scholarly journals An integrated approach to determine three‐dimensional accretion geometries of tidal point bars: Examples from the Venice Lagoon (Italy)

Sedimentology ◽  
2020 ◽  
Vol 68 (1) ◽  
pp. 449-476 ◽  
Author(s):  
Marta Cosma* ◽  
Na Yan ◽  
Luca Colombera ◽  
Nigel P. Mountney ◽  
Andrea D’Alpaos ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Integrated Approach ◽  
Venice Lagoon ◽  
Point Bars

scholarly journals Geomorphological Geometries and High-Resolution Seismic Sequence Stratigraphy of Malay Basin’s Fluvial Succession

2021 ◽  
Vol 11 (11) ◽  
pp. 5156
Author(s):  
Abd Al-Salam Al-Masgari ◽  
Mohamed Elsaadany ◽  
Numair A. Siddiqui ◽  
Abdul Halim Abdul Latiff ◽  
Azli Abu Bakar ◽  
...  
Keyword(s):  
High Resolution ◽  
Sequence Stratigraphy ◽  
Three Dimensional ◽  
Seismic Attributes ◽  
Seismic Facies ◽  
Seismic Sequence ◽  
3D Seismic ◽  
Seismic Sequences ◽  
Seismic Sequence Stratigraphy ◽  
Point Bars

This study identified the Pleistocene depositional succession of the group (A) (marine, estuarine, and fluvial depositional systems) of the Melor and Inas fields in the central Malay Basin from the seafloor to approximately −507 ms (522 m). During the last few years, hydrocarbon exploration in Malay Basin has moved to focus on stratigraphic traps, specifically those that existed with channel sands. These traps motivate carrying out this research to image and locate these kinds of traps. It can be difficult to determine if closely spaced-out channels and channel belts exist within several seismic sequences in map-view with proper seismic sequence geomorphic elements and stratigraphic surfaces seismic cross lines, or probably reinforce the auto-cyclic aggregational stacking of the avulsing rivers precisely. This analysis overcomes this challenge by combining well-log with three-dimensional (3D) seismic data to resolve the deposition stratigraphic discontinuities’ considerable resolution. Three-dimensional (3D) seismic volume and high-resolution two-dimensional (2D) seismic sections with several wells were utilized. A high-resolution seismic sequence stratigraphy framework of three main seismic sequences (3rd order), four Parasequences sets (4th order), and seven Parasequences (5th order) have been established. The time slice images at consecutive two-way times display single meandering channels ranging in width from 170 to 900 m. Moreover, other geomorphological elements have been perfectly imaged, elements such as interfluves, incised valleys, chute cutoff, point bars, and extinction surfaces, providing proof of rapid growth and transformation of deposits. The high-resolution 2D sections with Cosine of Phase seismic attributes have facilitated identifying the reflection terminations against the stratigraphic amplitude. Several continuous and discontinuous channels, fluvial point bars, and marine sediments through the sequence stratigraphic framework have been addressed. The whole series reveals that almost all fluvial systems lay in the valleys at each depositional sequence’s bottom bars. The degradational stacking patterns are characterized by the fluvial channels with no evidence of fluvial aggradation. Moreover, the aggradation stage is restricted to marine sedimentation incursions. The 3D description of these deposits permits distinguishing seismic facies of the abandoned mud channel and the sand point bar deposits. The continuous meandering channel, which is filled by muddy deposits, may function as horizontal muddy barriers or baffles that might isolate the reservoir body into separate storage containers. The 3rd, 4th, and 5th orders of the seismic sequences were established for the studied succession. The essential geomorphological elements have been imaged utilizing several seismic attributes.

Constructive Distributed Work: An Integrated Approach to Sustainable Collaboration and Research for Distributed Teams

2021 ◽  
pp. 105065192110214
Author(s):  
Michelle McMullin ◽  
Bradley Dilger
Keyword(s):  
Best Practices ◽  
Team Building ◽  
Three Dimensional ◽  
Integrated Approach ◽  
Interdisciplinary Teams ◽  
Digital Tools ◽  
Distributed Teams ◽  
Distributed Work ◽  
Team Members ◽  
Negative Impacts

Academic work increasingly involves creating digital tools with interdisciplinary teams distributed across institutions and roles. The negative impacts of distributed work are described at length in technical communication scholarship, but such impacts have not yet been realized in collaborative practices. By integrating attention to their core ethical principles, best practices, and work patterns, the authors are developing an ethical, sustainable approach to team building that they call constructive distributed work. This article describes their integrated approach, documents the best practices that guide their research team, and models the three-dimensional thinking that helps them develop sustainable digital tools and ensure the consistent professional development of all team members.

