A numerical study of the flow patterns around midchannel islands in lowland rivers and their possible biogeomorphological impacts

Yıl 2023, Cilt: 10 Sayı: 3, 154 - 175, 30.09.2023

Naghmeh Heidari , Murat Aksel , Oral Yağcı , Manousos Valyrakis

https://doi.org/10.30897/ijegeo.1320654

Öz

Midchannel islands (MCIs) are instream geomorphic units generally emerge in lowland rivers. Despite their significant ecomorphological services in the river ecosystem, the flow patterns around these self-forming riparian landforms and their impacts on aquatic life are not fully understood yet. Understanding the flow pattern around these formations enables practitioners to produce cost-effective, sustainable, and eco-friendly river management projects and strategies, forming the motivation of this study. Herein, the secondary flow pattern around MCIs was analyzed by employing a RANS-based numerical model. Flow around the simplified bodies was simulated to give a more precise analysis regarding flow-island interactions. Once the numerical validation process was completed for the cylinder using an experimental dataset, the validated model was implemented for islands (streamlined island, vertically sloped island (VSI), and realistically sloped island (RSI)). Analysis of the model results revealed the following key findings: 1) the RSI acted like a streamlined object and produced weaker lee-wake vortices with a longer recovery distance compared to the streamlined island and the VSI, 2) the RSI gained a better-streamlined form near the bed than near the water surface due to enhanced elongation, 3) this situation in the RSI case generated highly variable flow patterns along the depth behind the MCI, and 4) due to the three-dimensional geometry of the RSI, the generated large-scale vortices propagated asymmetrically towards the sides of the channel rather than remaining around the centerline.

Anahtar Kelimeler

computational fluid dynamics, midchannel island, lowland rivers, wake hydrodynamics, secondary flow

Kaynakça

• Abernathy, B., Rutherford, I.D. (1999). Guidelines for stabilizing streambanks with riparian vegetation. Technical Report 99/10, Cooperative Research Centre for Catchment Hydrology, Parkville, Victoria, 30 pp.
• Aksel, M., Yagci, O., Kirca, V.S.O., Erdog, E., Heidari, N. (2021). A comparative analysis of coherent structures around a pile over rigid-bed and scoured-bottom. Ocean Eng., 226, 108759. doi.10.1016/j.oceaneng.2021.108759.
• Ashmore, P.E. (1993). Anabranch confluence kinetics and sedimentation processes in gravel-braided streams. In Braided Rivers, Best, J. L., Bristow, C.S., eds., Geological Society, London, Special Publication, 75, 129-146. doi.10.1144/GSL.SP.1993.075.01.08.
• Ashworth, P.J. (1996). Mid-channel bar growth and its relationship to local flow strength and direction. Earth Surf. Process. Landforms, v. 21, 103–123. Ashworth, P.J., Best, J.L., Roden, J.E., Bristow, C.S., Klaassen, G.J. (2000). Morphological evolution and dynamics of a large, sand braid-bar, Jamuna River, Bangladesh. Sedimentology, 47(3), 533–555. doi.1046/j.1365-3091.2000.00305.x
• Baxter, C., Hauer, F.R., Woessner, W.W. (2003). Measuring groundwater–stream water exchange: new techniques for installing minipiezometers and estimating hydraulic conductivity. T. Am. Fish. Soc., 132, 493–502.
• Baykal, C., Sumer, B.M., Fuhrman, D.R., Jacobsen, N.G., Fredsøe, J. (2015). Numerical investigation of flow and scour around a vertical circular cylinder. Phil. Trans. R. Soc., A 373 (2033), 20140104. doi.10.1098/rsta.2014.0104.
• Beisel, J., Usseglio-Polatera, P., Thomas, S., Moreteau J.C. (1998). Stream community structure in relation to spatial variation: the influence of mesohabitat characteristics. Hydrobiologia, 389, 73–88. doi.10.1023/A:1003519429979.
