Results 31 to 40 of about 12,498 (209)

Transportational Cyclic Steps Created by Submarine Long-Runout Turbidity Currents

Geosciences, 2022
In recent years, it has become a common understanding among researchers that one of the significant agents for forming a variety of submarine geomorphologies is turbidity currents that travel long distances, so-called long-runout turbidity currents.
Zhuyuan Wu, Norihiro Izumi
doaj   +1 more source

Basal Pressure Variations Induced by a Turbulent Flow Over a Wavy Surface

Frontiers in Physics, 2021
Turbulent flows over wavy surfaces give rise to the formation of ripples, dunes and other natural bedforms. To predict how much sediment these flows transport, research has focused mainly on basal shear stress, which peaks upstream of the highest ...
Philippe Claudin, Michel Louge, Bruno Andreotti   +2 more
doaj   +1 more source

Characteristics and Dynamics of a Large Sub-Tidal Sand Wave Field—Habitat for Pacific Sand Lance (Ammodytes personatus), Salish Sea, Washington, USA

Geosciences, 2017
Deep-water sand wave fields in the San Juan Archipelago of the Salish Sea and Pacific Northwest Washington, USA, have been found to harbor Pacific sand lance (PSL, Ammodytes personatus), a critical forage fish of the region.
H. Gary Greene, David A. Cacchione, Monty A. Hampton   +2 more
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Subaqueous multiscale bedform morphology dynamics in a mountainous macrotidal estuary

Frontiers in Marine Science
Bedforms in macrotidal estuaries and deltas are distinguished from those in rivers and oceans due to the tidally-driven water depth variations and the varying hydrodynamic processes resulting from the interaction between tidal and fluvial flows.
Ruiqing Liu, Ruiqing Liu, Heqin Cheng, Jinfeng Chen, Lizhi Teng, Zhongda Ren, Zhongda Ren, Qian Yang, Heshan Fan, Heshan Fan, Alice Lefebvre   +10 more
doaj   +1 more source

Bedform effect on the bed-load transport rate using a comparison between two bedform (flat and standing bedform)

Periodicals of Engineering and Natural Sciences (PEN), 2020
In this research, the impact of bedform on the bed - load transport rate was studied through experiments. The experiments were conducted on two cases, one when the bedform was flat, and the other when the bedform was standing wave. The arrival time is the time of bed - load reaches a reference surface at the end of the flume.
Ahmed Sami Nasser, Nezar Hassan Mohamed
openaire   +1 more source

Hybrid coastal edges in the Neuquén Basin (Allen Formation, Upper Cretaceous, Argentina) [PDF]

, 2015
The Allen Formation records the first Ingression Atlantic to the Neuquén Basin during the Late Cretaceous. The definition of lithofacies and facies associations interpretation for stratigraphic sections in Paso Córdoba and Salitral Moreno area, Río ...
Armas, María Paula, Sanchez, Maria Lidia   +1 more
core   +1 more source

Experimental bedforms by saline density currents

Brazilian Journal of Geology, 2019
Bedforms are sedimentary features that can be generated on the seafloor by the interaction between density currents and mobile beds. Developing knowledge about the hydraulic and sedimentary processes involved during these events is in the interest of ...
Débora Koller, Rafael Manica, Ana de Oliveira Borges, Juan Fedele   +3 more
doaj   +1 more source

Ice-flow perturbation analysis: a method to estimate ice-sheet bed topography and conditions from surface datasets

Journal of Glaciology, 2023
One of the largest contributors to uncertainty in predictions of sea-level rise from ice-sheet models is a lack of knowledge about the bed topography beneath ice sheets.
Helen Ockenden, Robert G Bingham, Andrew Curtis, Daniel Goldberg   +3 more
doaj   +1 more source

On modeling the variability of bedform dimensions [PDF]

, 2005
: Bedforms are irregular features that cannot easily be described by mean values. The variations in the geometric dimensions affect the bed roughness, and they are important in the modeling of vertical sorting and in modeling the thickness of cross ...
Blom, A., Hulscher, S.J.M.H., Leclair, S.F., Mark, C.F. van der, Mohrig, D.   +4 more
core   +2 more sources

Back-flow ripples in troughs downstream of unit bars: Formation, preservation and value for interpreting flow conditions [PDF]

, 2015
Back-flow ripples are bedforms created within the lee-side eddy of a larger bedform with migration directions opposed or oblique to that of the host bedform.
Allen J.R.L., Allen J.R.L., Allen J.R.L., Allen J.R.L., Best J., Boersma J.R., De Mowbray T., Gradzinski R., Gustavson T.C., Harms J.C., Hunter R.E., Jopling A.V., Jopling A.V., Martinius A.W., McCabe P.J., Nezu I., Reesink A.J.H., Tillman R.W., Van den Berg J.H., Yalin M.S.   +19 more
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