Log in

Relevant bibliographies by topics / Sediment Gravity Flows

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Sediment Gravity Flows'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Sediment Gravity Flows.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Sediment Gravity Flows"

1

Craig, Melissa J., Jaco H. Baas, Kathryn J. Amos, et al. "Biomediation of submarine sediment gravity flow dynamics." Geology 48, no. 1 (2019): 72–76. http://dx.doi.org/10.1130/g46837.1.

Full text

Abstract:

Abstract Sediment gravity flows are the primary process by which sediment and organic carbon are transported from the continental margin to the deep ocean. Up to 40% of the total marine organic carbon pool is represented by cohesive extracellular polymeric substances (EPS) produced by microorganisms. The effect of these polymers on sediment gravity flows has not been investigated, despite the economic and societal importance of these flows. We present the first EPS concentrations measured in deep-sea sediment, combined with novel laboratory data that offer insights into the modulation of the dynamics of clay-laden, physically cohesive sediment gravity flows by biological cohesion. We show that EPS can profoundly affect the character, evolution, and runout of sediment gravity flows and are as prevalent in deep oceans as in shallow seas. Transitional and laminar plug flows are more susceptible to EPS-induced changes in flow properties than turbulent flows. At relatively low concentrations, EPS markedly decrease the head velocity and runout distance of transitional flows. This biological cohesion is greater, per unit weight, than the physical cohesion of cohesive clay and may exert a stronger control on flow behavior. These results significantly improve our understanding of the effects of an unrealized biological component of sediment gravity flows. The implications are wide ranging and may influence predictive models of sediment gravity flows and advance our understanding about the ways in which these flows transport and bury organic carbon globally.

APA, Harvard, Vancouver, ISO, and other styles

2

G, Shanmugam. "Gravity flows: Types, definitions, origins, identification markers, and problems." Journal of The Indian Association of Sedimentologists 37, no. 2 (2020): 61–90. http://dx.doi.org/10.51710/jias.v37i2.117.

Full text

Abstract:

Abstract This review covers 135 years of research on gravity flows since the first reporting of density plumes in the Lake Geneva, Switzerland, by Forel (1885). Six basic types of gravity flows have been identified in subaerial and suaqueous environments. They are: (1) hyperpycnal flows, (2) turbidity currents, (3) debris flows, (4) liquefied/fluidized flows, (5) grain flows, and (6) thermohaline contour currents. The first five types are flows in which the density is caused by sediment in the flow, whereas in the sixth type, the density is caused by variations in temperature and salinity. Although all six types originate initially as downslope gravity flows, only the first five types are truly downslope processes, whereas the sixth type eventually becomes an alongslope process. (1) Hyperpycnal flows are triggered by river floods in which density of incoming river water is greater than the basin water. These flows are confined to proximity of the shoreline. They transport mud, and they do not transport sand into the deep sea. There are no sedimentological criteria yet to identify hyperpycnites in the ancient sedimentary record. (2) A turbidity current is a sediment-gravity flow with Newtonian rheology and turbulent state in which sediment is supported by flow turbulence and from which deposition occurs through suspension settling. Typical turbidity currents can function as truly turbulent suspensions only when their sediment concentration by volume is below 9% or C < 9%. This requirement firmly excludes the existence of 'high-density turbidity currents'. Turbidites are recognized by their distinct normal grading in deep-water deposits. (3) A debris flow (C: 25-100%) is a sediment-gravity flow with plastic rheology and laminar state from which deposition occurs through freezing en masse. The terms debris flow and mass flow are used interchangeably. General characteristics of muddy and sandy debrites are floating clasts, planar clast fabric, inverse grading, etc. Most sandy deep-water deposits are sandy debrites and they comprise important petroleum reservoirs worldwide. (4) A liquefied/fluidized low (>25%) is a sediment-gravity flow in which sediment is supported by upward-moving intergranular fluid. They are commonly triggered by seismicity. Water-escape structures, dish and pillar structures, and SSDS are common. (5) A grain flow (C: 50-100%) is a sediment-gravity flow in which grains are supported by dispersive pressure caused by grain collision. These flows are common on the slip face of aeolian dunes. Massive sand and inverse grading are potential identification markers. (6) Thermohaline contour currents originate in the Antarctic region due to shelf freezing and the related increase in the density of cold saline (i.e., thermohaline) water. Although they begin their journey as downslope gravity flows, they eventually flow alongslope as contour currents. Hybridites are deposits that result from intersection of downslope gravity flows and alongslope contour currents. Hybridites mimic the "Bouma Sequence" with traction structures (Tb and Tc). Facies models of hyperpycnites, turbidites, and contourites are obsolete. Of the six types of density flows, hyperpycnal flows and their deposits are the least understood.

