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Artículos de revistas sobre el tema "Dune"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

van Puijenbroek, Marinka E. B., Corjan Nolet, Alma V. de Groot, et al. "Exploring the contributions of vegetation and dune size to early dune development using unmanned aerial vehicle (UAV) imaging." Biogeosciences 14, no. 23 (2017): 5533–49. http://dx.doi.org/10.5194/bg-14-5533-2017.

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Abstract. Dune development along highly dynamic land–sea boundaries is the result of interaction between vegetation and dune size with sedimentation and erosion processes. Disentangling the contribution of vegetation characteristics from that of dune size would improve predictions of nebkha dune development under a changing climate, but has proven difficult due to the scarcity of spatially continuous monitoring data. This study explored the contributions of vegetation and dune size to dune development for locations differing in shelter from the sea. We monitored a natural nebkha dune field of

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2

Itzkin, Michael, Laura J. Moore, Peter Ruggiero, Sally D. Hacker, and Reuben G. Biel. "The relative influence of dune aspect ratio and beach width on dune erosion as a function of storm duration and surge level." Earth Surface Dynamics 9, no. 5 (2021): 1223–37. http://dx.doi.org/10.5194/esurf-9-1223-2021.

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Abstract. Dune height is an important predictor of impact during a storm event given that taller dunes have a lower likelihood of being overtopped than shorter dunes. However, the temporal dominance of the wave collision regime, wherein volume loss (erosion) from the dune occurs through dune retreat without overtopping, suggests that dune width must also be considered when evaluating the vulnerability of dunes to erosion. We use XBeach, a numerical model that simulates hydrodynamic processes, sediment transport, and morphologic change, to analyze storm-induced dune erosion as a function of dun

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3

LEE, JAE HWAN, A. O. SOUSA, E. J. R. PARTELI, and H. J. HERRMANN. "MODELLING FORMATION AND EVOLUTION OF TRANSVERSE DUNE FIELDS." International Journal of Modern Physics C 16, no. 12 (2005): 1879–92. http://dx.doi.org/10.1142/s0129183105008400.

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We model formation and evolution of transverse dune fields. In the model, only the cross section of the dune is simulated. The only physical variable of relevance is the dune height, from which the dune width and velocity are determined, as well as phenomenological rules for interaction between two dunes of different heights. We find that dune fields with no sand on the ground between dunes are unstable, i.e., small dunes leave the higher ones behind. We then introduce a saturation length to simulate transverse dunes on a sand bed and show that this leads to stable dune fields with regular spa

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4

Almutlaq, Fahad, and Kevin Mulligan. "Using Texture Statistics to Identify and Map Different Dune Types within the Rub’ al Khali." Remote Sensing 15, no. 19 (2023): 4653. http://dx.doi.org/10.3390/rs15194653.

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Understanding the movement, direction, and shape of sand dunes can contribute to reducing their impact on infrastructure and the environment. The Rub’ al Khali desert has a distribution of dune types. This study aims to identify and map the different types of dunes within the Rub’ al Khali using a texture analysis method based on a digital elevation model (DEM). Statistical texture analysis methods (variance, skewness, and kurtosis) show three different textures of sand dune shapes, according to the geography of the dunes, using data contained in global DEMs. The analysis presented in this stu

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5

Durán, O., V. Schwämmle, P. G. Lind, and H. J. Herrmann. "Size distribution and structure of Barchan dune fields." Nonlinear Processes in Geophysics 18, no. 4 (2011): 455–67. http://dx.doi.org/10.5194/npg-18-455-2011.

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Abstract. Barchans are isolated mobile dunes often organized in large dune fields. Dune fields seem to present a characteristic dune size and spacing, which suggests a cooperative behavior based on dune interaction. In Duran et al. (2009), we propose that the redistribution of sand by collisions between dunes is a key element for the stability and size selection of barchan dune fields. This approach was based on a mean-field model ignoring the spatial distribution of dune fields. Here, we present a simplified dune field model that includes the spatial evolution of individual dunes as well as t

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6

Hovenga, Paige, Peter Ruggiero, Nick Cohn, et al. "POST-STORM DUNE RECOVERY IN CAPE LOOKOUT NATIONAL SEASHORE, NC." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 40. http://dx.doi.org/10.9753/icce.v36.sediment.40.

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Coastal dunes are often the first and primary form of defense against destructive surge and waves that accompany extreme storm events. Beach grasses are known to affect dune height, width, and stability, contributing to the duneâ€™s ability to protect the hinterland from wave and flooding hazards (Hacker et al. 2012). However, the interaction and feedbacks between dune development and properties of beach grasses (e.g., species, density) is not fully understood. In particular, our knowledge of the ecomorphodynamic processes controlling the recovery of coastal dunes following storms and the long

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7

Husemann, Paul, Frederico Romão, Márcia Lima, Susana Costas, and Carlos Coelho. "Review of the Quantification of Aeolian Sediment Transport in Coastal Areas." Journal of Marine Science and Engineering 12, no. 5 (2024): 755. http://dx.doi.org/10.3390/jmse12050755.

