Top 10 Eartharxiv Papers Today in Engineering


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#1. Computationally Efficient Tsunami Modelling on Graphics Processing Units (GPU)
Reza Amouzgar, Qiuhua Liang, Peter Clarke, Tomohiro Yasuda, Hajime Mase
Tsunamis generated by earthquakes commonly propagate as long waves in the deep ocean and develop into sharp-fronted surges moving rapidly towards the coast in shallow water, which may be effectively simulated by hydrodynamic models solving the nonlinear shallow water equations (SWEs). However, most of the existing tsunami models suffer from long simulation time for large-scale real-world applications. In this work, a graphics processing unit (GPU) accelerated finite volume shock-capturing hydrodynamic model is presented for computationally efficient tsunami simulations. The improved performance of the GPU-accelerated tsunami model is demonstrated through a laboratory benchmark test and a field-scale simulation.
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Authors: 5
Total Words: 4688
Unqiue Words: 1773

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#2. Estimating flood quantiles at ungauged sites using nonparametric regression methods with spatial components
Martin Durocher, Donald H. Burn, Shabnam Mostofi Zadeh, Fahim Ashkar
Prediction of flood quantiles at ungauged sites has been investigated using several nonparametric regression methods including: local regression based on regions of influence, neural networks and generalized additive models (GAM). These methods were used to describe the relationship between run-off variables and catchment descriptors to predict flood quantiles. Previous work reported the presence of spatial correlation in the residuals for these models. To this end, this study proposes and investigates ways of incorporating spatial components. An L-moments regression technique (LRT) is developed to predict L-moments of target sites and flood quantiles are derived by aggregating quantiles from multiple candidate distributions. The predictive power of the proposed methods is evaluated on a large database of Canadian rivers using cross-validation. The results are examined inside different provinces and hydrological regions to assess the behaviour of the methods. The results show that GAM and local regression using respectively thin...
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Authors: 4
Total Words: 10335
Unqiue Words: 3590

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#3. Backwater Controls on the Sedimentology, Kinematics and Geometry of Bar Deposits in Coastal Rivers
Anjali M Fernandes, Virginia B. Smith, Kashauna G. Mason
The backwater reach of coastal rivers is associated with considerable spatial and temporal variability in water and sediment flux. Here we test the hypothesis that the spatial and temporal variability in water flux and particle sizes in transport result in systematic changes in the geometry of bank-attached bars across the backwater transition. Measured transverse slopes of bank-attached bars in the Mississippi and Trinity Rivers show a systematic increase where the river transitions from normal flow to the backwater. We propose a simple force balance relationship, in which the transverse slope of the bars constructed through traction transport varies in proportion to the square of depth-averaged flow velocity and is inversely proportional to the square of the median particle size of the supplied sediment, in bends with similar curvature. The observed trend is therefore explained by a downstream reduction in particle sizes coupled with a downstream increase in flow velocity across the backwater transition at high flow.
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Authors: 3
Total Words: 4505
Unqiue Words: 1896

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#4. Tectonic and oceanographic process interactions archived in the Late Cretaceous to Recent deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia
Harya Dwi Nugraha, Christopher Aiden-Lee Jackson, Howard Johnson, David M Hodgson, Matthew T. Reeve
Deep-marine deposits provide a valuable archive of process interactions between sediment gravity flows, pelagic sedimentation, and thermo-haline bottom-currents. Stratigraphic successions can also record plate-scale tectonic processes (e.g. continental breakup and shortening) that impact long-term ocean circulation patterns, including changes in climate and biodiversity. One such setting is the Exmouth Plateau, offshore NW Australia, which has been a relatively stable, fine-grained carbonate-dominated continental margin from the Late Cretaceous to the Recent. During this time, the Exmouth Plateau was located between areas of continental breakup and shortening. We combine extensive 2D (~40,000 km) and 3D (3,627 km2) seismic reflection data with lithologic and biostratigraphic information from wells to reconstruct the tectonic and oceanographic evolution of this deep-marine margin. We identified three large-scale seismic units (SUs): (1) SU-1 (Late Cretaceous) is up to 500 m-thick, and characterised by NE-SW-trending, slope-normal...
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hryadn: 🚨#paper ALERT🚨 Check out my first-ever #paper w/ @seis_matters, Howard, @stratleeds and Matt, in Basin Research (https://t.co/8Ll6WpX0nD) on tectonic and oceanographic processes archived in Exmouth Plateau stratigraphy! Funded by @LPDP_RI. Pre-print: https://t.co/PdptIcivcx🙏🏼😊 https://t.co/5WjfrTDduu
hryadn: An updated version (v.2) of our pre-print on the palaeoceanography of the Exmouth Plateau, NW Australia, is now online! Check this out: https://t.co/PdptIcivcx cc: @seis_matters @stratleeds https://t.co/p8Ote5hdVG
hryadn: Hmm, looks like the Exmouth Plateau has the highest probability of tsunami hazard 🤔 why would that be? Some reasons are maybe in this pre-print https://t.co/PdptIcivcx on @EarthArXiv 😊 https://t.co/zts6IBNonQ
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Authors: 5
Total Words: 11969
Unqiue Words: 4375

