Journal articles: 'Beach nourishment'

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Gijsman, Rik, Jan Visscher, and Torsten Schlurmann. "A METHOD TO SYSTEMATICALLY CLASSIFY DESIGN CHARACTERISTICS OF SAND NOURISHMENTS." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 95. http://dx.doi.org/10.9753/icce.v36.papers.95.

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The decades of collected monitoring data of coastal profiles in combination with the decades of experience with sand nourishments in the Wadden Sea, forms an invaluable basis to study the inter-site efficiency of sand nourishment design. However, a systematic data-driven study of this type needs to be applicable for the inter-site varying (i) nourishment design strategies, (ii) coastal monitoring data sets and (iii) natural morphodynamics of the shorelines, respectively. This study introduces a four-step method able to systematically classify the influence of individual nourishment design parameters on the nourishment lifetime (i.e. the period of influence on the natural dynamics of a coastal profile). With the non-linear and adaptive principle component analysis (PCA) method, nourishment lifetimes of beach- and shoreface nourishments are extracted from data sets that describe different natural morphodynamics. Based on an application of the method to a limited number of nourishments placed in two coastal areas in the Netherlands (Ameland) and Germany (Sylt), increasing nourishment concentration, alongshore nourishment length and absolute nourishment peak elevation seem to increase the lifetime of beach- and shoreface nourishments. Nourishment lifetimes at profile more downstream seem to decrease for beach nourishments, but increase for shoreface nourishments. The method supports inclusion of additional coastal profiles and parameters related to the nourishment design, natural morphodynamics of the coastal profile and hydrodynamic forcing, to quantify nourishment design influences on nourishment lifetimes at different locations.

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Muñoz-Perez, Juan J., Shari L. Gallop, and Luis J. Moreno. "A Comparison of Beach Nourishment Methodology and Performance at Two Fringing Reef Beaches in Waikiki (Hawaii, USA) and Cadiz (SW Spain)." Journal of Marine Science and Engineering 8, no. 4 (April 9, 2020): 266. http://dx.doi.org/10.3390/jmse8040266.

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Fringing reefs have significant impacts on beach dynamics, yet there is little research on how they should be considered in beach nourishment design, monitoring, and conservation works. Thus, the behavior and characteristics of nourishment projects at two reef protected beaches, Royal Hawaiian Beach (RHB) in Hawaii, USA, and Victoria Beach (VB) in Cadiz, Spain, are compared to provide transferable information for future nourishment projects and monitoring in fringing reef environments. The nourishment cost at RHB was nine times higher than VB. This is partly due to lower total volume and a more complex placement and spreading method at RHB, despite the much closer borrow site at RHB. There was a significant difference in post-nourishment monitoring frequency and assessment of accuracy. RHB elevation was monitored quarterly for 2.7 years at 30 m-spaced profiles, compared to 5 years of biannual surveys of 50 m-spacing at VB. An additional problem related to the presence of reefs at both RHB and VB was estimating the beach volume increase after nourishment, due to variable definitions of the ‘beach’ area and high alongshore variability in reef topography. At sites where non-native sediment is used, it is imperative to understand how wave and current energy changes due to reefs will influence nourishment longevity. Thus, differences in erosion and accretion mechanisms at both beaches have been detected, though are still little understood. Moreover, discrepancies in sediment porosity between the two sites (which should be surveyed in future nourishments) have been found, probably due to differences in the nourishment sand transportation and distribution methods. In summary, more dialogue is needed to explicitly consider the influence of fringing reefs on coastal processes and beach nourishment projects.

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Braz Teixeira, Sebastião. "Reducing sea cliffs hazards in pocket beaches through beach nourishment on the Barlavento Coast (Algarve, Portugal)." Revista de Gestão Costeira Integrada 21, no. 4 (December 2021): 215–26. http://dx.doi.org/10.5894/rgci-n378.

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Tourism based on “sun and beach” is the main economic activity in the Algarve region. A considerable part of the beaches of the Barlavento coast corresponds to embedded sand accumulated along the irregular lacework-like coastline of rocky cliffs cut into Miocene calcarenites. The pattern of touristic occupation in the Algarve and the geodynamics of the rocky sea cliffs, characterized by discontinuous and intermittent occurrence of slope mass movements, result in a high level of risk to beach users along pocket beaches. In order to mitigate the risk associated with the cliff geodynamics, artificial beach nourishment was performed in Castelo and Coelha pocket beaches on the Barlavento Coast, in 2014, increasing the beach area by 3.5 times. The effects of the beach nourishment on the occupation patterns of those beaches along the 2006-2016 decade, before and after the beach nourishment, are herein presented and discussed. Occupancy data were obtained covering different seasons along the year, by counting the number of beach users, regardless of age, using periodic and systematic photographs taken at strategic points that provide full coverage of the beach areas. Before the beach nourishments the area of dry sand outside high and moderate hazard zones, measured at half-tide under average summer wave conditions was 500 m2 at Coelha beach and 800 m2 at Castelo beach. After beach nourishment the same area increased to 6700 m2 at Coelha beach and 7100 m2 at Castelo beach. Results show that, following the beach fill, beach occupation by recreational users naturally shifted seaward, moving out from the cliff hazard areas. After the intervention, the occupation of high and moderate hazard areas reduced significantly, from 37 % to 11 % in Castelo beach and from 59 % to 27 % in Coelha beach. Keywords: beach nourishment; hazard; rocky cliffs; Algarve; Portugal.

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Giardino, Alessio, Eleni Diamantidou, Stuart Pearson, Giorgio Santinelli, and Kees Den Heijer. "A Regional Application of Bayesian Modeling for Coastal Erosion and Sand Nourishment Management." Water 11, no. 1 (January 1, 2019): 61. http://dx.doi.org/10.3390/w11010061.

