A5061389665- Hydrology and Sediment Transport Processes
- Geological formations and processes
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Coastal and Marine Dynamics
- Geological and Geophysical Studies
- Tropical and Extratropical Cyclones Research
- Reservoir Engineering and Simulation Methods
- Geology and Paleoclimatology Research
- Coastal wetland ecosystem dynamics
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Astro and Planetary Science
- Solidification and crystal growth phenomena
- Methane Hydrates and Related Phenomena
- Marine and fisheries research
- Offshore Engineering and Technologies
- Space Exploration and Technology
- Planetary Science and Exploration
- Theoretical and Computational Physics
- Material Dynamics and Properties
- Oceanographic and Atmospheric Processes
- Oil and Gas Production Techniques
Shell (Netherlands)
2013-2023
Shell (United States)
2017
University of Padua
2006-2013
In the present contribution we focus our attention on long‐term behavior of meandering rivers, a very common pattern in nature. This class dynamical systems is driven by coexistence various intrinsically nonlinear mechanisms which determine possible occurrence two different morphodynamic regimes: subresonant and superresonant regimes. Investigating full range conditions, objectively compare morphologic characteristics exhibited synthetically generated observed planimetric patterns. The...
Abstract Intense turbidity currents occur in the Malaylay Submarine Canyon off northern coast of Mindoro Island Philippines. They start very shallow waters at shelf break and reach deeper where a gas pipeline is located. The was displaced by current 2006 its rock berm damaged another 10 years later. Here we propose that they are triggered near mouth Baco rivers direct sediment resuspension transport to canyon heads typhoon-induced waves currents. We show these unlikely generate hyperpycnal...
Abstract In the present contribution we focus our attention on possible signatures of a chaotic behaviour or self‐organized criticality state triggered in river meandering dynamics by repeated occurrence cutoff processes. The analysis is carried out examining, through some robust nonlinear methodologies inferred from time series analysis, both spatial local curvatures and long‐term channel sinuosity. Temporal distribution inter‐arrivals also investigated. analyzed data have been obtained...
The effective discharge constitutes a key concept in river science and engineering. Notwithstanding many years of studies, full understanding the determinants is still challenged by variety values identified for different catchments. present paper relates observed diversity to underlying heterogeneity flow regimes. An analytic framework proposed, which links ratio (i.e., between mean streamflow) empirical exponent sediment rating curve streamflow variability, resulting from climatic...
Like most media, open channel flows propagate information through waves. When the boundary is fixed, vectors of consist typically surface gravity In less straightforward case channels with cohesionless bed and possibly erodible banks, other types waves arise from nature boundaries ability stream to transport sediments. this paper we restrict our attention important long waves, which can be described by employing shallow water approximation for flow field a quasi‐equilibrium assumption...
The mathematical modeling of the long‐term evolution meandering rivers needs an efficient computation flow field. Indeed, estimate near bank velocity, needed to determine rate at which outer migrates, cannot rely on full numerical solution governing equations when considering river geological time scales. aim present contribution is twofold: determining complete linear response a spatially varying channel axis curvature and width, exploiting ability model describe morphological tendencies...
Abstract High‐resolution bathymetry, seismic reflection, and piston core data from a submarine channel on the western Niger Delta slope demonstrate that thick, coarse‐grained, amalgamated sands in thalweg/axis transition to thin, fine‐grained, bedded muds margin. Radiocarbon ages indicate axis margin deposits are coeval. Core show bed thickness, grain size, deposition rate strongly decrease with increasing height above thalweg and/or distance centerline. A 5 times thickness 1–2 ψ size...
Understanding and predicting reservoir presence characteristics at regional to basin scales is important for evaluating risk uncertainty in hydrocarbon exploration. Simulating distribution within a by stratigraphic forward model enables the integration of available prior information with fundamental geologic processes embedded numerical model. Stratigraphic predictions can be significantly improved calibrating models independent constraints, such as thicknesses from seismic or well data. A...
Abstract Tropical cyclones impose stresses on narrow and shallow continental shelves. The interaction of strong wind- wave-induced currents with the local topography near shore gives rise to complex flow sediment transport patterns. Considerable uncertainty remains initiation mechanisms turbidity currents, particularly in coastal oceanic settings subject extreme weather events. Here we use state-of-the-art numerical models investigate implications tropical cyclone-induced circulation...
We develop a one‐dimensional model to describe the dynamics of turbidity current flowing in submarine channels. consider flow as steady state polydisperse suspension accounting for water detrainment from clear water‐turbid interface, spatial variations channel width and sediment lateral overspill levees. Moreover, we account exchange with bed extending deal situations where meets nonerodible bed. Results show that when is accounted for, thickness becomes approximately constant proceeding...
Abstract A novel reduced-complexity approach to 3D forward modeling of siliciclastic stratigraphy is presented for the simulation erosion, transport, and sedimentation in continental, transitional, marine depositional domains. The numerical model based on defining centerlines that connect sediment input points shoreline. For each centerline, erosional surfaces bound domains, sand mud proportions are assigned domain. position surface follows a set geologic rules ensures mass balance with...
High-resolution bathymetry, seismic reflection, and piston core data from a submarine channel on the western Niger Delta slope demonstrate that thick, coarse-grained, amalgamated sands in thalweg/axis transition to thin, fine-grained, bedded muds margin. Radiocarbon ages indicate axis margin deposits are coeval. Core show bed thickness, grain size, deposition rate strongly decrease with increasing height above thalweg and/or distance centerline. A 5 times thickness 1–2 ψ size evident over 20...