Article
Chemistry, Physical
Guoqiang Liu, Wenzhe Zhang, Liang Zhang, Jiarui Cheng
Summary: By establishing a two-phase flow model and erosion forecasting model, this study investigated the erosion mechanism of liquid-solid suspension flow on horizontal pipe walls. The results indicate that particles impacting the wall at a small angle cause cutting erosion, leading to rapid loss of wall material and uniform thinning of the pipe wall.
Article
Geosciences, Multidisciplinary
Kilian Vos, Wen Deng, Mitchell Dean Harley, Ian Lloyd Turner, Kristen Dena Marie Splinter
Summary: Sandy beaches undergo constant reshaping by waves, tides, currents, and winds. The beach face, the area between land and ocean, is crucial for coastal processes such as wave energy dissipation and sediment exchange. However, datasets of beach-face slopes remain unavailable for most coastlines worldwide. This study introduces a new dataset for the Australian coastline, derived from remote sensing, which provides beach-face slope estimates and confidence measures. The dataset offers valuable information for predicting coastal hazards in Australia.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Liting Yang, Jun'e Liu, Xiaoqian Qi, Xike Cheng, Chunyan Ma, Zhanli Wang
Summary: The study analyzed the hydrodynamic parameters and the relationships between sheet erosion modulus and hydrodynamic parameters under different polysaccharides rates to reveal the hydrodynamic mechanism of sheet erosion on loessial slopes. It was found that polysaccharides effectively reduced the hydrodynamic parameters and the growth rate of sheet erosion. Flow velocity and stream power were identified as better hydrodynamic parameters compared to shear stress and unit stream power.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Dandan Li, Xiaoyan Chen, Tingting Tao, Wenhao Tan, Liwen Ma
Summary: This study investigated sheet erosion and rill erosion along a saturated soil slope through indoor soil flume simulated rainfall experiments. The erosion masses in different erosion stages were quantified and compared. The results showed that there were relationships among rainfall intensity, slope gradient, and erosion mass, and the erosion masses in the rill erosion state were higher than those in the sheet erosion state.
Article
Engineering, Ocean
Jun Zhu, Fengyan Shi, Feng Cai, Qing Wang, Hongshuai Qi, Chao Zhan, Jianhui Liu, Gen Liu, Gang Lei
Summary: The study simulated the beach erosion processes of two neighboring beaches using a numerical model and found significant effects of berm height on beach profile changes.
APPLIED OCEAN RESEARCH
(2022)
Article
Environmental Studies
Alain Zuber, Maria-Carmen Alvarez, Edgar Mendoza, Miguel Angel Diaz-Flores, Marco Galicia-Perez, Ernesto Torres-Orozco
Summary: This study investigated the evolution of beach profile and sedimentary balance in Playa del Coco, Mexico over a one-year period. The beach profile type was determined based on the energy profile of the geomorphology, resulting in three types: low, medium, and high energy. Sediment volumes were quantified and erosion or accumulation at each study site was described. The results showed that the beach mostly had a medium-energy profile, with high-energy conditions occurring only once due to the influence of a high-category hurricane. The dominant sediment size was medium, well-classified, and there was a significant loss of sediment at the end of the study. Playa del Coco exhibited quasi-equilibrium state before the end of the annual cycle, but experienced a great loss of sedimentary material influenced by Hurricane Odile, modifying the beach's recovery state. Thus, the beach stability might be cyclic and governed by self-organization principle rather than seasonal parameters.
Article
Engineering, Marine
Laura Lemke, Jon K. Miller
Summary: Coastal erosion is influenced by storm intensity and location vulnerability factors. Peak Erosion Intensity (PEI) was found to be the most important parameter in predicting dune impacts, successfully distinguishing between storms likely to result in no impacts and those likely to cause some damage.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Marine
Yingtao Zhou, Xi Feng, Maoyuan Liu, Weiqun Wang
Summary: This study is based on an artificial beach project in Haikou Bay, proposing a new type of beach profile that can protect beach berm and width from erosion caused by large wave action. Numerical simulations were performed to predict the morphodynamical responses of the beach under storm and normal wave events. The sediment fluxes and erosion spots along and across the shoreline were discussed. Engineering and biological methods to reduce beach erosion during wave action were explored, and the design concept of this artificial beach project may inspire more projects in coastal zones.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Pau Luque, Lluis Gomez-Pujol, Francesca Ribas, Albert Falques, Marta Marcos, Alejandro Orfila
Summary: Shoreline position is an important parameter for studying beach state and its response to external forcing. This study derives a general equation for shoreline evolution using equilibrium beach profiles and evaluates the impact of sea-level rise and wave and sea-level forcing. The results show the need to consider the emerged beach area subject to marine forcing and highlight the potential variation in shoreline recession rates for narrow beaches. Additionally, the uncertainty in selecting the landward boundary of the active profile can have a significant impact on shoreline evolution, but this uncertainty can be reduced by using instantaneous forcing conditions instead of arbitrary emerged/submerged profile boundaries.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
P. I. A. Kinnell
Summary: Soil erosion involves detachment and transport processes, with raindrop-driven transport being limited by both detachment and transport. The complex process of raindrop-driven erosion requires consideration of spatial and temporal variations when designing and analyzing experiments.