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This paper presents an application of the Bayesian belief network for coastal erosion management at the regional scale. A “Bayesian ERosion Management Network” (BERM-N) is developed and trained based on yearly cross-shore profile data available along the Holland coast. Profiles collected for over 50 years and at 604 locations were combined with information on different sand nourishment types (i.e., beach, dune, and shoreface) and volumes implemented during the analyzed time period. The network was used to assess the effectiveness of nourishments in mitigating coastal erosion. The effectiveness of nourishments was verified using two coastal state indicators, namely the momentary coastline position and the dune foot position. The network shows how the current nourishment policy is effective in mitigating the past erosive trends. While the effect of beach nourishment was immediately visible after implementation, the effect of shoreface nourishment reached its maximum only 5–10 years after implementation of the nourishments. The network can also be used as a predictive tool to estimate the required nourishment volume in order to achieve a predefined coastal erosion management objective. The network is interactive and flexible and can be trained with any data type derived from measurements as well as numerical models.

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Li, Yuan, Chi Zhang, Yu Cai, Mingxiao Xie, Hongshuai Qi, and Yigang Wang. "Wave Dissipation and Sediment Transport Patterns during Shoreface Nourishment towards Equilibrium." Journal of Marine Science and Engineering 9, no. 5 (May 17, 2021): 535. http://dx.doi.org/10.3390/jmse9050535.

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Implementing shoreface nourishment is an effective method to protect sandy beaches. A better understanding of the equilibrium mechanism of shoreface nourishments is necessary for coastal engineering designs and constructions. Two experiments on the beach profile equilibrium of the shoreface nourishment are carried out under mild wave conditions on the reflective and intermediate beach. It is observed that the shoreface nourishment increases local wave height and strengthens wave nonlinearity by its shallow water depth. The most intense wave breaking dissipation has been found on the crest of the shoreface nourishment, and the distribution of wave energy dissipation rate is more uniform on the quasi-equilibrium profile than that on the initial profile. A process-based numerical model is used to reproduce bed profile evolution successfully. On that basis, it is found that onshore bedload transport is the primary cause for the onshore migration of the shoreface nourishment. The magnitude of bedload transport decreases during the evolution of the shoreface nourishment towards equilibrium. The most intense sediment transport rate occurs over the shoreface nourishment or in front of the shoreline, depending on the ’lee effect’ of the nourishment. Furthermore, the effects of incident wave height, wave period, and sea-level rise on the equilibrium profile of the shoreface nourishment under mild wave conditions are analyzed.

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Liu, Gen, Hongshuai Qi, Feng Cai, Jun Zhu, Gang Lei, Jianhui Liu, Shaohua Zhao, and Chao Cao. "Morphodynamic Evolution of Post-Nourishment Beach Scarps in Low-Energy and Micro-Tidal Environment." Journal of Marine Science and Engineering 9, no. 3 (March 9, 2021): 303. http://dx.doi.org/10.3390/jmse9030303.

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Beach scarps are commonly associated with nourishment. Large and persistent beach scarps not only affect the performance of beach nourishment, but also are safety hazards to tourists. In this study, the morphological evolution of beach scarps was examined at a nourished beach in a low-energy and micro-tidal environment. Topographic surveys of nine beach profiles were carried out every 3–6 months after nourishment, lasting for nearly 4.5 years, combined with observed and simulated hydrodynamic data. The results showed that beach scarps were extensively developed after nourishment and migrated landward gradually. The formation of beach scarps was attributed to the higher designed berm, while the migration was possibly initiated by the subsequent higher total water level connected with the irregular tides. However, scarps were completely removed by the first post-nourishment severe storm and had been long absent ever since although two other energetic storms approached. This was different from the result of previous studies, which could be attributed to the much gentler upper beach slope. These results highlighted that the first post-nourishment storm played a key role in the evolution of beach scarps at low-energy and micro-tidal nourished beaches. This study also proposed two methods of determining berm elevation in beach nourishment according to China’s experiences, which would be helpful for other countries’ beach nourishment projects.

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Kroon, Anna, Matthieu de Schipper, Sierd de Vries, and Stefan Aarninkhof. "Subaqueous and Subaerial Beach Changes after Implementation of a Mega Nourishment in Front of a Sea Dike." Journal of Marine Science and Engineering 10, no. 8 (August 20, 2022): 1152. http://dx.doi.org/10.3390/jmse10081152.

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Sandy nourishments can provide additional sediment to the coastal system to maintain its recreational or safety function under rising sea levels. These nourishments can be implemented at sandy beach systems, but can also be used to reinforce gray coastal infrastructure (e.g., dams, dikes, seawalls). The Hondsbossche Dunes project is a combined shoreface, beach, and dune nourishment of 35 million m3 sand. The nourishment was built to replace the flood protection function of an old sea-dike while creating additional space for nature and recreation. This paper presents the evolution of this newly created sandy beach system in the first 5 years after implementation based on bathymetric and topographic surveys, acquired every three to six months. A significant coastline curvature is created by the nourishment leading to erosion in the central 7 km bordered by zones with accretion. However, over the five-year period, net volume losses from the project area were less than 5% of the initial nourished sand volume. The man-made cross-shore beach profile rapidly mimics the characteristics of adjacent beaches. The slope of the surfzone is adjusted within two winters to a similar slope. The initially wide beaches (i.e., up to 225 m) are reduced to about 100 m-wide. Simultaneously, the dune volume has increased and the dune foot migrated seaward at the entire nourished site, regardless of whether the subaqueous profile gained or lost sediment. Our results show that the Hondsbossche Dunes nourishment, built with a natural slope and wide beach, created a positive sediment balance in the dune for a prolonged period after placement. As such, natural forces in the years after implementation provided a significant contribution to the growth in dune volume and related safety against flooding.

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Mendes, Diogo, Joaquim Pais-Barbosa, Paulo Baptista, Paulo A. Silva, Cristina Bernardes, and Celso Pinto. "Beach Response to a Shoreface Nourishment (Aveiro, Portugal)." Journal of Marine Science and Engineering 9, no. 10 (October 13, 2021): 1112. http://dx.doi.org/10.3390/jmse9101112.