• Bell, M.C. (1991). Fisheries Handbook of Engineering Requirements and Biological Criteria. Fish Passage Development and Evaluation Program, Corps of Engineers, North Pacific Division, Portland, Oregon, 322 pp.
• Bennett, S., Wu W., Alonso, C.V., Wang, S.Y. (2008). Modeling fluvial response to in-stream woody vegetation: Implications for stream corridor restoration. Earth Surf. Process. Landforms, 33(6), 890–909. doi.10.1002/esp.1581.
• Boisclair, C.D. Tang, M. (1993). Empirical analysis of the influence of swimming pattern on the net energetic cost of swimming in fishes. J. Fish Biol., 42:183. doi.10.1111/j.1095-8649.1993.tb00319.x.
• Boulton, A.J. Foster, J.G. (1998). Effects of buried leaf litter and vertical hydrologic exchange on hyporheic water chemistry and fauna in a gravel-bed river in northern New South Wales, Australia. Freshwater Biol., 40, 229–243. doi.10.1046/j.1365-2427.1998.00345.x.
• Brierley, G.J., Fryirs, K.A. (2005). Geomorphology and River Management: Applications of the River Styles Framework. 398 pp., Blackwell, Malden, Mass.
• Brookes, A. (1994). River channel change. In The Rivers Handbook, Volume 2, Calow, P., Petts. G., eds., Blackwell: Oxford, 55–75.
• Bunn, S.E., Arthington, A.H. (2002). Basic Principles and Ecological Consequences of Altered Flow Regimes for Aquatic Biodiversity. Environ. Manag., 30, 492–507. doi.10.1007/s00267-002-2737-0.
• Callow, J.N., Smettem, K.R.J. (2007). Channel response to a new hydrological regime in southwestern Australia. Geomorphology, 84(3–4), 254–276. doi.10.1016/j.geomorph.2006.01.043.
• Carson, M.A. (1984). The meandering-braided river threshold: a reappraisal. J. Hydrol., 73, 315– 334. doi.10.1016/0022-1694(84)90006-4.
• Chang, M.-H., Tang, T.Y., Ho, C.-R., Chao, S.-Y. (2013a). Kuroshio-induced wake in the lee of Green Island off Taiwan. J. Geophys. Res. Oceans, 118, 1508–1519. doi. 10.1002/jgrc.20151.
• Chang, W.Y., Constantinescu, G., Lien, H.G., Tsai, W.F., Lai, J.S., Loh, C.H. (2013b). Flow structure and sediment entrainment mechanisms around bridge piers of varying geometrical complexity. J. Hydraul. Eng., 812–826. doi.10.1061/(ASCE)HY.1943-7900.0000742.
• Collier, J.S., Oggioni, F., Gupta, S., Moreno, D.G., Trentesaux, A., Batist M.De. (2015), Streamlined islands and the English Channel megaflood hypothesis. Global Planet. Change, 135, 190–206. doi.10.1016/j.gloplacha.2015.11.004.
• Corenblit, D., Davies, N.S., Steiger, J., Gibling, M.R., Bornette, G. (2015). Considering river structure and stability in the light of evolution: feedbacks between riparian vegetation and hydrogeomorphology. Earth Surf. Process. Landforms, 40, 189–207. doi.10.1002/esp.3643.
• Corenblit, D., Steiger, J., Gurnell, A.M., Tabacchi, E., Roques, L. (2009). Control of sediment dynamics by vegetation as a key function driving biogeomorphic succession within fluvial corridors. Earth Surf. Process. Landforms, 34(13), 1790–1810. doi.10.1002/esp.1876.
• Coutis, P.F. Middleton J.H. (1999). Flow-topography interaction in the vicinity of an isolated, deep ocean island. Deep Sea Res. I, 46(9), 1633–1652. doi.10.1016/S0967-0637(99)00007-2.
• Dent, C.L., Grimm, N.B., Fisher, S.G. (2001) Multiscale effects of surface–subsurface exchange on stream water nutrient concentrations. J. N. Am. Bentholl. Soc., 20,162–181. doi.10.2307/1468313.
