and Zeng, Y. 2017. Drag coefficient for rigid vegetation in subcritical open-channel flow. Environmental Fluid Mechanics, 17(5), 1035-1050.

 

  • Marjoribanks, T. I., Hardy, R. J. and Lane, S. N. 2014. The hydraulic description of vegetated river channels: the weaknesses of existing formulations and emerging alternatives. Wiley Interdisciplinary Reviews: Water, 1(6), 549-560.

 

  • Nepf, H. M. 1999. Drag, turbulence, and diffusion in flow through emergent vegetation. Water resources research, 35(2), 479-489.

 

  • Nepf, H. M. 2012. Hydrodynamics of vegetated channels. Journal of Hydraulic Research, 50(30), 262-279.

 

  • Ozan, A. Y. 2018. Flow structure at the downstream of a one-line riparian emergent tree along the floodplain edge in a compound open-channel flow. Journal of Hydrodynamics, 30(3), 470-480.

 

  • Rowiński, P. M., Västilä, K., Aberle, J., Järvelä, J. and Kalinowska, M. B. 2018. How vegetation can aid in coping with river management challenges: A brief review. Ecohydrology and Hydrobiology, 18(4), 345-354.

 

  • Shi, H., Liang, X., Huai, W. and Wang, Y. 2019. Predicting the bulk average velocity of open-channel flow with submerged rigid vegetation. Journal of Hydrology, 572, 213-2

 

  • Tang, H., Tian, Z., Yan, J. and Yuan, S. 2014. Determining drag coefficients and their application in modelling of turbulent flow with submerged vegetation. Advances in Water Resources, 69, 134-145.

 

  • Vargas-luna, A., Crosato, A., Calvani, G. and Uijttewaal, S. 2016. Representing plants as rigid cylinders in experiments and models. Advances in water resources, 93, 205-222.

 

  • Wang, W.-J., Peng, W.-Q., Huai, W.-X., Katul, G. G., Liu, X.-B., Qu, X.-D. and Dong, F. 2019. Friction factor for turbulent open channel flow covered by vegetation. Scientific reports, 9(1), 1-16.

 

  • Wynn, T. and Mostaghimi, S. 2006. The effects of vegetation and soil type on streambank erosion, southwestern virginia, usa 1. JAWRA Journal of the American Water Resources Association, 42(1), 69-82.

 

  • Zhang, X., Lin, P. and Nepf, H. 2022. A wave damping model for flexible marsh plants with leaves considering linear to weakly nonlinear wave conditions. Coastal Engineering, 175, 10412

 

 

Volume 47, Issue 1
June 2024
Pages 15-31
  • Receive Date: 06 August 2022
  • Revise Date: 27 October 2022
  • Accept Date: 29 October 2022
  • Publish Date: 21 May 2024