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In Aveiro (NW coast of Portugal), a coastal monitoring programme was carried out in sequence of a shoreface nourishment intervention (over than 2 M m3) performed in 2020. In this programme, almost one year of biweekly subaerial topographies and quarterly bathymetric surveys have been collected along a 10 km coastal stretch between June 2020 and June 2021. In this study, topographic and bathymetric surveys were analysed to assess the expectation that if the shoreface nourishment is located in sufficiently shallow water depths, its landward movement will feed adjacent beaches and, consequently, increase the subaerial beach volume. Results show that the subaerial beach volume is well correlated with the 1.05 m (above MSL) isoline displacement through time. While the seaward limit of the shoreface nourishment moved landwards about 200 m, the shoreline proxy (isoline of 1.05 m) displayed a maximum seaward displacement of 60 m. The displacement of the shoreline proxy was highly variable in space, along the 10 km coastal stretch, and also in time, during storm events. During such events, both landward and seawards displacement of the shoreline proxy took place, depending on the spatial position. Moreover, while beaches close to the initial shoreface nourishment intervention displayed faster accretion patterns than those located farther away, the well-defined onshore movement of the shoreface nourishment did not result in a considerable beach volume increase. The achieved results were also compared against case studies of shoreface nourishments with similar volumes performed worldwide.

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Mendes, Diogo, Joaquim Pais-Barbosa, Paulo Baptista, Paulo A. Silva, Cristina Bernardes, and Celso Pinto. "Beach Response to a Shoreface Nourishment (Aveiro, Portugal)." Journal of Marine Science and Engineering 9, no. 10 (October 13, 2021): 1112. http://dx.doi.org/10.3390/jmse9101112.

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In Aveiro (NW coast of Portugal), a coastal monitoring programme was carried out in sequence of a shoreface nourishment intervention (over than 2 M m3) performed in 2020. In this programme, almost one year of biweekly subaerial topographies and quarterly bathymetric surveys have been collected along a 10 km coastal stretch between June 2020 and June 2021. In this study, topographic and bathymetric surveys were analysed to assess the expectation that if the shoreface nourishment is located in sufficiently shallow water depths, its landward movement will feed adjacent beaches and, consequently, increase the subaerial beach volume. Results show that the subaerial beach volume is well correlated with the 1.05 m (above MSL) isoline displacement through time. While the seaward limit of the shoreface nourishment moved landwards about 200 m, the shoreline proxy (isoline of 1.05 m) displayed a maximum seaward displacement of 60 m. The displacement of the shoreline proxy was highly variable in space, along the 10 km coastal stretch, and also in time, during storm events. During such events, both landward and seawards displacement of the shoreline proxy took place, depending on the spatial position. Moreover, while beaches close to the initial shoreface nourishment intervention displayed faster accretion patterns than those located farther away, the well-defined onshore movement of the shoreface nourishment did not result in a considerable beach volume increase. The achieved results were also compared against case studies of shoreface nourishments with similar volumes performed worldwide.

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Wang, Hsing-Yu, Hui-Ming Fang, and Yun-Chih Chiang. "Yanliao Beach Nourishment Methods." IOP Conference Series: Earth and Environmental Science 171 (July 2018): 012029. http://dx.doi.org/10.1088/1755-1315/171/1/012029.

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11

Dean, R. G., and Chul‐Hee Yoo. "Beach‐Nourishment Performance Predictions." Journal of Waterway, Port, Coastal, and Ocean Engineering 118, no. 6 (November 1992): 567–86. http://dx.doi.org/10.1061/(asce)0733-950x(1992)118:6(567).

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Shibutani, Yoko, Yuhei Matsubara, Masamitsu Kuroiwa, and Noriko Yao. "EXPERIMENTAL STUDY ON THE EFFECTS OF THE OFFSHORE NOURISHMENT USING THE COASER SANDS WITH THE CROSS-SHORE SEASONAL CHANGE." Coastal Engineering Proceedings 1, no. 33 (December 14, 2012): 38. http://dx.doi.org/10.9753/icce.v33.sediment.38.

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In recent decades, beach erosions have become severe at sandy beach in the world. The coarser sand nourishment has been noticed in Japan because of the stabilization of the beach coast. However the performance is not clear. Therefore in this study, laboratory experiments were conducted for the beach nourishment using the coarser sand. Through of this experiment, the effect of the coarser sand nourishment was investigated.

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Guimarães, André, Carlos Coelho, Fernando Veloso-Gomes, and Paulo A. Silva. "3D Physical Modeling of an Artificial Beach Nourishment: Laboratory Procedures and Nourishment Performance." Journal of Marine Science and Engineering 9, no. 6 (June 3, 2021): 613. http://dx.doi.org/10.3390/jmse9060613.

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Beach nourishment represents a type of coastal defense intervention, keeping the beach as a natural coastal defense system. Altering the cross-shore profile geometry, due to the introduction of new sediments, induces a non-equilibrium situation regarding the local wave dynamics. This work aims to increase our knowledge concerning 3D movable bed physical modeling and beach nourishment impacts on the hydrodynamics, sediment transport, and morphodynamics. A set of experiments with an artificial beach nourishment movable bed model was prepared. Hydrodynamic, sediment transport, and morphological variations and impacts due to the presence of the nourishment were monitored with specific equipment. Special attention was given to the number and positioning of the monitoring equipment and the inherent constraints of 3D movable beds laboratory tests. The nourishment induced changes in the beach dynamics, leading to an increase in the flow velocities range and suspended sediment concentration, and effectively increasing the emerged beach width. Predicting and anticipating the morphological evolution of the modeled beach has a major impact on data accuracy, since it might influence the monitoring equipment’s correct position. Laboratory results and constraints were characterized to help better define future laboratory procedures and strategies for increasing movable bed models’ accuracy and performance.

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Ishikawa, Toshinori, Takaaki Uda, Toshiro San-nami, Jun-ichi Hosokawa, and Tetsuyuki Tako. "POSSIBILITY OF OFFSHORE DISCHARGE OF NOURISHMENT SAND IN TERMS OF SAND VOLUME AND GRAIN SIZE COMPOSITION." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 47. http://dx.doi.org/10.9753/icce.v36.papers.47.

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On the Shonan coast facing Sagami Bay, part of the nourishment sand was considered to be transported offshore, devaluing the effect of beach nourishment. Beach changes after the beach nourishment were investigated using the Narrow Multi-Beam survey data, which have been collected since 2002. Analysis of the sand volume and grain size composition in the subareas showed that the effect of the beach nourishment on the deposition of fine sediment in the offshore zone was negligible, and that the fine material in the offshore zone was mainly brought from the erosion of the river mouth terrace.