scholarly journals Water Use Conflict and Coordination between Agricultural and Wetlands—A Case Study of Yanqi Basin

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3225
Author(s):  
Mengyao Jiang ◽  
Shuntao Xie ◽  
Shuixian Wang
Keyword(s):  
Water Use ◽  
Groundwater Level ◽  
Assessment Tool ◽  
Scientific Evidence ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
Integrated Approach ◽  
Groundwater Exploitation ◽  
Lake Recovery ◽  
Yanqi Basin

Increased groundwater extraction leads to the decrease of the extent of wetlands due to the implementation of a water-saving transformation project in an arid irrigation area. The application of integrated mitigation tools and strategies in China have increasing significance. In this study, an integrated approach (SWAT-MODFLOW) was followed; it is based on a soil and water assessment tool (SWAT) coupled with a modular three-dimensional finite difference groundwater model (MODFLOW). Recharge and evaporation values were estimated by SWAT and were then used to simulate groundwater in a MODFLOW model. Calibration (over the years 2000–2010) and validation (over the years 2010–2016) were performed, based on observed groundwater-level data; results showed that the combined SWAT-MODFLOW provides more accurate simulation and prediction of the dynamic changes of surface water and groundwater in irrigation areas than results from individual MODFLOW models. This method was applied to the Yanqi Basin, which is one of the most appropriate arid agricultural basins for modeling lake wetland and groundwater in China. The correlation coefficients (R2) between the simulated and real groundwater level are 0.96 and 0.91 in SWAT-MODFLOW and MODFLOW, respectively. With the gradual increase in the extraction to 248%, 0.62 × 108 m3 of groundwater discharged into the lake became −2.25 × 108 m3. The lake level drops 1.3 m compared with the current year, when the groundwater exploitation increases by 10 × 108 m3/year. Overall, the results of the coupling model offer scientific evidence for agricultural water management and lake recovery, so as to enhance the water use coordination.

scholarly journals Mission Performance Simulation of Integrated Helicopter–Engine Systems Using an Aeroelastic Rotor Model

2013 ◽  
Vol 135 (9) ◽  
Author(s):  
Ioannis Goulos ◽  
Panagiotis Giannakakis ◽  
Vassilios Pachidis ◽  
Pericles Pilidis
Keyword(s):  
Fuel Consumption ◽  
Three Dimensional ◽  
Numerical Procedure ◽  
Engine Performance ◽  
Flight Dynamics ◽  
Flight Test ◽  
Integrated Approach ◽  
Operating Conditions ◽  
Main Rotor ◽  
Engine Systems

This paper presents an integrated approach, targeting the comprehensive assessment of combined helicopter engine designs within designated operations. The developed methodology comprises a series of individual modeling theories, each applicable to a different aspect of helicopter flight dynamics and performance. These relate to rotor blade modal analysis, three-dimensional flight path definition, flight dynamics trim solution, aeroelasticity, and engine performance. The individual mathematical models are elaborately integrated within a numerical procedure, solving for the total mission fuel consumption. The overall simulation framework is applied to the performance analysis of the Aérospatiale SA330 helicopter within two generic, twin-engine medium helicopter missions. An extensive comparison with flight test data on main rotor trim controls, power requirements, and unsteady blade structural loads is presented. It is shown that, for the typical range of operating conditions encountered by modern twin-engine medium civil helicopters, the effect of operational altitude on fuel consumption is predominantly influenced by the corresponding effects induced on the engine rather than on airframe rotor performance. The implications associated with the implicit coupling between aircraft and engine performance are discussed in the context of mission analysis. The potential to comprehensively evaluate integrated helicopter engine systems within complete three-dimensional operations using modeling fidelity designated for main rotor design applications is demonstrated. The proposed method essentially constitutes an enabler in terms of focusing the rotorcraft design process on designated operation types rather than on specific sets of flight conditions.

X-ray microtomographic imaging and analysis for basic research

2006 ◽  
Vol 21 (2) ◽  
pp. 125-131 ◽  
Author(s):  
J. H. Dunsmuir ◽  
S. Bennett ◽  
L. Fareria ◽  
A. Mingino ◽  
M. Sansone
Keyword(s):  
Spatial Resolution ◽  
Three Dimensional ◽  
Basic Research ◽  
Integrated Approach ◽  
Imaging Method ◽  
Structure Property ◽  
3D Images ◽  
X Ray ◽  
Structure Property Relationships ◽  
Essential Components

