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  1. Article ; Online: Monitoring of Coastal Boulder Movements by Storms and Calculating Volumetric Parameters Using the Volume Differential Method Based on Point Cloud Difference

    Yao Yao / Helene Burningham / Jasper Knight / David Griffiths

    Remote Sensing, Vol 15, Iss 1526, p

    2023  Volume 1526

    Abstract: The measurements of boulder volume and axial length play significant roles in exploring the evolution of coastal boulder deposition, which provides a theoretical framework to examine the hydrodynamics of extreme wave events. At present, the application ... ...

    Abstract The measurements of boulder volume and axial length play significant roles in exploring the evolution of coastal boulder deposition, which provides a theoretical framework to examine the hydrodynamics of extreme wave events. At present, the application of structure-from-motion (SfM) to unmanned aerial system (UAS) imagery is one of the most used boulder surveying techniques. However, the monitoring of boulder movement and the accurate measurement of boulder morphometrics are rarely investigated in combination. In this study, UAS surveys were used to monitor moving boulders and measure boulder volumes using the volume differential method based on the differences of dense point clouds. This was undertaken at a site on the rocky shoreline of northwest Ireland in three repeated UAS surveys conducted in 2017, 2018, and 2019. The results from UAS monitoring and mapping of the distribution of 832 moving boulders in the study area over the 3-year period showed that boulders located in different zones of the coast vary significantly in their mobility. The main findings reveal that the theoretical error of the volume, obtained using the volume differential method, was estimated as 1–3.9%, which is much smaller than that of the conventional method of estimating volume using a tape measure.
    Keywords structure-from-motion ; boulder morphometry ; storm wave forcing ; rocky shoreline ; UAS ; UAV ; Science ; Q
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: The need for data integration to address the challenges of climate change on the Guyana coast

    Temitope D. Timothy Oyedotun / Helene Burningham

    Geography and Sustainability, Vol 2, Iss 4, Pp 288-

    2021  Volume 297

    Abstract: Guyana's capacity to address the impacts of climate change on its coastal environment requires the ability to monitor, quantify and understand coastal change over short-, medium- and long- term. Understanding the drivers of change in coastal and marine ... ...

    Abstract Guyana's capacity to address the impacts of climate change on its coastal environment requires the ability to monitor, quantify and understand coastal change over short-, medium- and long- term. Understanding the drivers of change in coastal and marine environment can be achieved through the accurate measurement and critical analyses of morphologies, flows, processes and responses. This manuscript presents a strategy developed to create a central resource, database and web-based platform to integrate data and information on the drivers and the changes within Guyana coastal and marine environment. The strategy involves four complimentary work packages including data collection, development of a platform for data integration, application of the data for coastal change analyses and consultation with stakeholders. The last aims to assess the role of the integrated data systems to support strategic governance and sustainable decision-making. It is hoped that the output of this strategy would support the country's climate-focused agencies, organisations, decision-makers, and researchers in their tasks and endeavours.
    Keywords Climate adaptation ; Climate mitigation ; Data needs ; Data integration ; Web-based platform ; Geography (General) ; G1-922 ; Environmental sciences ; GE1-350
    Subject code 333
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Sand dunes and ventifacts on the coast of South Africa

    Knight, Jasper / Helene Burningham

    Aeolian research. 2019 Feb. 21,

    2019  

    Abstract: The Indian Ocean coast of South Africa is characterized by strong seasonal alongshore winds and high sediment availability, resulting in formation of different types of active and vegetated sand dunes landward of sandy beaches. This study considers the ... ...