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Cai, Feng, Robert G. Dean, and Jianhui Liu. "BEACH NOURISHMENT IN CHINA: STATUS AND PROSPECTS." Coastal Engineering Proceedings 1, no. 32 (January 29, 2011): 31. http://dx.doi.org/10.9753/icce.v32.management.31.

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Many beach nourishment projects have been performed in China over the last 2 decades since the first project was completed in 1990 in Hong Kong. The history and distribution of beach nourishment in China is summarized in this paper. Considering the development of nourishment design and public perceptions, the history of beach fill in China can be summarized into 3 stages. In general, this paper shows the characteristics of 4 types of nourishment projects based on different environmental conditions, 4 typical nourished sites for each type were selected and described in detail respectively. Considering the current research status in China, recommendations and suggestions for future development are outlined, including such aspects as construction of more and larger projects, development of beach management strategies, a beach nourishment manual, research efforts on numerical models for sediment transport and post-project monitoring and evaluation.

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Huisman, Bastiaan, Dirk-Jan Walstra, Max Radermacher, Matthieu de Schipper, and Gerben Ruessink. "Observations and Modelling of Shoreface Nourishment Behaviour." Journal of Marine Science and Engineering 7, no. 3 (March 4, 2019): 59. http://dx.doi.org/10.3390/jmse7030059.

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Shoreface nourishments are commonly applied for coastal maintenance, but their behaviour is not well understood. Bathymetric data of 19 shoreface nourishments located at alongshore uniform sections of the Dutch coast were therefore analyzed and used to validate an efficient method for predicting the erosion of shoreface nourishments. Data shows that considerable cross-shore profile change takes place at a shoreface nourishment, while an impact at the adjacent coast is hard to distinguish. The considered shoreface nourishments provide a long-term (3 to ∼30 years) cross-shore supply of sediment to the beach, but with small impact on the local shoreline shape. An efficient modelling approach is presented using a lookup table filled with computed initial erosion–sedimentation rates for a range of potential environmental conditions at a single post-construction bathymetry. Cross-shore transport contributed the majority of the losses from the initial nourishment region. This transport was driven partly by water-level setup driven currents (e.g., rip currents) and increased velocity asymmetry of the waves due to the geometrical change at the shoreface nourishment. Most erosion of the nourishment takes place during energetic wave conditions ( H m 0 ≥ 3 m) as milder waves are propagated over the nourishment without breaking. A data-model comparison shows that this approach can be used to accurately assess the erosion rates of shoreface nourishments in the first years after construction.

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Pilarczyk, K. W., J. Van Overeem, and W. T. Bakker. "DESIGN OF BEACH NOURISHMENT SCHEME." Coastal Engineering Proceedings 1, no. 20 (January 29, 1986): 107. http://dx.doi.org/10.9753/icce.v20.107.

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An artificial beach nourishment used to replenish an eroding part of a coast may seem expensive and the need for repetition may discourage coastal managers. However, careful considerations of capital and maintenance cost frequently prove that it may be, in fact, the optimum solution. An added advantage is that the recreational function of the beach is preserved. In spite of a great number of research-reports and publications on coastal processes and beach nourishment, the practical applicability of this knowledge is still in an initial stage, i.e. formulating the general concepts and trying to test their validity and practical applicability. On the other hand, the solution of many practical coastal engineering problems cannot wait until complete understanding of these processes and the existing knowledge on this subject (though limited) should be made available for designers and managers involved in coastal engineering. This was the main reason for the Rijkswaterstaat (Dutch Public Works Department) to prepare a manual on artificial beach nourishment. In 1983, this Department established the task-group 'Profile Formation of Beaches', with the aim to study the relevant aspects of beach nourishment. These aspects concern among other things the influence of a beach fill on the coastal morphology and the environment, and the design and execution of a beach nourishment scheme. The members of the task-group originate from various governmental departments, research institutes (Delft Hydraulics) and private organisations (Volker Stevin Dredging, Zanen Verstoep Dredging Contractors). In addition to the members of the working-group some other persons and organizations (also outside the Netherlands) have contributed to the final report. The results of the studies have been described in a Manual on Beach Nourishment (Manual, 1986). This manual contains both theoretical and practical information, and is intended for persons and organisations who are involved in the prevention of beach erosion. Nearly all available and relevant literature to this subject has been incorporated. The actual paper reviews part of the contents of the Manual and summarizes aspects related to the aim, the different types and the design process of beach nourishment schemes.

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Kana, Timothy W., Haiqing L. Kaczkowski, and Steven B. Traynum. "FIVE KEY ELEMENTS FOR A SUSTAINABLE BEACH NOURISHMENT PROGRAM." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 17. http://dx.doi.org/10.9753/icce.v36.risk.17.

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Beach nourishment is increasingly the preferred method for maintaining eroding beaches along developed coasts. Although the goal and outcome are generally the same from place to placeâ€”add sand and create a wider beachâ€” the underlying causes of erosion tend to be site-specific (Dean 2002). As a result, beach nourishment performance and longevity fluctuate greatly, often with uncertainty of outcome. To increase the probability of success in projects and drawing from 35 years of experience, the authors apply five key elements at the preliminary design phase, which have enabled development of credible plans at an early stage in each project.

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de Alegria-Arzaburu, Amaia Ruiz, Ismael Mariño-Tapia, Rodolfo Silva, and Adrian Pedrozo-Acuña. "Post-nourishment beach scarp morphodynamics." Journal of Coastal Research 65 (January 2, 2013): 576–81. http://dx.doi.org/10.2112/si65-098.1.

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Roelse, P., J. Coosen, and F. A. J. Minneboo. "Beach nourishment and monitoring programme." Coastal Engineering 16, no. 1 (January 1991): 43–59. http://dx.doi.org/10.1016/0378-3839(91)90052-i.

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Fenical, Scott, Chris Barton, Jeff Peters, Frank Salcedo, and Keith Merkel. "ALBANY BEACH SHORELINE STABILIZATION AND BEACH/DUNE NOURISHMENT." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 36. http://dx.doi.org/10.9753/icce.v36.risk.36.