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Coastal dunes, formed and shaped by aeolian sediment transport, play a crucial role in ecosystem services and act as natural flood and coastal erosion defenses. This paper delves into theoretical equations and numerical models predicting sediment transport. Numerical models like cellular automata, XBeach-DUNA, the coastal dune model, and others are analyzed for their ability to simulate dune morphology, erosion processes, and vegetation impacts accurately. Evaluated are field observation and measurement techniques, such as sand traps, impact sensors, and optical sensors, for their precision in

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8

He, Nan, Yuanwei Lin, Yang Zhang, and Bin Yang. "Approximate uniformity of the size distribution in the crescent-shaped dune swarm: A downsized experimental reinvestigation." AIP Advances 12, no. 3 (2022): 035102. http://dx.doi.org/10.1063/5.0083088.

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Crescent-shaped dunes, or barchans, usually move in swarms in nature, where their sizes become closer to each other while migrating downstream collectively. A major cause of such a phenomenon is the collision among the dunes. Therefore, it is of importance to elucidate the pattern of the local dune interaction process, i.e., the double-dune collision. In this study, based on a downsized water tunnel experiment that adopts two colors of sand samples, the double-dune collision pattern is parameterized, which is investigated as a function of the initial mass ratio of the two dunes. The results de

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9

Bird, Tania Leah Fairfax, Amos Bouskila, Elli Groner, and Pua Bar Kutiel. "Can Vegetation Removal Successfully Restore Coastal Dune Biodiversity?" Applied Sciences 10, no. 7 (2020): 2310. http://dx.doi.org/10.3390/app10072310.

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Coastal dune habitats have been declining globally over the last several decades due to rapid urbanization. Within remaining dune systems, dune fixation has resulted in further losses of mobile dunes with negative impacts on their associated species. Some studies suggest vegetation removal can initially promote habitat heterogeneity, and increase availability of suitable habitats for psammophile, xeric and endemic mobile dune species, but longer-term responses are generally unknown. We investigated the temporal trends of four taxonomic groups to determine the effect of vegetation removal on du

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10

Gralher, Christine, Nobuhisa Kobayashi, and Kideok Do. "WAVE OVERWASH OF VEGETATED DUNES." Coastal Engineering Proceedings 1, no. 33 (2012): 34. http://dx.doi.org/10.9753/icce.v33.sediment.34.

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Sand dunes play a significant role during coastal storms by absorbing the impacts of storm surge and high waves. Therefore, rapid profile changes and destruction of sand dunes, which may be caused by wave-induced overwash, lead to an increased flood risk landward of dunes. The effects of vegetation on dune erosion and overwash during storm events, however, have never been studied. This study is based on a laboratory experiment investigating the effects of woody plants on dune erosion and overwash of high and low dunes. During the five tests conducted foredune scarping was observed for the thre

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11

Molina, Rosa, Giorgio Manno, Carlo Lo Re, and Giorgio Anfuso. "Dune Systems’ Characterization and Evolution in the Andalusia Mediterranean Coast (Spain)." Water 12, no. 8 (2020): 2094. http://dx.doi.org/10.3390/w12082094.

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This paper deals with the characterization and evolution of dune systems along the Mediterranean coast of Andalusia, in the South of Spain, a first step to assess their relevant value in coastal flood protection and in the determination of sound management strategies to protect such valuable ecological systems. Different dune types were mapped as well as dune toe position and fragmentation, which favors dune sensitivity to storms’ impacts, and human occupation and evolution from 1977 to 2001 and from 2001 to 2016. Within a GIS (Geographic Information System) project, 53 dune systems were mappe

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12

Zhi, Dejuan, Wenbin Nan, Xiaoxia Ding, Qinjian Xie, and Hongyu Li. "Soil nematode community succession in stabilised sand dunes in the Tengger Desert, China." Soil Research 47, no. 5 (2009): 508. http://dx.doi.org/10.1071/sr08196.

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In order to examine how nematodes respond to sand dune succession after stabilisation and reclamation techniques, nematode communities were investigated in sand dunes stabilised for 0, 16, 26, 43, and 51 years in the Tengger Desert, China. Our results revealed that the abundance of nematodes; the proportion of fungivores, omnivores, and predators; maturity index (MI); Shannon index; evenness; and structure index (SI) were affected significantly by the age of stabilised sand dunes, and were correlated with soil physical and chemical properties to different degrees. There were differences in nem

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13

Bar Kutiel, Pua, and Michael Dorman. "The Importance of Annual Plants and Multi-Scalar Analysis for Understanding Coastal Dune Stabilization Process in the Mediterranean." Applied Sciences 11, no. 6 (2021): 2821. http://dx.doi.org/10.3390/app11062821.