    Abstract The Indian Ocean coast of South Africa is characterized by strong seasonal alongshore winds and high sediment availability, resulting in formation of different types of active and vegetated sand dunes landward of sandy beaches. This study considers the dynamics of windblown sand systems along part of this coastal stretch by presenting geomorphological evidence from ventifacts and sand dunes, which can inform on integrated sand transport and depositional system dynamics, respectively. Crestline positions of supratidal translational dunes were mapped from aerial images (2003–2018); results show a range of responses over different time windows, including systematic migration in particular to the northeast, and crestline rotation. Changes in dune geometry are linked closely to changes in synoptic climate patterns, determining seasonal wind regimes. Exceptionally well developed ventifacts are present on clasts within deflation lags located between translational dune ridges. Based on morphological analysis of ventifacts (n=49), the dominant geomorphically-effective wind direction is from west or northwest, oblique to regional prevailing winds. An important conclusion of this study is that, although both ventifacts and dunes at this site reflect the same wind forcing, they show quite different morphological responses and dynamical behaviours. A reason for such differences may be the role of microtopographic effects on near-surface wind patterns. This means that neither dunes nor ventifacts alone can be used as unambiguous indicators of wind regime, and instead should be viewed as integrated elements of coastal sediment systems.
    Keywords aerial photography ; beaches ; climate ; coastal sediments ; coasts ; dunes ; geometry ; sand ; wind direction ; Indian Ocean ; South Africa
    Language English
    Dates of publication 2019-0221
    Size p. .
    Publishing place Elsevier B.V.
    Document type Article
    Note Pre-press version
    ISSN 1875-9637
    DOI 10.1016/j.aeolia.2019.02.003
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Evaluating the Response of Mediterranean-Atlantic Saltmarshes to Sea-Level Rise

    Miriam Fernandez-Nunez / Helene Burningham / Pilar Díaz-Cuevas / José Ojeda-Zújar

    Resources, Vol 8, Iss 1, p

    2019  Volume 50

    Abstract: Saltmarshes provide high-value ecological services and play an important role in coastal ecosystems and populations. As the rate of sea level rise accelerates in response to climate change, saltmarshes and tidal environments and the ecosystem services ... ...

    Abstract Saltmarshes provide high-value ecological services and play an important role in coastal ecosystems and populations. As the rate of sea level rise accelerates in response to climate change, saltmarshes and tidal environments and the ecosystem services that they provide could be lost in those areas that lack sediment supply for vertical accretion or space for landward migration. Predictive models could play an important role in foreseeing those impacts, and to guide the implementation of suitable management plans that increase the adaptive capacity of these valuable ecosystems. The SLAMM (sea-level affecting marshes model) has been extensively used to evaluate coastal wetland habitat response to sea-level rise. However, uncertainties in predicted response will also reflect the accuracy and quality of primary inputs such as elevation and habitat coverage. Here, we assessed the potential of SLAMM for investigating the response of Atlantic-Mediterranean saltmarshes to future sea-level rise and its application in managerial schemes. Our findings show that SLAMM is sensitive to elevation and habitat maps resolution and that historical sea-level trend and saltmarsh accretion rates are the predominant input parameters that influence uncertainty in predictions of change in saltmarsh habitats. The understanding of the past evolution of the system, as well as the contemporary situation, is crucial to providing accurate uncertainty distributions and thus to set a robust baseline for future predictions.
    Keywords sea-level rise ; saltmarshes ; coastal wetland management ; SLAMM ; Science ; Q
    Subject code 333
    Language English
    Publishing date 2019-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: Conceptualising and mapping coupled estuary, coast and inner shelf sediment systems

    French, Jon / Gillian Thornhill / Helene Burningham / Richard Whitehouse / Robert J. Nicholls

    Geomorphology. 2016 Mar. 01, v. 256

    2016  

    Abstract: Whilst understanding and predicting the effects of coastal change are primarily modelling problems, it is essential that we have appropriate conceptual frameworks for (1) the formalisation of existing knowledge; (2) the formulation of relevant scientific ...