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The Albany Beach Restoration Project was initiated with the goal of stopping landfill erosion into San Francisco Bay, while creating aquatic habitat, and nourishing a pocket beach at McLaughlin Eastshore State Park, Albany, California. The site contains an existing sandy pocket beach which is unique to San Francisco Bay, and was formed by construction of the Albany Neck and Bulb, which was created as a landfill. Coastal engineering analysis, numerical modeling of coastal processes, and pocket beach morphology modeling were performed to evaluate and protect against erosion on the Albany Neck and prevent contaminant entry to the Bay, evaluate potential enhancement alternatives for the sandy pocket beach, and develop design criteria for living shorelines structures/habitat elements. In addition, analysis was performed to evaluate the stability of living shoreline structures, including a crescent reef with oyster shell nourishment, a pebble beach and groin system, avian roosting islands/breakwater elements, and tidepools.

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Kim, Hyun Dong, Shin-ichi Aoki, Nobuhisa Kobayashi, and Susumu Onaka. "THE EFFECTIVE METHOD OF BEACH NOURISHMENT PLACEMENT." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 66. http://dx.doi.org/10.9753/icce.v36.sediment.66.

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When erosion occurs, sandy beach cannot maintain the sufficient sand width and the foreshore slope becomes steeper by the frequent erosion effect. As a result, the beach is trapped in a vicious circle of becoming vulnerable by the incident waves. In order to repair or protect the erosive beach, beach nourishment can be used as a countermeasure while minimizing the environmental impacts. However, beach nourishment is not a permanent solution and requires periodic renourishment after several years. To alleviate such problem, minimizing the period of renourishment must be an economical alternative. In that respect, selecting the optimum grain size of the sand for the beach nourishment is very important. Generally, larger grain sized sand is more resistant to the erosion, thus extending the period of renourishment. In addition to selecting the optimum grain size of the sand nourishment, determining the durability as well as maintaining the familiarity of the users of the native sand should be considered.

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Jóia Santos, Catarina, Umberto Andriolo, and José C. Ferreira. "Shoreline Response to a Sandy Nourishment in a Wave-Dominated Coast Using Video Monitoring." Water 12, no. 6 (June 6, 2020): 1632. http://dx.doi.org/10.3390/w12061632.

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Beach nourishment is a soft engineering intervention that supplies sand to the shore, to increase the beach recreational area and to decrease coastal vulnerability to erosion. This study presents the preliminary evaluation of nourishment works performed at the high-energy wave-dominated Portuguese coast. The shoreline was adopted as a proxy to study beach evolution in response to nourishment and to wave forcing. To achieve this aim, images collected by a video monitoring system were used. A nourishment calendar was drawn up based on video screening, highlighting the different zones and phases where the works took place. Over the six-month monitoring period, a total amount of 25 video-derived shorelines were detected by both manual and automated procedures on video imagery. Nourishment works, realized in summer, enlarged the emerged beach extension by about 90 m on average. During winter, the shoreline retreated about 50 m due to wave forcing. Spatial analysis showed that the northern beach sector was more vulnerable and subject to erosion, as it is the downdrift side of the groin.

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Johnson, Cody L., Brian C. McFall, Douglas R. Krafft, and Mitchell E. Brown. "Sediment Transport and Morphological Response to Nearshore Nourishment Projects on Wave-Dominated Coasts." Journal of Marine Science and Engineering 9, no. 11 (October 27, 2021): 1182. http://dx.doi.org/10.3390/jmse9111182.

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Nearshore nourishments are constructed for shoreline protection from waves, to provide sediment nourishment to the beach profile, and to beneficially use dredged sediment from navigation channel maintenance. However, it is poorly understood how placement morphology and depth influence nearshore processes operated on wave-dominated coasts. This study investigates the wave fields, sediment transport, and morphological response to three common nearshore nourishment shapes, nearshore berm (elongated bar), undulated nearshore berm, and small discrete mounds, with numerical experiments utilizing the Coastal Modeling System. The nourishments are placed in depths between 3 m and 7 m with a volume of approximately 100,000 m3 and between 400 m and 1000 m in alongshore length. Numerical experiments are carried out in three distinct coastal settings with representative wave climates and geomorphology. Simulation results indicate that shallower, more continuous berms attenuate the most wave energy, while deeper, more diffuse placements retain more sediment. Results from this study improve the understanding of nearshore nourishment shapes and can support decision makers identifying the most appropriate construction technique for future nearshore nourishment projects.

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Kabiling, Michael B., Michael E. Trudnak, and Richard Bouchard. "EVALUATION OF SHORELINE STABILIZATION USING A HYBRID SHORELINE MORPHOLOGY MODEL." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 50. http://dx.doi.org/10.9753/icce.v36.sediment.50.

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The Fort Pierce Shore Protection Project, located in St. Lucie County, Florida, nourishes a 2.09-km Atlantic Ocean shoreline south of Fort Pierce Inlet on Floridaâ€™s east coast. After each beach nourishment, historical measurements indicate the beach fill erodes nonuniformly, with a hotspot along the northernmost 0.7 km requiring nourishment after about two years of normal wave regimes. However, storms can quickly erode the beach fill and require nourishment earlier than the normal two-year interval. Longshore transport carries most of the eroded fill to the south, creating a strong feeder-beach effect. This study evaluated several designs and combinations of coastal structures to produce more uniform erosion throughout the project area and to increase the nourishment interval. The study applied several state-of-the-art numerical models to evaluate the two-dimensional effect of a â€œcoastal structuresâ€ alternative on hydrodynamics, waves, sediment transport, and beach morphology.

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Coelho, Carlos, Raquel Silva, Francisco Veloso-Gomes, and Luis Rodrigues. "ARTIFICIAL NOURISHMENT AND SAND BY-PASSING IN THE AVEIRO INLET, PORTUGAL – NUMERICAL STUDIES." Coastal Engineering Proceedings 1, no. 32 (January 21, 2011): 99. http://dx.doi.org/10.9753/icce.v32.sediment.99.