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Since ecological phenomena and patterns vary with scale, scalar analysis is a developing practice in ecology. Scalar analysis is most valuable in heterogeneous environments, since habitat heterogeneity is a key factor in determining biodiversity. One such case can be seen in the changes in annual vegetation in coastal sand dune systems. Most studies in these environments are carried out at the dune scale, comparing dunes at different stabilization states. However, a broader understanding of dune stabilization processes requires analyses at the finer scales of dune slope aspects (directions of

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14

Vérité, Jean, Clément Narteau, Olivier Rozier, Jeanne Alkalla, Laurie Barrier, and Sylvain Courrech du Pont. "Equilibrium distance from long-range dune interactions." Earth Surface Dynamics 13, no. 1 (2025): 23–39. https://doi.org/10.5194/esurf-13-23-2025.

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Abstract. Flow perturbations induced by dune topography affect sediment transport locally but can also be felt over long distances, altering the dynamics of isolated neighbouring dunes downstream. In order to work under optimal conditions that eliminate transverse flow components, collisions, and mass exchange between dunes, we study here these long-range interactions using a 2D numerical model where two equal-sized dunes lying on a non-erodible bed are exposed to a symmetric reversing flow. Depending on the initial spacing, dunes either attract or repel each other to eventually converge towar

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15

Zomer, Judith Y., Bart Vermeulen, and Antonius J. F. Hoitink. "Coexistence of two dune scales in a lowland river." Earth Surface Dynamics 11, no. 6 (2023): 1283–98. http://dx.doi.org/10.5194/esurf-11-1283-2023.

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Abstract. A secondary scale of bedforms, superimposed on larger, primary dunes, has been observed in fluvial systems worldwide. This notwithstanding, very little is known about the morphological behavior and characteristics of this secondary scale. This study aims to better characterize and understand how two dune scales coexist in fluvial systems and how both scales adapt over time and space, considering their interdependence. The study is based on analysis of a large biweekly multibeam echo sounding dataset from the river Waal, a lowland sand-bedded river. Results reveal that the secondary d

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16

Lee, Eunju, Hai Van Dang, Sungwon Shin, Jeseon Yoo, and Hyoungsu Park. "PREDICTION OF WAVE RUN-UP AFFECTED BY DUNE SCARP: A LARGE-SCALE TWO- DIMENSIONAL MOVABLE BED EXPERIMENT." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 18. https://doi.org/10.9753/icce.v38.currents.18.

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Korean beaches have suffered erosion due to coastal development. Recently, the South Korean government has initiated efforts to restore the dune system for a beach on the west coast of Korea. Coastal sand dunes serve as natural barriers against extreme waves caused by climate change and rising sea levels. To design effective artificial sand dunes, understanding the erosion and restoration mechanisms of coastal dunes is crucial. Hence, the COastal sand Dune Experiment in Korea (CODEK), a large-scale two-dimensional movable bed experiment, was conducted to investigate these mechanisms. This stud

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17

Prodanov, Bogdan, Lyubomir Dimitrov, Iliyan Kotsev, Radoslava Bekova, and Todor Lambev. "Spatial distribution of sand dunes along the Bulgarian Black Sea Coast: inventory, UAS mapping and new discoveries." Nature Conservation 54 (December 5, 2023): 81–120. http://dx.doi.org/10.3897/natureconservation.54.105507.

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Coastal sand dunes are amongst the world’s most sensitive and dynamic landforms. Unfortunately, during the last thirty years, heavy anthropogenic alterations have been observed, encompassing the greater part of the Bulgarian Black Sea coast (BBSC), which has changed the land-sea interactions significantly. As a consequence, the depositional coast has shrunk to 131 km or 25% of the aggregate Bulgarian Black Sea shoreline length. Although our research reveals that 86% of BBSC dunes are included in the Natura 2000 network of protected sites established under the Habitats Directive (Council Direct

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18

Prodanov, Bogdan, Lyubomir Dimitrov, Iliyan Kotsev, Radoslava Bekova, and Todor Lambev. "Spatial distribution of sand dunes along the Bulgarian Black Sea Coast: inventory, UAS mapping and new discoveries." Nature Conservation 54 (December 5, 2023): 81–120. https://doi.org/10.3897/natureconservation.54.105507.

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Coastal sand dunes are amongst the world's most sensitive and dynamic landforms. Unfortunately, during the last thirty years, heavy anthropogenic alterations have been observed, encompassing the greater part of the Bulgarian Black Sea coast (BBSC), which has changed the land-sea interactions significantly. As a consequence, the depositional coast has shrunk to 131 km or 25% of the aggregate Bulgarian Black Sea shoreline length. Although our research reveals that 86% of BBSC dunes are included in the Natura 2000 network of protected sites established under the Habitats Directive (Council Direct

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19

Els, A., S. Merlo, and J. Knight. "Comparison of two Satellite Imaging Platforms for Evaluating Sand Dune Migration in the Ubari Sand Sea (Libyan Fazzan)." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-7/W3 (April 30, 2015): 1375–80. http://dx.doi.org/10.5194/isprsarchives-xl-7-w3-1375-2015.