Article
Engineering, Civil
Nicholas Cohn, Katherine L. Brodie, Bradley Johnson, Margaret L. Palmsten
Summary: In Fall 2015, a large, low-pressure Nor'easter storm and Hurricane Joaquin caused sustained elevated wave and water level conditions along the southeastern Atlantic coast of the United States for multiple weeks. Sea level anomalies exceeding 1 m and offshore wave heights up to 4 m were recorded, resulting in highly variable morphologic changes to the dune over short spatial scales.
COASTAL ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Shawn Naylor, Andrew D. Wickert, Douglas A. Edmonds, Brian J. Yanites
Summary: By studying the evolution of subglacial landscapes beneath the southern Laurentide Ice Sheet, researchers have revealed the dynamics and interactions between ice sheets and evolving subglacial topography. The results suggest that glacial erosion was sufficient to reduce the extent of the ice sheet, lowering it into warmer environments over time.
Article
Environmental Studies
Juan J. Santos-Vendoiro, Juan J. Munoz-Perez, Patricia Lopez-Garcia, Jose Manuel Jodar, Javier Mera, Antonio Contreras, Francisco Contreras, Bismarck Jigena
Summary: A methodology for monitoring sand behaviour and size after beach nourishment process was presented. Four sampling campaigns were conducted on four beaches in the Gulf of Cadiz, with results showing differences between native and nourished sand values disappearing one year after nourishment.
Article
Environmental Sciences
Shan Jiang, Jie Jin, Ying Wu, Yixue Zhang, Yongjun Wei, Carlos Rocha, Juan Severino Pino Ibanhez, Jing Zhang
Summary: The study demonstrates that the removal of NO3− in permeable sediments relies mainly on anaerobic conditions at particle surfaces and the dependence on sedimentary organic matter as an electron supplier. When dissolved oxygen reaches sub-oxic conditions, the addition of glucose benefits NO3− reduction.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Geography, Physical
Roger McLean, Bruce Thom, Jiashu Shen, Thomas Oliver
Summary: A fifty-year time series of high-resolution beach profiles from a southeast Australian beach was analyzed to study the spatial and temporal variability and changes in beach-foredune morphology. The study found five phases of different beach/foreshore conditions over the years. The results showed that the beach maintained high volumes in the past but experienced a decline in recent years.
Article
Engineering, Multidisciplinary
Valentina Macchiarulo, Pietro Milillo, Chris Blenkinsopp, Giorgia Giardina
Summary: Ageing stock and extreme weather events pose a threat to the safety of infrastructure networks. Insufficient funding for infrastructure management hinders systematic inspections, potentially leading to unnoticed distress and catastrophic failures. Synthetic Aperture Radar Interferometry (InSAR) has been proven to accurately detect surface deformations of different assets, offering a cost-effective and near-real-time monitoring tool. However, the large amount of data provided by InSAR requires automated integration with infrastructure inventories. This paper presents a new methodology that automates the integration of InSAR measurements and Geographic Information System-infrastructure inventories to detect potential warnings in extensive transport networks.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Article
Environmental Sciences
Chris E. Blenkinsopp, Tom E. Baldock, Paul M. Bayle, Ollie Foss, Luis P. Almeida, Stefan Schimmels
Summary: The development of coastal regions and rising sea levels have increased the risk of coastal flooding. Traditional methods for measuring wave overtopping are not suitable for dynamically stable coastal protection structures. This study explores the potential use of 2D laser scanners to remotely sense the flow volumes overtopping a porous dynamic revetment and proposes two analysis methods to estimate the overtopping volumes.
Article
Astronomy & Astrophysics
D. Buscombe, E. B. Goldstein, C. R. Sherwood, C. Bodine, J. A. Brown, J. Favela, S. Fitzpatrick, C. J. Kranenburg, J. R. Over, A. C. Ritchie, J. A. Warrick, P. Wernette
Summary: Segmentation of imagery is widely used in the natural sciences, but manual methods are time-consuming and prone to errors. This study presents a fast and semi-automated method for image segmentation and demonstrates its scientific potential through six case studies.
EARTH AND SPACE SCIENCE
(2022)
Article
Astronomy & Astrophysics
D. Buscombe, E. B. Goldstein
Summary: Segmentation of Earth science imagery is a common task and the UNet architecture is reliable for this purpose. Our software, Segmentation Gym, enables researchers to train Deep Learning models for image segmentation, with benefits of reproducible data set creation and quick model experimentation.
EARTH AND SPACE SCIENCE
(2022)
Article
Astronomy & Astrophysics
C. S. Bodine, D. Buscombe, R. J. Best, J. A. Redner, A. J. Kaeser
Summary: The characterization of benthic habitats is essential for aquatic ecosystem science and management. However, existing side-scan sonar systems are often limited by water visibility and depth. To address this issue, we have developed an open-source and freely available post-processing toolset for side-scan sonar recordings.