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Artificial sand nourishment systems are a potential solution to mitigate erosion beach problems, having been applied in many cases around the world, especially in the U.S.A. and Australia. For the Aveiro inlet, the artificial sand by passing systems may be a good option, due to the availability of sediments accumulating at the north of the northern Aveiro inlet breakwater. A fixed artificial sand by-passing system can be proposed. However, fixed and continuous sand by-passing systems are the most expensive solutions. In order to reduce the economical aspect, periodic sand nourishment and semi-mobile systems are presented as an alternative. For those, different options of artificial nourishment can be proposed, depending on sediments volumes, location, distribution area, number of periodic operations, etc. Discussion about the results of the numerical simulations of shoreline evolution after different artificial nourishments scenarios at the southern part of the Aveiro inlet, in Portugal, is presented. Shoreline accretion/erosion rates, sediment transport volumes and profile sediment budgets have similar behaviors over time and along the coastal stretch, for all the tested scenarios. Generally, important coastal erosion can be mitigated with artificial nourishments and numerical modeling can help to improve the nourishments performance. For this open sandy coast, the sand nourishment simulations show better results near the deposit location for a period of time lower than 20 years. After that period, the nourishment effect is smaller. The southern profiles start benefiting with the nourishment after ten or more years.

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Ishikawa, Toshinori, Takaaki Uda, Toshiro San-nami, and Shusuke Watanabe. "FORMATION OF DYNAMICALLY STABLE LAKESHORE UNDER SEASONALLY CHANGING WAVE DIRECTION." Coastal Engineering Proceedings 1, no. 32 (January 29, 2011): 85. http://dx.doi.org/10.9753/icce.v32.sediment.85.

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In the Ukishima region of Lake Kasumigaura, beach nourishment along with the construction of groins has been carried out to recover a sandy beach. After the beach nourishment, part of the nourishment sand was transported away from the beach, turning around the tip of the downcoast groin owing to the oblique wave incidence in winter. To enhance the stability of the beach, the groins were extended and a spur dike was constructed. To design these structures, a numerical simulation using the BG model was carried out, and the optimum shapes were determined by taking into account the seasonally changing wave direction. The effectiveness of the spur dike was numerically evaluated using the BG model.

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Chien, Andy, Shelly Wu, Felix Tseng, and Amy Tang. "Geotextile Tubes Application on Beach Nourishment in UAE." International Journal of Environmental Science and Development 5, no. 5 (October 2014): 506–9. http://dx.doi.org/10.7763/ijesd.2014.v5.535.

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Martell, Raúl, Edgar Mendoza, Ismael Mariño-Tapia, Itxaso Odériz, and Rodolfo Silva. "How Effective Were the Beach Nourishments at Cancun?" Journal of Marine Science and Engineering 8, no. 6 (May 28, 2020): 388. http://dx.doi.org/10.3390/jmse8060388.

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Beach nourishment is generally seen as the preferred means of rectifying coastal erosion, due to its low environmental impact and natural evolution. The largest beach nourishment project ever carried out in Mexico took place on Cancun beach in 2006, as a response to the most intense hurricane season ever registered in Mexico, in 2005. After Hurricane Dean, in 2009, a second nourishment was conducted, which evidenced flaws in the design and execution of the first project. Previous investigations report that the need for beach re-fills directly correlates with wave energy. However, following a thorough revision of the extreme climatic events that occurred between 1978 and 2018, it has been found that the amount of erosion also depends on the frequency and duration of high energy events. The findings also show that the apparent success of the second nourishment is mainly associated with a decline in the number of extreme wave power events impacting the beach. In the conclusion to this paper, we share the knowledge gained, but not yet applied, in Mexico or elsewhere, regarding beach use, urbanization, and protection in beach planning.

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Van den Berg, N., A. Falqués, and F. Ribas. "SHORELINE SAND WAVES AND BEACH NOURISHMENTS." Coastal Engineering Proceedings 1, no. 32 (February 1, 2011): 102. http://dx.doi.org/10.9753/icce.v32.sediment.102.

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The effects of the feedback between the changing coastal morphology and the wavefield on the generation and propagation of large scale (O(1-10 km)) shoreline sand waves is examined with a quasi-2D morphodynamic model. Traditional shoreline change models do not include this feedback and are only able to describe diffusion of shoreline sand waves and furthermore they are unable to describe migration. It is found with the present model that if there is a dominant littoral drift, the feedback causes downdrift migration of coastline features no matter if they grow or decay. Consistently with previous studies, simulations show that a rectilinear coastline becomes unstable and sand waves tend to grow spontaneously from random perturbations, if the wave incidence angle is larger then about 42o (θc) at the depth of closure (high angle wave instability). The initial wavelengths at which the sand waves develop are 2-3 km and this is similar to previous linear stability analysis. The implications of high angle wave instability for beach nourishments are investigated. The nourished shoreline retreats initially due to cross-shore transport because the nourished profile is steeper than the equilibrium profile. When a dominant littoral drift is present, the nourishment also migrates downdrift. If the wave angle at the depth of closure is below θc the alongshore transport contributes to the diffusion of the nourishment. However, if the angle is above θc (constant high angle wave conditions) the diffusion is reversed and the nourishment can trigger the formation of a shoreline sand wave train. Numerical experiments changing the proportion of ‘high angle waves’ and ‘low angle waves’ in the wave climate show that relatively small proportions of low angle waves slow down the growth of sand waves. These simulations with more realistic wave climates show shoreline sand waves that migrate downdrift maintaining more or less the same amplitude for years.

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Valsamidis, Antonios, Dominic Reeve, Matthieu De Schipper, and Nicholas Dodd. "ENSEMBLE PREDICTION OF MEGA-NOURISMENT MORPHODYNAMIC EVOLUTION." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 41. http://dx.doi.org/10.9753/icce.v36.sediment.41.

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Mega-nourishment is an innovative soft coastal protection method (Stive et al., 2013) which was applied for first time in 2011 in the Netherlands. Although conventional nourishments are considerably smaller in size, and designed to maintain their sediment volume to the specific site of their application for as long as possible, mega-nourishments are expected to redistribute via the local hydrodynamic forcing their massive volume along a beach, and provide coastal protection at regional scale.

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Hallin, Caroline, Sierd de Vries, and Christa van IJzendoorn. "ENHANCE DUNE-BUILDING PROCESSES WITH NATURE-BASED NOURISHMENT DESIGN." Coastal Engineering Proceedings, no. 36v (December 28, 2020): 34. http://dx.doi.org/10.9753/icce.v36v.management.34.