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#5. Geostatistical Earth Modelling of Cyclic Depositional Facies and Diagenesis
Thomas Le Blévec, Olivier Dubrule, Cédric M. John, Gary J. Hampson
In siliciclastic and carbonate reservoirs, depositional facies are often described as being organized in cyclic successions that are overprinted by diagenesis. Most reservoir modelling workflows are not able to reproduce stochastically such patterns. Herein, a novel geostatistical method is developed to model depositional facies architectures that are rhythmic and cyclic, together with superimposed diagenetic facies. The method uses truncated Pluri-Gaussian random functions constrained by transiograms. Cyclicity is defined as an asymmetric ordering between facies, and its direction is given by a three-dimensional vector, called shift. This method is illustrated on two case studies. Outcrop data of the Triassic Latemar carbonate platform, northern Italy, are used to model shallowing-upward facies cycles in the vertical direction. A satellite image of the modern Bermuda platform interior is used to model facies cycles in the windward-to-leeward lateral direction. As depositional facies architectures are modelled using two...
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Authors: 4
Total Words: 12354
Unqiue Words: 3805

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#6. Evaluation of open-access global digital elevation models (AW3D30, SRTM and ASTER) for flood modelling purposes
Laurent Courty, Julio César Soriano-Monzalvo, Adrián Pedrozo-Acuña
Digital Elevation Models (DEM) are a key piece of information for the accurate representation of topographic controls exerted in hydrologic and hydraulic models. Many practitioners rely on open-access global datasets usually obtained from space-borne survey due to the cost and sparse coverage of sources of higher resolution. In may 2016 the Japan Aerospace eXploration Agency publicly released an open-access global Digital Surface Model (DSM) at an horizontal resolution of 30m, the ALOS World 3D-30m (AW3D30). So far no published study did an in-depth assessment of the flood modelling capabilities of this new product. The purpose of this investigation is to 1) present an assessment of the capacity of the AW3D30 for flood modelling purposes and 2) to compare its performance with regards to computed water levels and flood extent maps calculated using other freely available 30m DEM for model setup (e.g. SRTM and ASTER). For this comparison, the reference to reality is given by the water levels and flood extent maps computed with the...
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01717257469: RT @LaurentCourty: New version of our preprint about the evaluation of global elevation model for flood modelling. https://t.co/XHxGew8gZl
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Authors: 3
Total Words: 9791
Unqiue Words: 3352

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#7. Creating interactive scientific publications using bindings
Markus Konkol, Christian Kray, Jan Suleiman
Many scientific publications report on computational results based on code and data but even when code and data are published, the main text is usually provided in a separate, traditional format such as PDF. Since code, data, and text are not linked on a deep level, it is difficult for readers and reviewers to understand and retrace how the authors achieved a specific result that is reported in the main text, e.g. a figure, table, or number. In addition, a lot of effort is required to make use of new opportunities afforded by data and code availability such as re-running analyses with changed parameters. In order to overcome this issue and to enable more interactive publications that support scientists in more deeply exploring the reported results, we present the concept, implementation, and initial evaluation of bindings. A binding describes which data subsets, code lines, and parameters produce a specific result that is reported in the main text (e.g. as a figure, table, or number). Based on a prototypical implementation of...
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MarkusKonkol: #Preprint time @EarthArXiv: Creating interactive scientific publications using bindings. Using what? Feel free to find it out: https://t.co/jPUaFLNGEb #openscience #futurepaper #interactivefigures #reproducibility
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Authors: 3
Total Words: 10501
Unqiue Words: 2774

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#8. Comparison of 0-D, 1-D and 2-D model capabilities for tidal range energy resource assessments
Athanasios Angeloudis, Matthew Piggott, Stephan C. Kramer, Alexandros Avdis, Daniel Coles, Marios Christou
Tidal range energy projects present an attractive means for the predictable and large-scale generation of electricity from the marine environment. In particular, proposals are under consideration in UK waters, with their feasibility currently being under high levels of scrutiny. This is due to a combination of potential environmental and socio-economic impacts that are challenging to quantify in the absence of a standardised methodology. At present, numerical models are being developed to provide robust resource/impact assessments and inform future designs. However, modelling inconsistencies in the representation of tidal power plants, operational algorithms, and turbine technology parameters can be observed in the studies to-date. This has made comparisons between proposed designs difficult to accomplish and rely upon. We present a series of models that progressively and consistently introduce spatial dimensions in resource prediction applications. The capabilities and limitations of each of these models are discussed with regard...
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Authors: 6
Total Words: 7097
Unqiue Words: 2258

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#9. Vulnerability of Louisiana’s coastal wetlands to present-day rates of relative sea-level rise
Krista L. Jankowski, Torbjörn E. Törnqvist, Anjali M Fernandes
Coastal Louisiana has lost about 5,000km2 of wetlands over the past century and concern exists whether remaining wetlands will persist while facing some of the world’s highest rates of relative sea-level rise (RSLR). Here we analyse an unprecedented data set derived from 274 rod surface-elevation table-marker horizon stations, to determine present-day surface-elevation change, vertical accretion and shallow subsidence rates. Comparison of vertical accretion rates with RSLR rates at the land surface (present-day RSLR rates are 12±8mm per year) shows that 65% of wetlands in the Mississippi Delta (SE Louisiana) may keep pace with RSLR, whereas 58% of the sites in the Chenier Plain (SW Louisiana) do not, rendering much of this area highly vulnerable to RLSR. At least 60% of the total subsidence rate occurs within the uppermost 5–10m, which may account for the higher vulnerability of coastal Louisiana wetlands compared to their counterparts elsewhere.
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Authors: 3
Total Words: 5792
Unqiue Words: 2058

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#10. Micromorphological report of Hof ter Coign
Arnald Puy
Micromorphological report of the Hof ter Coign site (Belgium)
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Total Words: 2397
Unqiue Words: 1032

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