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Sand dunes can change location, form or dimensions depending on wind direction and strength. Sand dune movements can be effectively monitored through the comparison of multi-temporal satellite images. However, not all remote sensing platforms are suitable to study sand dunes. This study compares coarse (Landsat) and fine (Worldview) resolution platforms, specifically focussing on sand dunes within the Ubari Sand Sea (Libya). Sand dune features (crest line, dune ridge basal outlines) were extracted from Landsat and Worldview 2 imagery in order to construct geomorphic maps. These geomorphic maps

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20

Abdikerem, Xamxinur, Akbar Eziz, Abudoukelimu Abudoureheman, and Mamtimin Gheni. "Numerical Simulation of Sand Dune Formation with Periodical Uniform Stream Field." Advanced Materials Research 33-37 (March 2008): 1069–74. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.1069.

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In this study, to conduct numerical simulation of sand dune forming processes, the mathematical model for sand dune dynamics are studied. Due to sand dune dynamics and the stream field, which includes wind flow over a dune field, analyses process is complex the uniform sand field and stream fields are consider for the numerical simulation process. Then the dune forming process simulated by considering the dunes induced factor and interactions phenomenon.

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21

Mahmoud, Ahmed Mutasim Abdalla, Ekbal Hussain, Alessandro Novellino, Panos Psimoulis, and Stuart Marsh. "Monitoring the Dynamics of Formby Sand Dunes Using Airborne LiDAR DTMs." Remote Sensing 13, no. 22 (2021): 4665. http://dx.doi.org/10.3390/rs13224665.

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Coastal dunes play an important role in coastal erosion risk management, where they act as a dynamic natural sea defence line. Formby coast is part of the Sefton coast in the Northwest of England and is one of the largest and most rapidly evolving sand dune systems in the UK. Such dune systems require continuous comprehensive monitoring activity to understand their dynamics. In this research, we investigate the use of airborne LiDAR digital terrain model DTMs for monitoring the dynamics of the sand dunes at Formby between 1999 and 2020. We found that the rate of elevation change for the beach

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22

Ellis, Jean T., and Mayra A. Román-Rivera. "Assessing Natural and Mechanical Dune Performance in a Post-Hurricane Environment." Journal of Marine Science and Engineering 7, no. 5 (2019): 126. http://dx.doi.org/10.3390/jmse7050126.

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The purpose of this study is to document the geomorphic evolution of a mechanical dune over approximately one year following its installation and compare it to the recovery of a natural dune following the impact of Hurricane Matthew (2016). During the study period, the dunes’ integrity was tested by wave and wind events, including king tides, and a second hurricane (Irma, 2017), at the end of the study period. Prior to the impact of the second hurricane, the volumetric increase of the mechanical and natural dune was 32% and 75%, respectively, suggesting that scraping alone is not the optimal p

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23

Villard, P. V., and M. Church. "Dunes and associated sand transport in a tidally influenced sand-bed channel: Fraser River, British Columbia." Canadian Journal of Earth Sciences 40, no. 1 (2003): 115–30. http://dx.doi.org/10.1139/e02-102.

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Dunes form annually on the sand bed of the tidally influenced South Arm of Fraser River, British Columbia. Bathymetric surveys along the center of the main channel throughout a snow-melt freshet provided measurements of dune geometry and migration. Dune length, height, and steepness all increase with river discharge. However, lag between the highest flow conditions and development of the largest, steepest dunes reflects the influence of antecedent flow conditions on dune geometry. Population averages of dune height and steepness ratio change more rapidly than dune length, whilst coefficients o

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24

Larson. "Topographic Effects on Titan’s Dune-forming Winds." Atmosphere 10, no. 10 (2019): 600. http://dx.doi.org/10.3390/atmos10100600.

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The Cassini mission made an unexpected discovery when it found evidence of linear dune fields on Titan’s surface. The orientation of the dunes and their interaction with topography allow scientists to estimate the dominant wind direction on the surface of Titan. There is some consensus in the community that the dune-forming winds must be net westerly, however, there is an active debate about the dune-forming wind regime. This debate has been guided by several studies of Earth dune fields considered analogous to the Titan dunes including those in Namibia, the Sahara, the Serengeti, and China. C

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25

Darke, Ian B., Ian J. Walker, and Patrick A. Hesp. "Beach-dune sediment budgets and dune morphodynamics following coastal dune restoration, Wickaninnish Dunes, Canada." Earth Surface Processes and Landforms 41, no. 10 (2016): 1370–85. http://dx.doi.org/10.1002/esp.3910.

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26

Delgado Blasco, José Manuel, Marco Chini, Gert Verstraeten, and Ramon F. Hanssen. "Sand Dune Dynamics Exploiting a Fully Automatic Method Using Satellite SAR Data." Remote Sensing 12, no. 23 (2020): 3993. http://dx.doi.org/10.3390/rs12233993.