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Vast coastal stretches around the world rely on dunes for flood protection. At the same time, the protection level of many dune systems can be undermined due to coastal erosion, sea-level rise, and greater population densities. To enhance dune building processes and the growth of coastal dunes, nature-based solutions, such as multi-purpose sand nourishments, are increasingly being implemented. However, the performance of the nourishment projects in terms of dune growth do not always match the expectations due to unforeseen supply-limiting factors (Hoonhout and de Vries, 2019). Sediment on a beach should be within a site-specific range of grain sizes to be available for pick up by the wind and deposition in the dunes. However, the grain-size characteristics do also influence several other supply-limiting factors, e.g., surface moisture, crust development, and beach slope, making nourishment design complicated. The process-based model Aeolis has been developed to predict aeolian transport rates considering several supply limiting factors. In this study, we introduce a new surface moisture functionality in Aeolis and demonstrate how the model can be used to optimize nourishment designs with respect to dune build-up. A number of test cases are presented to illustrate how grain size, sorting, and beach morphology are influencing aeolian transport rates.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/K_eiZ5kPk2g

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Murakami, Keisuke, and Khusnul Setia Wardani. "Evaluation of beach nourishment works on Miyazaki coast in Japan." MATEC Web of Conferences 276 (2019): 04001. http://dx.doi.org/10.1051/matecconf/201927604001.

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Miyazaki Coast have been suffering from severe erosion problem due to the shortage of sediment supply from rivers and the change of waves and nearshore currents by the construction of an offshore breakwater at Miyazaki Port. In order to reproduce a wide sandy beach, a beach nourishment project has been done since 2008 in combination with the installation of Sand-Packed containers that were placed in front of dune. A certain volume of nourishment sand has been installed for the sand fill works that cover Sand-Packed containers, and the rest has been dumped off the coast. The purpose of this research is to evaluate the effectiveness of beach nourishment works with using long-term bottom sounding data. This study discussed the effect of the beach nourishment on longshore sandbar evolution. The change of the sand volume in research area was also discussed in this study.

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Pagán, José I., Antonio J. Tenza-Abril, Luis Aragonés, Yolanda Villacampa, and Isabel López. "Classification of Sediment Quality according to Its Behavior in the Accelerated Particle Wear Test (APW)." Sustainability 13, no. 5 (March 1, 2021): 2633. http://dx.doi.org/10.3390/su13052633.

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One of the main problems faced in coastal management is the loss or destruction of beaches due to erosion. A considerable diversity of factors is involved in coastal erosion, which makes it a complex system to study. The quality of the material that constitutes the beach, as well as the choice of appropriate materials for its nourishment are two of the main ones. Therefore, to make future nourishment projects more sustainable and durable, this work proposes a sediment quality classification based on the physical properties and wear process obtained through laboratory tests. The study of these variables, using principal component analysis, discriminant analysis and ANOVA, has divided the quality of 70 samples into three main groups. A Sediment Quality Classification Index (SQCI) is proposed, which categorizes the quality of the material into poor, regular or good, providing the coastal engineer with a simple tool to ensure more sustainable beach nourishments.

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Huang, Yu-Qi, Jing-Hua Lin, Ray-Yeng Yang, Yang-Yih Chen, and Jia-Lin Julie Chen. "BEACH RESPONSE TO EXPOSED RIVERINE SEDIMENT AND BEACH NOURISHMENT." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 92. http://dx.doi.org/10.9753/icce.v36.sediment.92.

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Studying the process of riverine sediment at mouths and continental shelves is a critical subject for many engineering applications, such as dredging, navigation, dispersal and remobilization of contaminants. Sediment deposits also determine seabed properties, coastal geomorphology, and the health of coastal habitat/ecology. During extreme conditions, episodic river discharge triggered by large rainfall due to tropical cyclones may contribute significant amount of riverine sediment into the ocean. In the past decade, evidence of severe seabed erosion (up to 1m/year) along the sandy coast of Yunlin County has raised concerns regarding the sustainability of coastal structures. The exposed riverine sediment from the Jhuoshuei River is considered as one of major sources for sediment supply in this region. Bottle samples collected from bridge station in the Jhuoshuei River during the passage of tropical cyclones suggest sediment concentration can exceed 40 g/l for the major duration of the storm (Milliman et al. 2007). To mitigate the damage caused by shoreline retreat, 600,000 cubic meters per month of sand has been placed in two specific locations near the offshore industry park. The overarching goal of this study is to clarify the contribution of exposed riverine sediment and beach nourishment to enhance our understanding on the observed sediment transport and morphological evolution.

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Bitan, Menashe, Ehud Galili, Ehud Spanier, and Dov Zviely. "Beach Nourishment Alternatives for Mitigating Erosion of Ancient Coastal Sites on the Mediterranean Coast of Israel." Journal of Marine Science and Engineering 8, no. 7 (July 12, 2020): 509. http://dx.doi.org/10.3390/jmse8070509.

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Since 2011, beach nourishment has become the preferred solution for mitigating coastal erosion along the Mediterranean coast of Israel, as it is considered “soft” and environmentally friendly. However, using fine sand for nourishment in Israel without supporting measures is problematic due to the high wave energy and strong longshore currents in the littoral zone that tend to drift the sand away. This would require ongoing, multiyear, costly, and never-ending maintenance. In the present study, we analyzed sand and pebble alternatives for nourishment of the eroded beach in front of Tel Ashkelon, an important coastal archaeological site in southern Israel that suffers from severe erosion. Based on Pranzini et al. (2018), we analyzed the alternatives, evaluated their cost and efficiency, and assessed their potential environmental impacts. The study concluded that for protecting the southern part of Tel Ashkelon beach, pebble nourishment is the optimal solution, mainly regarding durability and cost. Using this material for nourishment will better absorb the storm wave impact and protect the foot of the archaeological Tel from erosion, and require lower maintenance cost than using finer sand nourishment.