For research facilities with access to synchrotron X-ray sources, X-ray absorption microtomography (XMT) has evolved from an experimental imaging method to a specialized, if not yet routine, microscopy for imaging the three-dimensional (3D) distribution of linear attenuation coefficients and, in some cases, elemental concentration with micron spatial resolution. Recent advances in source and detector design have produced conventional X-ray source instruments with comparable spatial resolution but with lower throughput and without element specific imaging. Both classes of instrument produce 3D images for analysis. We discuss an integrated approach for the implementation of analytical XMT to support basic research into the structure-property relationships of a variety of materials. The essential components include instrumentation for collecting quantitative 3D images, a 3D image processing environment to address questions as to the quantity, composition, geometry, and relationships among the features in one or more images, and visualization to provide insight and communicate results. We give examples of image analysis of resolved and unresolved pore spaces of sandstones.

scholarly journals Mission Performance Simulation of Integrated Helicopter–Engine Systems Using an Aeroelastic Rotor Model

2013 ◽  
Author(s):  
Ioannis Goulos ◽  
Panos Giannakakis ◽  
Vassilios Pachidis ◽  
Pericles Pilidis
Keyword(s):  
Fuel Consumption ◽  
Three Dimensional ◽  
Numerical Procedure ◽  
Engine Performance ◽  
Flight Dynamics ◽  
Flight Test ◽  
Integrated Approach ◽  
Operating Conditions ◽  
Main Rotor ◽  
Engine Systems

This paper presents an integrated approach, targeting the comprehensive assessment of combined helicopter–engine designs, within designated operations. The developed methodology comprises a series of individual modeling theories, each applicable to a different aspect of helicopter flight dynamics and performance. These relate to rotor blade modal analysis, three-dimensional flight path definition, flight dynamics trim solution, aeroelasticity and engine performance. The individual mathematical models are elaborately integrated within a numerical procedure, solving for the total mission fuel consumption. The overall simulation framework is applied to the performance analysis of the Aérospatiale SA330 helicopter within two generic, twin-engine medium helicopter missions. An extensive comparison with flight test data on main rotor trim controls, power requirements and unsteady blade structural loads is presented. It is shown that, for the typical range of operating conditions encountered by modern twin-engine medium civil helicopters, the effect of operational altitude on fuel consumption is predominantly influenced by the corresponding effects induced on the engine, rather than on airframe–rotor performance. The implications associated with the implicit coupling between aircraft and engine performance, are discussed in the context of mission analysis. The potential to comprehensively evaluate integrated helicopter–engine systems within complete three-dimensional operations, using modeling fidelity designated for main rotor design applications, is demonstrated. The proposed method essentially constitutes an enabler in terms of focusing the rotorcraft design process on designated operation types, rather than on specific sets of flight conditions.

An Integrated Approach to Optimal Three Dimensional Layout and Routing

1998 ◽  
Vol 120 (3) ◽  
pp. 510-512 ◽  
Author(s):  
S. Szykman ◽  
J. Cagan ◽  
P. Weisser
Keyword(s):  
Simulated Annealing ◽  
Three Dimensional ◽  
Integrated Approach ◽  
Substantial Improvement ◽  
Routing Algorithms ◽  
Future Research ◽  
Test Case ◽  
Integrated Method ◽  
Route Design ◽  
Product Layout

This paper integrates simulated annealing-based component packing, layout and routing algorithms into a concurrent approach to product layout optimization. The design of a heat pump is presented to compare the integrated method to the previous sequential layout-then-route approach; results show a substantial improvement in route design with more organized component placements. The example is given in detail to provide a test case for future research in this area.

scholarly journals Modal analysis of a complex shell structure under operational loads

2021 ◽  
pp. 5-13
Author(s):  
Viktor Bazhenov ◽  
Olga Krivenko ◽  
Andrii Kozak
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Shell Structure ◽  
Cooling Tower ◽  
Three Dimensional ◽  
Integrated Approach ◽  
Wind Pressure ◽  
Step Method ◽  
Static Mechanical ◽  
The Moment

The results of calculation of a complex shell structure under the action of operational loads are presented. A three-section cooling tower, called a three-petal cooling tower, is regarded as a complex-shaped structure. Three variants of loads on the shell are considered: wind pressure, heating and load combination. The design model of a shell of a complex shape is based on the developed universal spatial finite element. The universal spatial finite element allows one to take into account the geometric features of structural elements for a thin shell (constant or varying thickness, knees, ribs, cover plates, holes, cavities, channels, inserts, facets) and multilayer structure of the material. According to the method, thin and medium thickness shells of various shapes and structures are considered. The shells are under the action of static mechanical and temperature loads. The finite element method is based on the unified positions of the three-dimensional geometrically nonlinear theory of thermoelasticity and the moment finite element scheme. The method for determining the natural vibrations of thin-walled shell structures is based on an integrated approach. Modal analysis is carried out taking into account the prestressed and deformed states of the shell at each step of thermomechanical loading. Thus, the problem of determining the natural frequencies and vibration modes of the shell is solved by the step method in two stages.