• Edwards, P.J., Kollmann, J., Gurnell, A.M., Petts, G.E., Tockner K., Ward J.V. (1999). A conceptual model of vegetation dynamics on gravel bars of a large Alpine River. Wetl. Ecol. Manag., 7, 141–153. doi.10.1023/A:1008411311774.
• Eekhout, J.P.C., Hoitink, A.J.F., Mosselman, E. (2013). Field experiment on alternate bar development in a straight sand-bed stream. Water Resour. Res., 49, 8357–8369. doi.10.1002/2013WR014259.
• Euler, T., Zemke, J., Rodrigues, S., Herget, J. (2014). Influence of inclination and permeability of solitary woody riparian plants on local hydraulic and sedimentary processes. Hydrol. Process., 28(3), 1358–1371. doi.10.1002/hyp.9655.
• Flowscience. (2019). Flow-3D User Manual.
• Francis R.A. (2006). Allogenic and autogenic influences upon riparian vegetation dynamics. Area, 38, 453–464. doi.10.1111/j.1475-4762.2006.00706.x.
• Francis, R.A., Corenblit, D. Edwards, P.J. (2009). Perspectives on biogeomorphology, ecosystem engineering and self-organization in island-braided fluvial ecosystems. Aquat. Sci., 71, 290. doi.10.1007/s00027-009-9182-6.
• Garner, G., Malcolm, I.A., Sadler, J.P., and Hannah, D.M. (2017). The role of riparian vegetation density, channel orientation and water velocity in determining river temperature dynamics. J. Hydrol., 553, 471-485. doi.10.1016/j.jhydrol.2017.03.024.
• Garner, G., Malcolm, I.A., Sadler, J.P., Hannah, D.M., (2014). What causes cooling water temperature gradients in a forested stream reach? Hydrol. Earth Syst. Sci., 18(12), 5361–5376. doi.10.5194/hess-18-5361-2014.
• Guo, B., Ahmadian, R., Evans, P., Falconer, R.A. (2020). Studying the Wake of an Island in a Macro-tidal Estuary. Water, 12(5), 1225. doi.10.3390/w12051225.
• Gurnell, A.M., Petts, G.E. (2002) Island-dominated landscapes of large floodplain rivers, a European perspective. Freshw. Biol., 47, 581–600. doi.10.1046/j.1365-2427.2002.00923.x.
• Gurnell, A.M., Bertoldi, W., Corenblit, D. (2012). Changing River channels: The roles of hydrological processes, plants and pioneer fluvial landforms in humid temperate, mixed load, gravel bed rivers. Earth Sci. Rev., 111, 129–141. doi.10.1016/ j.earscirev.2011.11.005.
• Gurnell, A.M., Petts, G.E., Hannah, D.M., Smith, B.P.G., Edwards, P.J., Kollmann, J., Ward, J.V., Tockner, K. (2001). Riparian vegetation and island formation along the gravel-bed Fiume Tagliamento, Italy. Earth Surf. Process. Landforms, 26 (1), 31–62. doi.10.1002/1096-9837(200101)26:1<31::AID-ESP155>3.0.CO;2-Y
• Gurnell, A.M., Tockner, K., Edwards, P.J., Petts, G.E. (2005). Effects of deposited wood on biocomplexity of river corridors. Front. Ecol. Environ., 3(7), 377–382. doi.10.1890/1540-9295(2005)003[0377:EODWOB]2.0.CO;2.
• Hannah, D.M., Malcolm, I.A., Soulsby, C., Youngson, A.F. (2004). Heat exchanges and temperatures within a salmon spawning stream in the Cairngorms, Scotland: seasonal and sub-seasonal dynamics. River Res. Appl., 20(6), 635–652. doi.10.1002/rra.771.
• Heidari, N., Yagci, O., Aksel, M. (2021). Midchannel islands in lowland river corridors and their impacts on flow structure and morphology: A numerical based conceptual analysis. Ecol. Eng., 173, 106419, doi.10.1016/j.ecoleng.2021.106419.
• Heller, V. (2011). Scale effects in physical hydraulic engineering models. J. Hydraul. Res., 49(3), 293–306. doi.10.1080/00221686.2011.578914.