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Lattanzi, L., M. Targusi, and L. Nicoletti. "Amphipod assemblages before and after beach nourishment in the central Adriatic Sea (Italy)." Crustaceana 86, no. 7-8 (2013): 853–70. http://dx.doi.org/10.1163/15685403-00003214.

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This study analyses the amphipod assemblages found in seven sites situated along the coasts of the Marche Region (central Adriatic Sea, Italy), before and after beach nourishment activities. The aim of this paper was to evaluate the changes in the structure and species composition of amphipod assemblages after nourishment. Amphipod samples were collected at each site at 2 m and 5 m depths during two different periods: May-June 2008 (before) and June-July 2010 (after). Granulometric analyses were also carried out at the same depths. Nourishment was performed in two periods: May-November 2009 (in all sites except Civitanova Marche) and February 2010 (only in Civitanova Marche). The amphipod assemblages collected before and after beach nourishment at the two depths differed in terms of species composition and abundance, while no significant differences were observed between the control stations and the impacted stations (affected by beach nourishment). The differences observed can probably be ascribed to the changes in the abiotic and biotic factors caused by the nourishment activities in the seven sites.

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Moreno, Luis J., and Juan J. Muñoz-Perez. "Beach Nourishment: A 21st Century Review." Journal of Marine Science and Engineering 9, no. 5 (May 5, 2021): 499. http://dx.doi.org/10.3390/jmse9050499.

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Long-term erosion is experienced by most of the coastlines worldwide, and it is usually attributed not only to sea level rise but also to the retention of sand in dams, the occupation of dry beaches by urbanized areas, the disturbance of the natural patterns of longshore drift, the mining of sand as building material for construction, and so on [...]

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Silveira, Tanya M., Nicholas C. Kraus, Norbert P. Psuty, and Francisco Andrade. "Beach Nourishment on Tróia Peninsula, Portugal." Journal of Coastal Research 59 (March 2011): 173–80. http://dx.doi.org/10.2112/si59-018.1.

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Pupienis, Donatas, Darius Jarmalavičius, Gintautas Žilinskas, and Julija Fedorovič. "Beach nourishment experiment in Palanga, Lithuania." Journal of Coastal Research 70 (April 28, 2014): 490–95. http://dx.doi.org/10.2112/si70-083.1.

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41

Dean, Robert G. "REALISTIC ECONOMIC BENEFITS FROM BEACH NOURISHMENT." Coastal Engineering Proceedings 1, no. 21 (January 29, 1988): 116. http://dx.doi.org/10.9753/icce.v21.116.

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A method is presented and Illustrated with examples to establish appropriate storm damage reduction and recreational benefits from beach nourishment projects. Unlike previous methods, benefits to project adjacent areas are recognized due to sand transport out of the project area and deposition on adjacent beaches. Assuming homogeniety along the shoreline, the character of storm damage reduction and recreational benefit relationships are such that sand transported from a project area and deposited on adjacent beaches always results in an increase rather than a reduction in benefits. A central element in calculating storm damage reduction benefits is the establishment of a proportional damage curve for upland structures as a function of beach width and storm return period. To illustrate the method, limiting cases are presented in which (A) all sediment remains within the area placed, and (B) all sediment spreads out immediately over a long segment of shoreline. Using Monte Carlo simulation to represent the random character of the storms, the method is applied to 15 realistic cases with varying project lengths, representative wave heights, added beach widths and interest rates. The present worth storm damage reduction and recreational benefits are calculated to demonstrate the effects of the various parameters. It is found that for short project lengths and relatively large wave heights, the benefits from project adjacent areas exceed those in the project area where the sand is placed. Although no littoral control structures, such as jetties are included in the present application, the method could be extended readily to include their effects.

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42

Charlier, Roger H., and Christian P. De Meyer. "Beach nourishment as efficient coastal protection." Environmental Management and Health 6, no. 5 (December 1995): 26–34. http://dx.doi.org/10.1108/09566169510096511.

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Work, Paul A., and W. Erick Rogers. "Wave transformation for beach nourishment projects." Coastal Engineering 32, no. 1 (October 1997): 1–18. http://dx.doi.org/10.1016/s0378-3839(97)00004-5.

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44

Elko, Nicole, Tiffany Roberts Briggs, Lindino Benedet, Quin Robertson, Gordon Thomson, Bret M. Webb, and Kimberly Garvey. "A century of U.S. beach nourishment." Ocean & Coastal Management 199 (January 2021): 105406. http://dx.doi.org/10.1016/j.ocecoaman.2020.105406.

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Dean, Robert G., and Chul‐Hee Yoo. "Beach Nourishment in Presence of Seawall." Journal of Waterway, Port, Coastal, and Ocean Engineering 120, no. 3 (May 1994): 302–16. http://dx.doi.org/10.1061/(asce)0733-950x(1994)120:3(302).

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Work, Paul A., and W. Erick Rogers. "Laboratory Study of Beach Nourishment Behavior." Journal of Waterway, Port, Coastal, and Ocean Engineering 124, no. 5 (September 1998): 229–37. http://dx.doi.org/10.1061/(asce)0733-950x(1998)124:5(229).

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Creed, P.E., Christopher G., Kevin R. Bodge, P.E., and Carrie L. Suter. "Construction Slopes for Beach Nourishment Projects." Journal of Waterway, Port, Coastal, and Ocean Engineering 126, no. 1 (January 2000): 57–62. http://dx.doi.org/10.1061/(asce)0733-950x(2000)126:1(57).

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48

Swart, D. H. "Beach nourishment and particle size effects." Coastal Engineering 16, no. 1 (January 1991): 61–81. http://dx.doi.org/10.1016/0378-3839(91)90053-j.

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Townend, I. H., and C. A. Fleming. "Beach nourishment and socio-economic aspects." Coastal Engineering 16, no. 1 (January 1991): 115–27. http://dx.doi.org/10.1016/0378-3839(91)90055-l.

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SHIMIZU, Toshihiro, Natsuko SENDA, Rina SANEI, Akiyoshi KATANO, and Syusei OGAWA. "MAINTENANCE STANDARD OF THE BEACH NOURISHMENT." Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 78, no. 2 (2022): I_553—I_558. http://dx.doi.org/10.2208/kaigan.78.2_i_553.

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Journal articles on the topic 'Beach nourishment'

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