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This work presents an automatic procedure to quantify dune dynamics on isolated barchan dunes exploiting Synthetic Aperture RADAR satellite data. We use C-band datasets, allowing the multi-temporal analysis of dune dynamics in two study areas, one located between the Western Sahara and Mauritania and the second one located in the South Rayan dune field in Egypt. Our method uses an adaptive parametric thresholding algorithm and common geospatial operations. A quantitative dune dynamics analysis is also performed. We have measured dune migration rates of 2–6 m/year in the NNW-SSE direction and 1

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27

Gao, Jinjuan, David M. Kennedy, and Teresa M. Konlechner. "Coastal dune mobility over the past century: A global review." Progress in Physical Geography: Earth and Environment 44, no. 6 (2020): 814–36. http://dx.doi.org/10.1177/0309133320919612.

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The mobility of coastal dunes is characterised by bio-geomorphological responses related to change in boundary conditions, particularly sediment supply, wind and vegetation cover, as well as human activities. There remains uncertainty regarding the relative importance of these drivers on dune mobility at a global scale. In this study, trends and dominant drivers of coastal dune mobility are synthesised through the literature review focusing on shifts in dune mobility over the last century (1870–2018). In total, 176 individual dunes, with 55 dunes from the Europe-Mediterranean area, 23 from Afr

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28

Munyikwa, Kennedy. "The role of dune morphogenetic history in the interpretation of linear dune luminescence chronologies: a review of linear dune dynamics." Progress in Physical Geography: Earth and Environment 29, no. 3 (2005): 317–36. http://dx.doi.org/10.1191/0309133305pp451ra.

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Contemporary knowledge on aeolian dune dynamics is reviewed to enable an appraisal of evolutionary mechanisms involved in linear dune stratigraphic sequence development. The degrees of depositional record retention in the dune structures are evaluated and the corollary applied to methods used in the interpretation of luminescence dating chronologies acquired from such sedimentary accumulations. It is demonstrated that morphogenetic aspects of dune development are an imperative element to invoke when carrying out palaeoenvironmental reconstruction using luminescence dating ages acquired from li

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29

Lubke, Roy A. "Current State of Ammophila arenaria (Marram Grass) Distribution in the Eastern Cape, South Africa, and the Possible Effect of the Grass on the Dune System Dynamics." Plants 11, no. 17 (2022): 2260. http://dx.doi.org/10.3390/plants11172260.

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The principal aim of this paper is to show that marram grass is not an invasive alien in South Africa although it affects the dune dynamics as a useful pioneer species in the dune successional process. The historical perspective of marram introduction as a dune stabiliser and the studies and conclusions reached from our European Union funded project, INVASS, in the 1990s and early 2000s is presented. Although these studies showed that marram was non-invasive, this was not clearly carried through to the authorities, and the use of the grass as a dune stabiliser was limited without a special per

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30

Zhao, Feifei, Benjamin T. Cardenas, and Wonsuck Kim. "Controls of aeolian dune height on cross-strata architecture: White Sands Dune Field, New Mexico, U.S.A." Journal of Sedimentary Research 91, no. 5 (2021): 495–506. http://dx.doi.org/10.2110/jsr.2020.138.

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ABSTRACT The stratal types composing aeolian dunes preserve a record of the transport and sorting of grains and are categorized into: 1) grainflow strata, 2) grainfall laminae, and 3) wind-ripple laminae. The arrangement of these deposits in the cross beds of a formative dune is largely unexplored. Here, field results from White Sands Dune Field, New Mexico, USA, are used to test the hypothesis that dune height controls the arrangement, abundance, and geometry of cross-stratification types. Grainflow thicknesses and deposit widths were measured on wind-scoured stoss-side exposures of seven cre

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31

Shawler, Justin, Brian Harris, Hallie Fischmann, et al. "COMPARING BELOWGROUND CHARACTERISTICS OF NATURAL AND RESTORED COASTAL DUNES ALONG THE NORTHEAST FLORIDA (USA) COAST." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 40. https://doi.org/10.9753/icce.v38.management.40.

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Highly developed coasts often comprise nature-based constructed and restored dune systems to protect critical infrastructure and support ecosystem benefits (Nordstrom et al., 2000). Yet, we often fail to capture how the below- ground properties (i.e., biomass/roots, geology, and geotechnical properties) of these reconstructed dunes vary from their natural counterparts. This is critical to understand because differences in belowground properties can result in contrasting morphodynamic behaviors and responses (i.e., erosion rates, dune recovery trajectories) (Bryant et al., 2019). The objective

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32

Halsey, L. A., N. R. Catto, and N. W. Rutter. "Sedimentology and development of parabolic dunes, Grande Prairie dune field, Alberta." Canadian Journal of Earth Sciences 27, no. 12 (1990): 1762–72. http://dx.doi.org/10.1139/e90-182.