• Heywood, K.J., Barton, E.D., and Simpson J.H. (1990). The effects of flow disturbance by an oceanic island. J. Mar. Res., 48, 55–73. doi.10.1357/ 002224090784984623.
• Hinch, S. G., Rand, P.S. (1998). Swim speeds and energy use of upriver-migrating sockeye salmon (Oncorhynchus nerka): role of local environment and fish characteristics. Can. J. Fish. Aquat. Sci., 55,1821–1831 (1998). doi.10.1139/f98-067.
• Holmes N.T.H. (1998). The river restoration project and its demonstration reaches. In Rehabilitation of Rivers, Waal, L. C., Large, A. R. G., Wade, P. M., eds., Wiley: New York, 133–148.
• Hooke, J. M. (1986). The significance of mid-channel bars in an active meandering river. Sedimentology, 33, 839–850. doi.10.1111/j.1365-3091.1986.tb00986.x.
• Hubble, T.C.T., Docker, B.B., Rutherfurd, I.D. (2010). The role of riparian trees in maintaining riverbank stability: a review of Australian experience and practice. Ecol. Eng., 36, 292–304. doi.10.1016/j.ecoleng.2009.04.006. Hughes, S.A. (1993). Physical models and laboratory techniques in coastal engineering. World Scientific, London.
• Hynes, H.B.N. (1970). The ecology of running waters. Toronto. University of Toronto Press. 555 pp. Jowett, I. Richardson, J. (1990). Microhabitat preferences of benthic invertebrates in a New Zealand river and the development of in‐stream flow‐habitat models for Deleatidium spp. New Zeal. J. Mar. Freshwat., 24: 19–30. doi.10.1080/00288330.1990.9516399.
• Keylock, C.J., Constantinescu, G., Hardy, R.J. (2012). The application of computational fluid dynamics to natural river channels: Eddy resolving versus mean flow approaches. Geomorphology, 179, 1–20. doi.10.1016/j.geomorph.2012.09.006.
• Kim, H.S., Kimura, I., Park, M. (2018). Numerical simulation of flow and suspended sediment deposition within and around a circular patch of vegetation on a rigid bed. Water Resour. Res., 54, 7231–7251. doi.10.1029/2017WR021087.
• Kitsikoudis, V., Kirca, V.S.O., Yagci, O., Celik, M.F. (2017). Clear-water scour and flow field alteration around an inclined pile. Coast. Eng., 129, 59–73. doi.10.1016/j.coastaleng.2017.09.001. Kitsikoudis, V., Yagci, O., Kirca, V.S.O. (2020). Experimental analysis of flow and turbulence in the wake of neighboring emergent vegetation patches with different densities. Environ. Fluid Mech., 20, 1417–1439. doi.10.1007/s10652-020-09746-6.
• Kitsikoudis, V., Yagci, O., Kirca, V.S.O., Kellecioglu D. (2016). Experimental investigation of channel flow through idealized isolated tree-like vegetation. Environ. Fluid Mech., 16, 1283–1308. doi.10.1007/s10652-016-9487-7. Knighton, A.D. (1972) Changes in a braided reach. Bulletin of the Geological Society of America, 83(12), 3813–3822. doi.10.1130/0016-7606(1972)83[3813:CIABR]2.0.CO;2.
• Kollmann, J., Vieli, M., Edwards, P.J., Tockner, K., Ward, J.V. (1999). Interactions between vegetation development and island formation in the Alpine River Tagliamento. Appl. Veg. Sci., 2, 25–36. doi.10.2307/1478878.
• Larsen, B. E., Fuhrman, D. R., Sumer, B. M. (2016). Simulation of wave-plus-current scour beneath submarine pipelines. J. Waterw. Port Coast. Ocean Eng., 142(5), 04016003.
• Latrubesse, E.M., Stevaux, J.C. (2015). The Anavilhanas and Mariua archipelagos: fluvial wonders from the Negro River, Amazon Basin. In Landscapes and Landforms of Brazil, Vieira, B.C., Salgado, A.A.R., Santos, L.J.C., eds, Springer, p. 267p. doi.10.1007/978-94-017-8023-0_14.
