Analysis of Monami waves in aquatic vegetation - Texas A&M University (TAMU) Scholar

2009 by World Scientific Publishing Co. Pte. Ltd. All Rights Reserved. Flow through flexible submerged vegetation exhibits Kelvin-Helmholtz (KH) vortices at the top of the stems causing a periodic movement that is referred to as interfacial monami waves. Using linear instability theory, Patil et al. (2006) derived simplified expressions for amplitude and periods of monami wave in terms of easily measurable vegetation parameters. These expressions are used in this paper for validation and found to be matching with the corresponding experimental data of past researchers. The bending angle of the stem as one of the key parameters that is related to monami amplitude and period is emphasized. Assuming KH vortices as a function of overflow depth, equations for monami waves are also proposed using linear wave theory. The proposed models of monami waves presented in this paper can be applied to applicable hydrodynamic situations in inland or coastal wetlands for better prediction of turbulence, nutrients or sediments between obstructed vegetation flow and free overflow flow.

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