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The Grande Prairie dune field in northwest central Alberta is composed of parabolic and dome dunes, presently inactive but which had developed under westerly winds. Two parabolic dune types are recognized on the basis of arm length, nose width, and dune height. Variations in parabolic dune morphology are attributed to spatial and (or) temporal differences in sediment budget as elucidated from sedimentary sequences preserved in the dunes.Seven facies and four subfacies are distinguished from sedimentary sequences examined in nine dune sections. Lee-side deposits of parabolic dunes are typically

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33

Zheng, Shuwei, Xinmeng Yuan, Suxian Yang, et al. "Seasonal Variation of Catenary-Bead Dunes in the Yangtze River Estuary: Causes and Implications." Journal of Marine Science and Engineering 10, no. 7 (2022): 886. http://dx.doi.org/10.3390/jmse10070886.

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Low-angle lee-side slopes of dunes are commonly developed on the world’s riverbeds, and dune migration associated with sediment transport exert a major influence on riverine processes. However, the catenary-bead dune has been identified in the Yangtze River (YR) Estuary, featuring a higher lee-side angle. To date, the morphological variation and formation reasons of catenary-bead dunes in the YR Estuary remain uncharacterized. In this study, we used a multibeam echo system (MBES) to investigate the bedforms of the YR estuary during 2014–2015, as well as to discuss the seasonal variation of cat

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34

Macdonald, S. Ellen, C. C. Chinnappa, David M. Reid, and Brett G. Purdy. "Population differentiation of the Stellaria longipes complex within Saskatchewan's Athabasca sand dunes." Canadian Journal of Botany 65, no. 8 (1987): 1726–32. http://dx.doi.org/10.1139/b87-235.

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Stellaria arenicola, a recent derivative within the S. longipes complex, is an endemic of the Athabasca sand dunes. Analysis of 11 morphological characters on 40 genets showed that both the endemic and parental (S. longipes) species are present within the Thomson Bay dune field and that the two forms are distinct. Individuals of S. arenicola were distinguished by only a few characters, typically, large yellow capsules with reflexed teeth and yellowish leaf and stem pigmentation. The endemic also exhibited a higher sexual reproductive output. Many characteristics of vegetative morphology showed

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Łabuz, Tomasz Arkadiusz, Ralf Grunewald, Valentina Bobykina, et al. "Coastal Dunes of the Baltic Sea Shores: A Review." Quaestiones Geographicae 37, no. 1 (2018): 47–71. http://dx.doi.org/10.2478/quageo-2018-0005.

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Abstract The article summarises results of studies conducted along the Baltic Sea sandy coasts by scientists involved in coastal dune research, and presents an attempt to describe the types and distribution of dune coasts. The Baltic Sea coasts feature lower and higher foredunes. The lowland behind the coastal dune belt is covered by wandering or stabilised inland dunes – transgressive forms, mainly parabolic or barchans. The source of sediment for dune development includes fluvioglacial sands from eroded coasts, river-discharged sand, and older eroded dunes. Due to the ongoing erosion and coa

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Alvarez, Carlos A., and Erick Franklin. "Experimental study on the formation of subaqueous barchan dunes in closed conduits." EPJ Web of Conferences 180 (2018): 02002. http://dx.doi.org/10.1051/epjconf/201818002002.

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The present paper reports the formation of subaqueous barchan dunes by analyzing the temporal evolution of their main geometrical characteristics (width W, length L and horn lengths Lh). After certain time, the dunes reach an equilibrium state and it is possible to study the relation between W versus L, and the dependence of the dune velocity on L. The barchan dunes were formed from spherical glass and zirconium beads. An initial conical heap of beads was placed on the bottom wall of a rectangular channel and it was entrained by a water turbulent flow. The evolution of the dunes was filmed wit

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Charbonneau, Bianca, and Brenda Casper. "WIND TUNNEL TESTS OF HOW COASTAL PLANTS FEEDBACK ON DUNE SHAPE." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 71. http://dx.doi.org/10.9753/icce.v36.sediment.71.

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Theoretical evolution of a coastal dune system starts at the individual plant level with the formation of bedforms, nebkha and shadow dunes, around plants. Over time, these initial bedforms can evolve into a fully developed foredune and eventually a complex dune system capable of buffering upland coastal areas against high tides and storms. Recent studies suggest that dunebuilding plant species may differ in their sand trapping efficiency and they may support different topographies, building dunes morphologically similar to their own stature â€“ i.e. a taller steeper plant would build a taller

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38

Mehrtens, Björn, Oliver Lojek, Lukas Ahrenbeck, et al. "AN EXPERIMENTAL BENCHMARKING STUDY ON HYBRID COASTAL DUNE REINFORCEMENT VARIANTS." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 42. https://doi.org/10.9753/icce.v38.structures.42.