• Leigh, D.S. (2006). Terminal Pleistocene braided to meandering transition in rivers of the southeastern USA. Catena, 66(1–2), 155–160. doi.10.1016/j.catena.2005.11.008.
• Leli, I.T., Stevaux, J.C. (2021). Lake-islands: a distinct morphology of river systems. J. S. Am. Earth Sci., 111, 103424. doi.10.1016/j.jsames.2021.103424.
• Leli, I.T., Stevaux, J.C., Assine, M.L. (2018). Genesis and sedimentary record of blind channel and islands of the Anabranching River: an evolution model. Geomorphology, 302, 35–45. doi.10.1016/j.geomorph.2017.05.001.
• Leli, I.T., Stevaux, J.C., Assine, M.L. (2020). Origin, evolution, and sedimentary records of islands in large anabranching tropical rivers: the case of the Upper Parana River, Brazil. Geomorphology, 358, 107–118. doi.10.1016/j.geomorph.2020.107118.
• Leopold, L.B Wolman, M.G. (1957). River channel patters: braided, meandering and straight. U.S Geol. Surv. Prof. Pap., 282-B, pp. 39–85.
• Li, Z., Wang, Z., Pan, B.; Zhu, H., Li, W. (2014). The development mechanism of gravel bars in rivers. Quat. Int., 336, 73-79. doi.10.1016 /j.quaint.2013.12.039.
• Liao, J.C. Cotel, A. (2013). Effects of Turbulence on Fish Swimming in Aquaculture. In Swimming Physiology of Fish Palstra, A., Planas, J., eds., Springer, Berlin, Heidelberg. doi.10.1007/978-3-642-31049-2_5.
• Lloyd, N., Quinn, G., Thoms, M., Arthington, A., Gawne, B., Humphries, P., Walker, K. (2003) Does flow modification cause geomorphological and ecological response in rivers? A literature review from an Australian perspective. Technical Report 1 ⁄ 2004, CRC for Freshw. Ecol., ISBN 0-9751642-02.
• Lloyd, P.M., Stansby, P.K. (1997a). Shallow water flow around model conical islands of small side slope. I: Surface piercing. J. Hydr. Eng., ASCE, 123(12), 1057–1067. doi.10.1061/(ASCE)0733-9429(1997)123:12(1057).
• Lloyd, P.M., Stansby, P.K. (1997b). Shallow-water flow around model conical islands of small side slope. II: Submerged. J. Hydraul. Eng., 123(12), 1068–1077. doi.10.1061/(ASCE)0733-9429(1997)123:12(1068). Luchi, R., Zolezzi, G., Tubino, M. (2010). Modelling mid-channel bars in meandering channels. Earth Surf. Process. Landf., 35, 902–917. doi.10.1002/esp.1947.
• Lupandin, A.I. (2005). Effect of Flow Turbulence on Swimming Speed of Fish. Biol. Bull. Russ. Acad. Sci., 32, 461–466. doi.10.1007/s10525-005-0125-z.
• Maazouzi, C., Claret, C., Dole-Olivier, M.-J., Marmonier, P. (2013). Nutrient dynamics in river bed sediments: effects of hydrological disturbances using experimental flow manipulations. J. Soils Sediments, 13, 207–219. doi.10.1007/s11368-012-0622-x.
• Majd, S.F., Yagci, O., Kirca, V.S.O., Kitsikoudis, V., and Lentsiou, E. (2016). Flow and turbulence around an inclined pile. In Proceedings of the International Ocean and Polar Engineering Conference; Rhodes, Greece.
• McLaughlin, R.L. D.L.G. Noakes. (1998). Going against the flow: An examination of the propulsive movements made by young brook trout in streams. Can. J. Fish. Aquat. Sci., 55: 853–860. doi.10.1139/f97-308.
