A numerical model of beach morphological evolution due to waves and currents in the vicinity of coas

A numerical model was developed of beach morphological evolution in the vicinity of coastal structures. The model includes five sub-models for random wave transformation, surface roller development, nearshore wave-induced currents, sediment transport, and morphological evolution. The model was validated using high-quality data sets obtained during experiments with a T-head groin and a detached breakwater in the basin of the Large-scale Sediment Transport Facility at the Coastal and Hydraulics Laboratory in Vicksburg, Miss, USA. The simulations showed that the model reproduced well the wave conditions, wave-induced currents, and beach morphological evolution in the vicinity of coastal structures. Both salient and tombolo formation behind a T-head groin and a detached breakwater were simulated with good agreement compared to the measurements. (C) 2011 Elsevier B.V. All rights reserved.

[1]  I. Leont’yev.  Modelling of morphological changes due to coastal structures , 1999 .

[2]  H. N. Southgate,et al.  DETERMINISTIC PROFILE MODELLING OF NEARSHORE PROCESSES - PART 2: SEDIMENT TRANSPORT AND BEACH PROFILE DEVELOPMENT , 1993 .

[3]  Randall A. Wise,et al.  Sbeach: Numerical Model for Simulating Storm-Induced Beach Change, Report 3 : User's manual , 1989 .

[4]  Magnus Larson,et al.  Unified Sediment Transport Formulation for Coastal Inlet Application , 2007 .

[5]  I. Tsanis,et al.  ICEM: Integrated Coastal Engineering Model , 2005 .

[6]  Nicholas C. Kraus,et al.  NMLONG: Numerical Model for Simulating Longshore Current. Report 2. Wave-Current Interaction, Roller Modeling, and Validation of Model Enhancements , 2002 .

[7]  Barbara Zanuttigh,et al.  Analysis of far-field erosion induced by low-crested rubble-mound structures , 2005 .

[8]  Akira Watanabe.  3-Dimensional Numerical Model of Beach Evolution , 1987 .

[9]  Magnus Larson,et al.  A formula for longshore sediment transport in the Swash , 2007 .

[10]  H. D. Vriend,et al.  A morphological behaviour model for the outer delta of mixed-energy tidal inlets , 1994 .

[11]  Yafei Jia,et al.  Development and Validation of a Quasi-Three-Dimensional Coastal Area Morphological Model , 2006 .

[12]  Mark B. Gravens,et al.  Physical model investigation of morphology development at headland structures , 2007 .

[13]  J. W. Elder.  The dispersion of marked fluid in turbulent shear flow , 1959, Journal of Fluid Mechanics.

[14]  G. Stelling,et al.  Development and validation of a three-dimensional morphological model , 2004 .

[15]  David G. Hamilton,et al.  Establishing uniform longshore currents in a large-scale sediment transport facility , 2001 .

[16]  Nicholas C. Kraus,et al.  Reservoir model of ebb-tidal shoal evolution and sand bypassing , 2000 .

[17]  M. Larson,et al.  Model of Nearshore Waves and Wave-Induced Currents around a Detached Breakwater , 2010 .

[18]  Morphological Modelling: A Tool For Optimisation of Coastal Structures , 2007 .

[19]  P. Work,et al.  Mesoscale sediment transport at southeastern U.S. tidal inlets : Conceptual model applicable to mixed energy settings , 1999 .

[20]  Tom E. Baldock,et al.  Numerical solutions of the sediment conservation law; a review and improved formulation for coastal morphological modelling , 2006 .

[21]  D. Roelvink,et al.  North-coast of Texel: a comparison between reality and prediction , 1999 .

[22]  Michele Capobianco,et al.  Modelling of coastal evolution on yearly to decadal time scales , 2003 .

[23]  Nicholas C. Kraus,et al.  SBEACH: Numerical Model for Simulating Storm-Induced Beach Change. Report 2. Numerical Formulation and Model Tests , 1990 .

[24]  Julio A. Zyserman,et al.  Controlling spatial oscillations in bed level update schemes , 2002 .

[25]  Yoshimi Goda.  Examination of the influence of several factors on longshore current computation with random waves , 2006 .

[26]  D. Roelvink,et al.  Modelling storm impacts on beaches, dunes and barrier islands , 2009 .

[27]  Robert G. Dean,et al.  Equilibrium Beach Profiles: Characteristics and Applications , 1991 .

[28]  Yan Ding,et al.  Development and Application of a Coastal and Estuarine Morphological Process Modeling System , 2008 .

[29]  Wen Long,et al.  A numerical scheme for morphological bed level calculations , 2008 .

[30]  Magnus Larson,et al.  A numerical model of nearshore waves, currents, and sediment transport , 2009 .

[31]  Julio A. Zyserman,et al.  Modelling morphological processes in the vicinity of shore-parallel breakwaters , 2002 .

[32]  William R. Dally,et al.  A modeling investigation of the breaking wave roller with application to cross‐shore currents , 1995 .

[33]  R. Deigaard,et al.  Quasi-three-dimensional modelling of the morphology of longshore bars , 2007 .

[34]  Robert G. Dean,et al.  Wave height variation across beaches of arbitrary profile , 1985 .

[35]  Mark B. Gravens,et al.  Data Report: Laboratory Testing of Longshore Sand Transport by Waves and Currents; Morphology Change Behind Headland Structures , 2007 .

[36]  James R Houston.  The Coastal Structure Debate: Public and Policy Aspects , 2003 .

[37]  J. A. Roelvink,et al.  Medium-term 2DH coastal area modelling , 1993 .

[38]  B. G. Ruessink,et al.  The behaviour of nearshore bars on the time scale of years: a conceptual model , 2000 .

[39]  Akira Watanabe,et al.  Numerical Prediction Model of Three-Dimensional Beach Deformation Around a Structure , 1986 .

[40]  Ida Brøker,et al.  Intercomparison of coastal area morphodynamic models , 1997 .

[41]  Nicholas C. Kraus,et al.  GENESIS: Generalized Model for Simulating Shoreline Change. Report 1. Technical Reference , 1989 .

[42]  B. Zanuttigh.  Numerical modelling of the morphological response induced by low-crested structures in Lido di Dante, Italy , 2007 .

[43]  J. Roelvink,et al.  Design and development of DELFT3D and application to coastal morphodynamics , 1995 .

[44]  Magnus Larson,et al.  A general formula for non-cohesive bed load sediment transport , 2005 .

[45]  Ernest R. Smith,et al.  Temporal and spatial variations of surf-zone currents and suspended sediment concentration , 2002 .

[46]  Hajime Mase.  Multi-Directional Random Wave Transformation Model Based on Energy Balance Equation , 2001 .

[47]  Robert O. Reid,et al.  Numerical Model for Storm Surges in Galveston Bay , 1968 .

[48]  Magnus Larson,et al.  Dredging Research Program: NMLONG: Numerical Model for Simulating the Longshore Current. Report 1. Model Development and Tests. , 1991 .