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Besides the natural protection of coastal dunes against storm surges (Mehrtens et al., 2023), blue-grey-hybrid dune structures play a key role in strengthening the protective mechanism of dunes against erosion, while imitating their natural landform appearance and function (Nordstrom 2019). Although artificial dunes with hybrid core enhancements are widespreadly implemented along many coasts worldwide (Winters et al., 2020), limited work addressed the effectiveness and potential enhancement of specific dune reinforcement strategies in a comparative fashion. An exception to this statement is th

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39

Porcile, Gaetano, Dominique Mouazé, Pierre Weill, Anne-Claire Bennis, and Aurélien Gangloff. "IMPACT OF SAND DUNE MORPHOLOGY ON MACRO-TIDAL CURRENT DYNAMICS: INSIGHTS FROM PIV MEASUREMENTS." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 85. https://doi.org/10.9753/icce.v38.sediment.85.

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Here we present an experimental campaign delving into the complex interplay between sand dune morphology and tidal current dynamics. Employing particle image velocimetry (PIV) measurements, we conducted diverse series of laboratory flume experiments to scrutinize the hydrodynamic influence of dunes on steady currents, both aligned and opposed to the dune asymmetry. Our experiments sought to replicate the hydrodynamics occurring over the tidal dune field of the Goulet de Brest, located in Brittany, France. The Goulet hosts well-formed and highly dynamic dunes shaped by intense tidal currents. N

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40

Naqshband, Suleyman, Bas Wullems, Timo de Ruijsscher, and Ton Hoitink. "Experimental investigation of low-angle dune morphodynamics." E3S Web of Conferences 40 (2018): 02056. http://dx.doi.org/10.1051/e3sconf/20184002056.

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Dunes commonly dominate the bed of sandy rivers and they are of central importance in predicting flow resistance and water levels. In the present study, we show that by using light-weight polystyrene particles as substrate in a laboratory setting, promising morphodynamic similarity is obtained between dunes in shallow flow (flume) and deep flow (field) conditions. In particular, results from our flume experiments show that dune lee-side angles, which are crucial in turbulence production and energy dissipation, better approximate dune lee-side angles observed in natural channels. Furthermore, d

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Domínguez Acosta, Miguel, Richard P. Langford, and Thomas E. Gill. "Morphometry of the Samalayuca dunes, northern Chihuahua, Mexico." Boletín de la Sociedad Geológica Mexicana 75, no. 3 (2023): A240823. http://dx.doi.org/10.18268/bsgm2023v75n3a240823.

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The Samalayuca Dunes (SMD) (Médanos de Samalayuca), Chihuahua, México, are one of México’s largest and least studied dune fields, now managed as a Protected Area for their ecological characteristics. We present a morphometric characterization of the dune field based on remote sensing and field studies, to advance understanding of its physical environment. SMD’s generally-fine sands originate from shoreline deposits of Paleolake Palomas, transported eastward (downwind) along an aeolian corridor, accumulating primarily as echo dunes upwind of the sierras of Samalayuca and Presidio. A complex win

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Jarvis, Paul A., Clement Narteau, Olivier Rozier, and Nathalie M. Vriend. "The probabilistic nature of dune collisions in 2D." Earth Surface Dynamics 11, no. 4 (2023): 803–15. http://dx.doi.org/10.5194/esurf-11-803-2023.

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Abstract. Dunes are bedforms of different size and shape, appearing throughout aeolian, subaqueous and extraterrestrial environments. Collisions between dunes drive dune field evolution, and are a direct result of interacting dunes of different heights, travelling at different speeds. We perform 2D cellular automaton simulations of collisions between dune pairs migrating in a steady flow. Modelled collisions can result in either ejection, where dunes exchange mass before separating, or downstream- or upstream-dominant coalescence (merging of dunes). For each of these three elementary types of

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Lü, Ping, Clément Narteau, Zhibao Dong, et al. "Direct validation of dune instability theory." Proceedings of the National Academy of Sciences 118, no. 17 (2021): e2024105118. http://dx.doi.org/10.1073/pnas.2024105118.

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Modern dune fields are valuable sources of information for the large-scale analysis of terrestrial and planetary environments and atmospheres, but their study relies on understanding the small-scale dynamics that constantly generate new dunes and reshape older ones. Here, we designed a landscape-scale experiment at the edge of the Gobi desert, China, to quantify the development of incipient dunes under the natural action of winds. High-resolution topographic data documenting 42 mo of bedform dynamics are examined to provide a spectral analysis of dune pattern formation. We identified two succe

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Rodrigues, Guilherme Da Silva, Ulisses Rocha de Oliveira, and Karine Bastos Leal. "Variação das dunas no Balneário Barra do Chuí, extremo sul do Brasil, entre 2005-2018." Revista Brasileira de Geografia Física 14, no. 2 (2021): 522. http://dx.doi.org/10.26848/rbgf.v14.2.p522-536.

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As dunas costeiras são feições naturais formadas a partir das praias arenosas, devido a interação do vento, areia e vegetação. No entanto, a ação humana torna-se uma variável cada vez mais relevante em sua dinâmica, ocasionando problemas ambientais. O presente trabalho tem como objetivo quantificar e caracterizar, a partir de uma série temporal de imagens orbitais no intervalo entre 2005 e 2018, a mobilidade das dunas no Balneário Barra do Chuí – RS, especificamente a variação na base das dunas frontais. O intuito é verificar processos de erosão e sedimentação na orla do balneário, bem como a

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Feyzolahpour, Mehdi, Rouholah Mohamadi, and Hasan Ghasemlu. "Analysis of movement and relationships between morphometric components of sand dunes (barchans) in the south-eastern of Iran." AUC GEOGRAPHICA 57, no. 1 (2022): 75–84. http://dx.doi.org/10.14712/23361980.2022.7.