• Minshall, G.W. (1984) Aquatic insect-substratum relationships. In: Resh, V. H., Rosenberg, D.M. ed., The ecology of aquatic insects. New York. Praeger Publishers. 358–400.
• Moir, K.J., Soulsby, C., Youngson, A.F. (2002). Hydraulic and sedimentary controls on the availability and use of Atlantic salmon (Salmo salar) spawning habitat in the River Dee system, north-east Scotland. Geomorphology, 45, 291–308. doi.10.1016/S0169-555X(01)00160-X.
• Murray, A., Paola, C. (1994). A cellular model of braided rivers. Nature, 371, 54–57. doi.10.1038/371054a0. Naiman, R.J., Decamps, H., Pollock, M. (1993). The role of riparian corridors in maintaining regional biodiversity. Ecol. Appl., 3, 209-212. doi.10.2307/1941822.
• Nakamura F. (2003). Restoration strategies for rivers, floodplains and wetland in Kushiro Mire and Shibetsu River, northern Japan. Ecol. Civ. Eng., 5: 217–232 (in Japanese with English abstract). doi.10.3825/ece.5.217.
• Nakano, D., Nakamura, F. (2008). The significance of meandering channel morphology on the diversity and abundance of macroinvertebrates in a lowland river in Japan. Aquatic Conserv: Mar. Freshw. Ecosyst., 18, 780–798. doi.10.1002/aqc.885.
• Nanson, G.C., Knighton, A.D. (1996). Anabranching rivers: their cause, character and classification. Earth Surf. Process. Landf., 21, 217–239.
• Nepf, H.M. (1999). Drag, turbulence, and diffusion in flow through emergent vegetation. Water Resour. Res., 35(2), 479–489. doi.10.1029/1998WR900069.
• Nicholas, A.P., Sambrook-Smith, G.H. (1999). Numerical simulation of three-dimensional flow hydraulics in a braided river. Hydrol. Process., 13, 913–929.
• Nie, H.W.De. (1987). The decrease in aquatic vegetation in Europe and its consequences for fish populations. EIFAC Occasional Paper 19. FAO, Rome, 88 pp.
• Ock, G, Gaeuman, D, McSloy, J, Kondolf, G.M. (2015). Ecological functions of restored gravel bars, the Trinity River, California. Ecol. Eng., 83, 49–60. doi.10.1016/j.ecoleng.2015.06.005.
• Ouro, P., Wilson, C.A.M.E., Evans, P., Angeloudis, A. (2017). Large-eddy simulation of shallow turbulent wakes behind a conical island. Phys. Fluids, 29, 126601. doi.10.1063/1.5004028.
• Poff, N.L., Zimmerman, J.K.H. (2010). Ecological responses to altered flow regimes: a literature review to inform the science and management of environmental flows. Freshw. Biol., 55, 194–205. doi.10.1111/j.1365-2427.2009.02272.x.
• Poff, N.L., Allan, J. D, Bain, M.B., Karr, J.R., Prestegaard, K.L, Richter, B., Sparks, R., Stromberg, J. (1997). The natural flow regime: a new paradigm for riverine conservation and restoration. Bio. Sci., 47, 769–784. doi.10.2307/1313099.
• Roulund, A., Sumer, B.M., Fredsøe, J., Michelsen, J. (2005). Numerical and experimental investigation of flow and scour around a circular pile. J. Fluid Mech., 534, 351–401. doi.10.1017/S0022112005004507.
• Ryan, D.K., Yearsley, J.M., Kelly-Quinn, M. (2013). Quantifying the effect of semi-natural riparian cover on stream temperatures: implications for salmonid habitat management. Fish. Manage. Ecol., 20(6), 494–507. doi.10.1111/fme.12038.
• Schoelynck, J., Groote, T.De., Bal K., Vandenbruwaene, W., Meire P., Temmerman, S. 2012. Self-organized patchiness and scale-dependent bio-geomorphic feedbacks in aquatic river vegetation. Ecography, 35, 760–768. doi.10.1111/j.1600-0587.2011.07177.x.