APA, Harvard, Vancouver, ISO, and other styles

3

EGASHIRA, Shinji. "Mechanics of Sediment Transport and Sediment Laden Flows. 2. Sediment Gravity Flow." JAPANESE JOURNAL OF MULTIPHASE FLOW 11, no. 3 (1997): 258–62. http://dx.doi.org/10.3811/jjmf.11.258.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Johnson, Ronald, Justin Birdwell, and Tracey Mercier. "Controls on organic matter distributions in Eocene Lake Uinta, Utah and Colorado." Mountain Geologist 55, no. 4 (2018): 177–216. http://dx.doi.org/10.31582/rmag.mg.55.4.177.

Full text

Abstract:

The Green River Formation deposited in Eocene Lake Uinta in the Uinta and Piceance Basins, Utah and Colorado, contains the largest oil shale resource in the world with an estimated 1.53 trillion barrels of oil in place in the Piceance Basin and 1.32 trillion barrels in the Uinta Basin. The Douglas Creek arch, a slowly subsiding hinge-line between the two basins, created separate deep depocenters, one in each basin with shallow water conditions near the crest of the arch. Lake Uinta was a saline lake throughout its history with a lower saline to hypersaline layer (monimolimnion) and an upper less saline layer (mixolimnion). Most of the organic matter in the Green River Formation was derived primarily from algae that lived in the photic zone of the lake and is very hydrogen-rich and oil-prone. In many modern large and deep lakes, rates of organic matter production are highly variable due to differences in nutrient supply. However, cyclonic circulation often leads to winnowing out of organic and mineral matter in the mixolimnion leading to organic matter and fine-grained mineral matter being deposited in increasing amounts toward hydro-dynamically dead zones in the center of the circulation producing concentric bands of increasing organic matter content. Organic matter transport through the dense, hypersaline monimolimnion may have been facilitated by low density organic matter attaching to more dense clay mineral particles. Most of the oil shale intervals deposited in Lake Uinta display similar patterns in their organic matter distributions, increasing in very regular fashion toward the central areas of the lake’s two depocenters. This concentric feature is particularly prominent in the most laminated oil shale zones. Here, we propose that cyclonic circulation was present in Lake Uinta. Each basin appears to have had its own circulation currents, separated by shallow water conditions near the Douglas Creek arch, and one hydrodynamically dead zone in each basin. Sediment gravity flow processes were also very active in some strata of Lake Uinta, leading to the reworking and re-depositing of sediments. Two general types of sediment gravity flows are recognized: (1) organic-rich sediment gravity flows that reworked and may have concentrated organic-rich material closer to the two deep depocenters, and (2) sandstone- and siltstone-rich organic-poor mass movement deposits that originated on marginal shelves. Mass movements could have been triggered by various natural processes and/or possibly by the movement of dense brines that evolved on marginal shelves and moved along the bottom of the water column toward the deep part of the lake. The uppermost, poorly consolidated sediment layer was incorporated in sediment gravity flows as they moved, and in many cases sediment gravity flows scoured down significantly into the more consolidated underlying sediment producing large rip-up clasts of laminated sediments. Truncation of more than 100 ft occurs at the base of a sequence of sediment gravity flows in one well, indicating a significant incised channel. Coarser-grained sediment gravity flows terminated before reaching the lake’s deepest areas, forming thick concentric buildups of organically lean sediment near the base of the marginal slopes. Intervals dominated by organic-rich fine-grained sediment gravity flows have tightly concentric bands of increasing organic matter toward the deepest parts of the lake and can be organically richer than the richest laminated intervals. There is some evidence that the hydrodynamically quiet zones did not always correspond closely to the deepest areas of the lake, extending in some cases into some shallower areas.

APA, Harvard, Vancouver, ISO, and other styles

5

Johnson, H. Paul, Joan S. Gomberg, Susan L. Hautala, and Marie S. Salmi. "Sediment gravity flows triggered by remotely generated earthquake waves." Journal of Geophysical Research: Solid Earth 122, no. 6 (2017): 4584–600. http://dx.doi.org/10.1002/2016jb013689.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Yang, Renchao, A. J. (Tom) van Loon, Wei Yin, Aiping Fan, and Zuozhen Han. "Soft-sediment deformation structures in cores from lacustrine slurry deposits of the Late Triassic Yanchang Fm. (central China)." Geologos 22, no. 3 (2016): 201–11. http://dx.doi.org/10.1515/logos-2016-0021.

Full text

Abstract:

Abstract The fine-grained autochthonous sedimentation in the deep part of a Late Triassic lake was frequently interrupted by gravity-induced mass flows. Some of these mass flows were so rich in water that they must have represented slurries. This can be deduced from the soft-sediment deformation structures that abound in cores from these lacustrine deposits which constitute the Yanchang Fm., which is present in the Ordos Basin (central China). The flows and the resulting SSDS were probably triggered by earthquakes, volcanic eruptions, shear stress of gravity flows, and/or the sudden release of overburden-induced excess pore-fluid pressure. The tectonically active setting, the depositional slope and the high sedimentation rate facilitated the development of soft-sediment deformations, which consist mainly of load casts and associated structures such as pseudonodules and flame structures. Sediments with such deformations were occasionally eroded by slurries and became embedded in their deposits.