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Morphology of barchan dunes plays a key role in the rate of movement of barchan dunes and accordingly, the areas that are in the path of barchan dunes can be identified. In this study, morphological parameters of eight barchan dunes in west Lut and movement were investigated. For this purpose, 8 parameters of windward slope length, back-to-wind slope length, right arm length, left arm length, length, width, right width and left width were measured in each barchan dune and Pearson correlation was calculated by SPSS software. In order to better understand the shape of barchan dunes, satellite im

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46

Gadal, C., C. Narteau, S. Courrech du Pont, O. Rozier, and P. Claudin. "Periodicity in fields of elongating dunes." Geology 48, no. 4 (2020): 343–47. http://dx.doi.org/10.1130/g46987.1.

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Abstract Dune fields are commonly associated with periodic patterns that are among the most recognizable landscapes on Earth and other planetary bodies. However, in zones of limited sediment supply, where periodic dunes elongate and align in the direction of the resultant sand flux, there has been no attempt to explain the emergence of such a regular pattern. Here, we show, by means of numerical simulations, that the elongation growth mechanism does not produce a pattern with a specific wavelength. Periodic elongating dunes appear to be a juxtaposition of individual structures, the arrangement

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47

Mason, Jasmine, Benjamin T. Cardenas, Mackenzie D. Day, et al. "Pattern evolution and interactions in subaqueous dune fields: North Loup River, Nebraska, U.S.A." Journal of Sedimentary Research 90, no. 12 (2020): 1734–46. http://dx.doi.org/10.2110/jsr.2020.066.

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ABSTRACT A time series of aerial images of a dune field on a migrating free bar in the North Loup River, Nebraska, is used to generate a quantified dataset that allows analyses of crestline deformation, dune interaction type and spatial density, and impact of spurs. Measurement of dune parameters show that the dune field maintained a dynamic steady-state pattern, despite high rates of deformation, common interactions, and sediment bypassing. Mapped crestlines had a mean migration rate of 8 cm/min. The mean deformation rate, quantified using a partial Procrustes analysis, was 2 cm/min, indicati

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Janssen, Matthew S., Audrey Fanning, Jon K. Miller, and Laura Lemke-Verderame. "PARAMETRIZING DUNE RESILIENCE FROM COLLISION THROUGH INUNDATION." Coastal Engineering Proceedings, no. 37 (September 1, 2023): 161. http://dx.doi.org/10.9753/icce.v37.management.161.

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Numerous studies have identified the protective benefit provided by dunes in shielding upland assets. However, dunes are susceptible to erosion. Breaches, overwash or significant overtopping of a dune are all associated with greater damages to upland infrastructure. Therefore, reliable tools are needed to efficiently assess the likelihood and magnitude of dune erosion during storm events. Existing methods rely on numerical modeling (extensive investment) or insufficiently parameterize the system. To fill this gap, a fragility model using a newly developed dune Engineering Demand Parameter (EDP

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Calafat, Antoni, Sara Vírseda, Raúl Lovera, et al. "Assessment of the Restoration of the Remolar Dune System (Viladecans, Barcelona): The Resilience of a Coastal Dune System." Journal of Marine Science and Engineering 9, no. 2 (2021): 113. http://dx.doi.org/10.3390/jmse9020113.

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The Remolar beach-dune system (700 m long and more than 100 m wide, 070N direction) borders a campground that was closed (2003), due to the Barcelona airport expansion. In order to recover and restore the dune ecosystem, a series of soft measures were performed. After 10 years, a study of the morphology, sedimentology, and vegetation of the ecosystem was carried out to evaluate the results of these measures. For this purpose, a series of topographic and ground-penetrating radar (GPR) profiles, grain-size analysis, and an analysis of plant communities found along the profiles were carried out.

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Wang, Shijun, Wenyuan Bai, Yunfei Tian, Hailong Zhang, and Hongchao Dun. "Evaluation of the Influence of Wind-Induced Dune Movement on Transmission Tower Lines." Atmosphere 16, no. 7 (2025): 779. https://doi.org/10.3390/atmos16070779.

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Thorough investigation into dune morphology is pivotal for grasping the intricacies of constructing and operating power transmission lines in desert terrains. However, there remains a notable gap in the quantitative analysis and assessment of how dune dynamics evolve under the influence of transmission infrastructure. In this study, the Real-Space Cellular Automaton Laboratory is deployed to explore how transverse dunes evolve around transmission towers under diverse wind velocities and varying dune dimensions. The results reveal that, beyond the immediate vicinity of the transmission tower, t

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