    Abstract Whilst understanding and predicting the effects of coastal change are primarily modelling problems, it is essential that we have appropriate conceptual frameworks for (1) the formalisation of existing knowledge; (2) the formulation of relevant scientific questions and management issues; (3) the implementation and deployment of predictive models; and (4) meaningful engagement involvement of stakeholders. Important progress continues to be made on the modelling front, but our conceptual frameworks have not evolved at a similar pace. Accordingly, this paper presents a new approach that re-engages with formal systems analysis and provides a mesoscale geomorphological context within which the coastal management challenges of the 21st century can be more effectively addressed. Coastal and Estuarine System Mapping (CESM) is founded on an ontology of landforms and human interventions that is partly inspired by the coastal tract concept and its temporal hierarchy of sediment sharing systems, but places greater emphasis on a hierarchy of spatial scales. This extends from coastal regions, through landform complexes, to landforms, the morphological adjustment of which is constrained by diverse forms of human intervention. Crucially, CESM integrates open coastal environments with estuaries and relevant portions of the inner shelf that have previously been treated separately.In contrast to the nesting of littoral cells that has hitherto framed shoreline management planning, CESM charts a complex web of interactions, of which a sub-set of mass transfer pathways defines the sediment budget, and a multitude of human interventions constrains natural landform behaviour. Conducted within a geospatial framework, CESM constitutes a form of knowledge formalisation in which disparate sources of information (published research, imagery, mapping, raw data etc.) are generalised into usable knowledge. The resulting system maps provide a framework for the development and application of predictive models and a repository for the outputs they generate (not least, flux estimates for the major sediment system pathways). They also permit comparative analyses of the relative abundance of landforms and the multi-scale interactions between them. Finally, they articulate scientific understanding of the structure and function of complex geomorphological systems in a way that is transparent and accessible to diverse stakeholder audiences. As our models of mesoscale landform evolution increase in sophistication, CESM provides a platform for a more participatory approach to their application to coastal and estuarine management.
    Keywords coasts ; estuaries ; humans ; information sources ; littoral zone ; mass transfer ; models ; nesting ; planning ; prediction ; sediments ; shorelines ; stakeholders ; systems analysis
    Language English
    Dates of publication 2016-0301
    Size p. 17-35.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 58028-4
    ISSN 0169-555X
    ISSN 0169-555X
    DOI 10.1016/j.geomorph.2015.10.006
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Simulating mesoscale coastal evolution for decadal coastal management: A new framework integrating multiple, complementary modelling approaches

    van Maanen, Barend / A. Brad Murray / Andres Payo / Andrew Barkwith / Davide Bonaldo / Gillian Thornhill / Helene Burningham / Ian H. Townend / James Sutherland / Jon R. French / Mick van der Wegen / Mike J.A. Walkden / Robert J. Nicholls

    Geomorphology. 2016 Mar. 01, v. 256

    2016  

    Abstract: Coastal and shoreline management increasingly needs to consider morphological change occurring at decadal to centennial timescales, especially that related to climate change and sea-level rise. This requires the development of morphological models ... ...

    Abstract Coastal and shoreline management increasingly needs to consider morphological change occurring at decadal to centennial timescales, especially that related to climate change and sea-level rise. This requires the development of morphological models operating at a mesoscale, defined by time and length scales of the order 101 to 102years and 101 to 102km. So-called ‘reduced complexity’ models that represent critical processes at scales not much smaller than the primary scale of interest, and are regulated by capturing the critical feedbacks that govern landform behaviour, are proving effective as a means of exploring emergent coastal behaviour at a landscape scale. Such models tend to be computationally efficient and are thus easily applied within a probabilistic framework. At the same time, reductionist models, built upon a more detailed description of hydrodynamic and sediment transport processes, are capable of application at increasingly broad spatial and temporal scales. More qualitative modelling approaches are also emerging that can guide the development and deployment of quantitative models, and these can be supplemented by varied data-driven modelling approaches that can achieve new explanatory insights from observational datasets. Such disparate approaches have hitherto been pursued largely in isolation by mutually exclusive modelling communities. Brought together, they have the potential to facilitate a step change in our ability to simulate the evolution of coastal morphology at scales that are most relevant to managing erosion and flood risk. Here, we advocate and outline a new integrated modelling framework that deploys coupled mesoscale reduced complexity models, reductionist coastal area models, data-driven approaches, and qualitative conceptual models. Integration of these heterogeneous approaches gives rise to model compositions that can potentially resolve decadal- to centennial-scale behaviour of diverse coupled open coast, estuary and inner shelf settings. This vision is illustrated through an idealised composition of models for a ~70km stretch of the Suffolk coast, eastern England. A key advantage of model linking is that it allows a wide range of real-world situations to be simulated from a small set of model components. However, this process involves more than just the development of software that allows for flexible model coupling. The compatibility of radically different modelling assumptions remains to be carefully assessed and testing as well as evaluating uncertainties of models in composition are areas that require further attention.
    Keywords climate change ; coasts ; computer software ; data collection ; estuaries ; hydrodynamics ; landscapes ; models ; risk ; sea level ; sediment transport ; shorelines ; uncertainty ; England
    Language English
    Dates of publication 2016-0301
    Size p. 68-80.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 58028-4
    ISSN 0169-555X
    ISSN 0169-555X
    DOI 10.1016/j.geomorph.2015.10.026
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

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