EARTH AND SPACE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Kevin Martins, Philippe Bonneton, Olivier de Viron, Ian L. Turner, Mitchel D. Harley, Kristen Splinter
Summary: Accurately mapping the changing underwater topography in wave-breaking areas is challenging but crucial for understanding sandy beach morphodynamics. Existing linear depth-inversion algorithms face theoretical and/or technical issues in the surf zone, limiting their accuracy. In this study, we propose a new depth-inversion approach based on Boussinesq theory, which quantifies nonlinear dispersion effects in nearshore waves. Experimental results show that this approach significantly improves accuracy in the surf zone, making it a promising method for practical applications using remote sensing technologies.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Marine
Siya Jin, Daming Wang, Martyn Hann, Keri Collins, Daniel Conley, Deborah Greaves
Summary: The present study aims to provide more data and insights for the hinged type wave energy converters (WEC), especially focusing on the two-body hinged raft WECs. A well-studied generic hinged raft WEC (G-HRWEC) and a 1:25 scale designed hinged raft WEC (D-HRWEC) are considered. The open-source tool WEC-Sim is used in numerical studies and the model is corrected to simulate the two-body hinged WEC. Physical results show linear motion under small waves but significant nonlinearities under large oscillations in the D-HRWEC. The updated WEC-Sim model accurately represents the nonlinear behavior observed in physical experiments with low computational cost, and predicts the annual average power of D-HRWEC in full scale.
Article
Green & Sustainable Science & Technology
Daming Wang, Siya Jin, Martyn Hann, Daniel Conley, Keri Collins, Deborah Greaves
Summary: In this paper, a novel method combining K-means clustering technique and Wave Hub measured data is proposed to determine representative sea states. The results show that the K-means clustering method better preserves the characteristics of the ocean area compared to the binning method. The impact of different regrouping methods on assessing the annual energy output of a WEC model is also investigated.
Article
Multidisciplinary Sciences
Daniel Buscombe, Phillipe Wernette, Sharon Fitzpatrick, Jaycee Favela, Evan B. Goldstein, Nicholas M. Enwright
Summary: This study describes a dataset called Coast Train, which consists of annotated orthomosaic and satellite images of coastal environments. The dataset contains diverse images in space and time, with 1.2 billion labeled pixels representing over 3.6 million hectares.
Article
Geosciences, Multidisciplinary
Kilian Vos, Mitchell D. D. Harley, Ian L. L. Turner, Kristen D. D. Splinter
Summary: Analysis of satellite imagery covering over 8,300 km of sandy coastline reveals that the El Nino/Southern Oscillation drives coherent patterns of beach erosion and accretion around the Pacific Rim. Approximately one-third of all transects experience significant erosion during El Nino phases, while approximately one-quarter of all transects experience significant accretion during La Nina events.
Article
Multidisciplinary Sciences
R. J. McCarroll, N. G. Valiente, M. Wiggins, T. Scott, G. Masselink
Summary: To understand how coastlines change over time in different environments, it is important to have records of beach morphologic change and concurrent hydrodynamic forcing. This study provides data from 2006 to 2021 for two contrasting macrotidal environments in southwest England, including a cross-shore dominated sandy beach and a longshore-dominated reflective gravel beach. The data includes beach profile surveys, topo-bathymetries, as well as observed and modeled wave and water levels. These data serve as a valuable resource for modeling coastal behavior not covered by other available datasets.
Article
Geosciences, Multidisciplinary
J. A. Warrick, K. Vos, D. Buscombe, A. C. Ritchie, J. A. Curtis
Summary: The study investigated the development of sediment wave in the northern California littoral cell of the Klamath River using satellite-derived shoreline positions and historical records. The results showed that the sediment wave propagated rapidly through rocky coastal areas and slowly through sandy coastal areas. The study also suggested that increased sediment discharge in the Klamath River might have initiated the observed accretion wave.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Geosciences, Multidisciplinary
Aikaterini Konstantinou, Tim Scott, Gerd Masselink, Kit Stokes, Daniel Conley, Bruno Castelle
Summary: Earth observation coupled with novel image analysis techniques provides a unique and powerful tool for studying shoreline change at different scales. However, satellite-derived shoreline (SDS) data is limited in certain areas and affected by uncertainties related to environmental factors. We used topographic surveys at two macrotidal sites in the UK to investigate the influence of tidal elevation and wave action on SDS accuracy. Our results show that applying appropriate water level corrections can significantly improve SDS accuracy and that the optimal approach depends on the beach type and shoreline translation method used.
Article
Environmental Sciences
Mitchell D. Harley, Gerd Masselink, Amaia Ruiz de Alegria-Arzaburu, Nieves G. Valiente, Tim Scott
Summary: High-resolution morphology data from Australia, the UK and Mexico shows that episodic coastal sediment deposition during extreme storms can offset projected shoreline retreat caused by sea level rise. Extreme storms, although causing erosion, can also contribute positively to the sediment budget by exchanging sediment between different areas, mitigating the impacts of sea level rise.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