scholarly journals Comparative Analysis of Summer Upwelling and Downwelling Events in NW Spain: A Model-Observations Approach

2020 ◽  
Vol 12 (17) ◽  
pp. 2762
Author(s):  
Pablo Lorente ◽  
Silvia Piedracoba ◽  
Pedro Montero ◽  
Marcos G. Sotillo ◽  
María Isabel Ruiz ◽  
...  
Keyword(s):  
Coastal Upwelling ◽  
Critical Role ◽  
Three Dimensional ◽  
Low Frequency ◽  
Surface Current ◽  
Integrated Approach ◽  
Coastal System ◽  
Upwelling System ◽  
Layer Flow ◽  
Upwelling And Downwelling

Upwelling and downwelling processes play a critical role in the connectivity between offshore waters and coastal ecosystems, having relevant implications in terms of intense biogeochemical activity and global fisheries production. A variety of in situ and remote-sensing networks were used in concert with the Iberia–Biscay–Ireland (IBI) circulation forecast system, in order to investigate two persistent upwelling and downwelling events that occurred in the Northwestern (NW) Iberian coastal system during summer 2014. Special emphasis was placed on quality-controlled surface currents provided by a high-frequency radar (HFR), since this land-based technology can effectively monitor the upper layer flow over broad coastal areas in near-real time. The low-frequency spatiotemporal response of the ocean was explored in terms of wind-induced currents’ structures and immediacy of reaction. Mean kinetic energy, divergence and vorticity maps were also calculated for upwelling and downwelling favorable events, in order to verify HFR and IBI capabilities, to accurately resolve the prevailing surface circulation features, such as the locus of a persistent upwelling maximum in the vicinity of Cape Finisterre. This integrated approach proved to be well-founded to efficiently portray the three-dimensional characteristics of the NW Iberian coastal upwelling system regardless of few shortcomings detected in IBI performance, such as the misrepresentation of the most energetic surface dynamics or the overestimation of the cooling and warming associated with upwelling and downwelling conditions, respectively. Finally, the variability of the NW Iberian upwelling system was characterized by means of the development of a novel ocean-based coastal upwelling index (UI), constructed from HFR-derived hourly surface current observations (UIHFR). The proposed UIHFR was validated against two traditional UIs for 2014, to assess its credibility. Results suggest that UIHFR was able to adequately categorize and characterize a wealth of summer upwelling and downwelling events of diverse length and strength, paving the way for future investigations of the subsequent biophysical implications.

STRUCTURAL-STRATIGRAPHIC DEVELOPMENT OF THE GIDGEALPA-MERRIMELIA-INNAMINCKA TREND WITH IMPLICATIONS FOR PETROLEUM TRAP STYLES, COOPER BASIN, AUSTRALIA

1993 ◽  
Vol 33 (1) ◽  
pp. 94 ◽  
Author(s):  
S.N. Apak ◽  
W.J. Stuart ◽  
N.M. Lemon
Keyword(s):  
Three Dimensional ◽  
Integrated Approach ◽  
Structural Development ◽  
Geological Time ◽  
Structural Style ◽  
Successful Approach ◽  
Depositional Systems ◽  
Definition Of ◽  
Hydrocarbon Reserves ◽  
Cooper Basin

A successful approach to basin analysis requires the broad-scale reconstruction of the three dimensional depositional systems in relation to concurrent structural development of the basin. The Gidgealpa-Merrimelia-lnnamincka (GMI) Trend is a prominent, asymmetric, mildly compressional anticlinal trend located in the Late Carboniferous to Triassic Cooper Basin. Its northwest flank is controlled by high angle thrust faults which were reactivated repeatedly throughout geological time. The present study addresses both the structural style and depositional character of the GMI Trend, focusing on selected areas. It is an integrated approach utilising wire-line logs, seismic interpretation, isopach and structural maps and detailed palynology. This approach has produced a detailed chronostratigraphic subdivision of the Permo-Triassic sequence, particularly the Patchawarra Formation, which points to evidence of synsedimentary tectonics. Evidence from crestal unconformities suggests that the GMI Trend was uplifted during at least four distinct structural episodes. These phases of uplift result from the rejuvenation of pre-Permian faults. Regional investigation of chronostratigraphic units incorporating palynological information, clearly demonstrates the palaeogeography and the presence of internal unconformities within the Patchawarra Formation. Subsurface distribution of hydrocarbon pools and improved definition of areas of prospectivity relate to the episodic uplifts. Although known hydrocarbon reserves have largely accumulated in structural traps, additional potential exploration targets in the Permian sequence exist in stratigraphic, combination, pinchout and downflank fault traps as well as onlap plays along the mid flank areas of the GMI Trend.

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