• Skłodowski, M. Kiedrzyńska, E., Kiedrzyński, M., Urbaniak, M., Zielińska, K.M., Kurowski, J.K., Zalewski M. (2014). The role of riparian willows in phosphorus accumulation and PCB control for lotic water quality improvement. Ecol. Eng., 70, 1-10. doi.10.1016/j.ecoleng.2014.03.088.
• Smith, D.L., Goodwin, R.A., Nestler, J.M. (2014). Relating turbulence and fish habitat: A new approach for management and research. Rev. Fish. Sci. Aquac., 22, 123–130. doi.10.1080/10641262.2013.803516.
• Sumer, B.M., Fredsøe, J. (1997). Hydrodynamics Around Cylindrical Structures. World Scientific.
• Surian, N., and Rinaldi, M. (2004). Channel adjustments in response to human alteration of sediment fluxes: examples from Italian rivers. In Golosov, Belyaev, V., Walling, D.E., eds., Sediment Transfer Through the Fluvial System, Publication 288. IAHS, 276–282.
• Tal, M., Paola, C. (2007). Dynamic single-thread channels maintained by the interaction of flow and vegetation. Geology, 35 (4), 347–350. doi.10.1130/ G23260A.1.
• Thornton, C.I., Abt, S.R., Clary, W.P. (1997). Vegetation influence on small stream siltation. J. Am. Water Resour. Assoc., 33(6), 1279–1288. doi.10.1111/j.1752-1688.1997.tb03552.x.
• Tooth, S., Nanson, G.C. (1999). Anabranching rivers on the Northern Plains of arid central Australia. Geomorphology, 29, 211–233. doi.10.1016/S0169-555X(99)00021-5.
• Toth, L.A. (1993). The ecological basis of the Kissimmee River restoration plan. Florida Scientist, 56, 25–51. Valyrakis, M., Liu, D., Turker, U., Yagci, O. (2021). The role of increasing riverbank vegetation density on flow dynamics across an asymmetrical channel. Environ. Fluid Mech., 21, 643–666. doi.10.1007/s10652-021-09791-9.
• Wilson, C.A.M.E, Yagci, O., Rauch, H.-P., Olsen, N.R.B. (2006). 3D numerical modelling of a willow vegetated river/floodplain system. J. Hydrol., 327 (1–2), 13–21. doi.10.1016/j.jhydrol.2005.11.027.
• Wintenberger, C.L., Rodrigues, S., Claude, N., Jugé, P., Bréhéret, J.-G., Villar, M. (2015). Dynamics of nonmigrating mid-channel bar and superimposed dunes in a sandy-gravelly river (Loire River, France). Geomorphology, 248, 185–204. doi.10.1016/j.geomorph.2015.07.032.
• Wyrick, J.R., Klingeman, P.C., 2010. Proposed fluvial island classification scheme and its use for river restoration. River Res. Applic., 27, 814–825. doi.10.1002/rra.1395.
• Yagci, O., Strom K. (2022). Reach-scale experiments on deposition process in vegetated channel: Suspended sediment capturing ability and backwater effect of instream plants. J. Hydrol., 127612. doi.10.1016/j.jhydrol.2022.127612.
• Yagci, O., Celik, M.F., Kitsikoudis, V., Kirca, V.S.O., Hodoglu, C., Valyrakis, M., Duran, Z., Kaya S. (2016). Scour patterns around isolated vegetation elements. Adv. Water Resour., 97, 251-265. doi.10.1016/j.advwatres.2016.10.002.
• Yagci, O., Yildirim, I., Celik, M.F., Kitsikoudis, V., Duran, Z., Kirca, V.S.O. (2017). Clear water scour around a finite array of cylinders. Appl. Ocean Res., 68, 114–129. doi.10.1016/j.apor.2017.08.014.
• Zhang, P., Qiao, Y., Grenouillet, G., Lek, S., Cai, L., Chang, J. (2021). Responses of spawning thermal suitability to climate change and hydropower operation for typical fishes below the Three Gorges Dam. Ecol. Indic., 121, 107186. doi.10.1016/j.ecolind.2020.107186.