APA, Harvard, Vancouver, ISO, and other styles

7

Smith, Everett, Max S. Daniller-Varghese, Paul M. Myrow, and David Mohrig. "Experimental Investigations of Combined Flow Sediment Transport." Journal of Sedimentary Research 89, no. 8 (2019): 808–14. http://dx.doi.org/10.2110/jsr.2019.43.

Full text

Abstract:

Abstract In shallow marine environments gravity-driven currents (e.g., hyperpycnal flows) often traverse surface wave fields, and the resulting complex flows are key mechanisms for offshore sediment transport. Our laboratory experiments illustrate how surface waves alter sediment transport in gravity-driven density currents. The addition of a wave field to a gravity-driven current resulted in a 7–8.5% increase in the downslope transport of the deposit volume. Additionally, oscillatory velocities recorded at downslope locations in surface-wave-altered turbidity currents were larger than wave-field velocities measured at the same location without a turbidity current. These observations indicate that surface waves alter turbidity currents in a longitudinally complex manner whereby the influence of oscillatory currents is transported downslope within the body of the turbidity current. These effects were observed in a conservative case: the maximum orbital velocities of the wave field were an order of magnitude less than the maximum unidirectional velocities of the current. We predict that if the velocities of the wave field and the current were sub-equal, a plausible scenario for hyperpycnal flows in near-shore, deltaic, and proximal shelf environments, these effects would be substantially more effective. This work has significant implications for modeling offshore sediment transport in shallow marine environments and for interpreting the deposits of such flows, most notably that the presence or absence of combined-flow ripples might not indicate whether the current was deposited above or beneath wave base.

APA, Harvard, Vancouver, ISO, and other styles

8

Weirich, Frank H. "Field evidence for hydraulic jumps in subaqueous sediment gravity flows." Nature 332, no. 6165 (1988): 626–29. http://dx.doi.org/10.1038/332626a0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Baas, Jaco H. "Sediment gravity flows: Recent advances in process and field analysis—introduction." Sedimentary Geology 179, no. 1-2 (2005): 1–3. http://dx.doi.org/10.1016/j.sedgeo.2005.05.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sassa, Shinji, and Hideo Sekiguchi. "Liqsedflow: Role of Two-Phase Physics in Subaqueous Sediment Gravity Flows." Soils and Foundations 50, no. 4 (2010): 495–504. http://dx.doi.org/10.3208/sandf.50.495.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Sediment Gravity Flows"

1

Oakeshott, Jane Margaret d'Ivry. "Aspects of depositional mechanisms of high concentration sediment gravity flows." Thesis, Keele University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279875.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Amiruddin. "The dynamics of subaqueous sediment gravity flows and redepositional processes." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144399.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ohata, Koji. "Formation conditions of bedforms under sediment-laden gravity currents." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263478.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Hodson, James Michael. "Biogenic grain transport in sediment gravity flows : sediment redistribution on carbonate piatiorms ana tne lormation or calciturbidites." Thesis, University of East Anglia, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520430.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Scully, Malcolm E. "Modeling of Critically-Stratified Gravity Flows: Application to the Eel River Continental Shelf, Northern California." W&M ScholarWorks, 2001. http://www.vims.edu/physical/projects/CHSD/publications/reports/S2001%5FMS.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Murphy, Amanda Jane. "Sediment heterogeneity and sand production in gas hydrate extraction, Daini-Atsumi Knoll, Nankai Trough, Japan." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/283623.

Full text

Abstract:

The possibility of commercial natural gas production from gas hydrates has been tested by researchers and industry for more than ten years. Depressurisation of gas hydrates in porous and permeable sandstones has successfully produced water and natural gas. However long term sustainable production is still elusive. Catastrophic sand production into the wellbore has terminated at least three of the significant depressurisation trials including the 2013 trial at the Daini-Atsumi knoll, Nankai Trough, offshore Japan. Sand production is generally thought to be the result of mechanical and hydrodynamic instability, however it appears the failure mechanism is not the same for all reservoirs and the location of reservoir porosity and pressure on the normal compression line for sands could be a controlling factor. Sand production in reservoirs at shallow depths and low confining stresses (less than 10 MPa) are likely to be influenced by fluid flow effects like those described by the Shields (1936) diagram. The relative density of the formation may also affect the nature of the sand production in these reservoirs. The Daini-Atsumi knoll is a structural high on the outer ridge of the Kumano forearc basin, offshore Japan. Hydrate saturations of 50 to 80 % occur within three geological units of the Middle Pleistocene Ogasa group. This group is made up of deep water sediments including sediment gravity flow deposits distinguished by alternating silt and sand layers. The presence of these alternating layers could have influenced the sand production seen during the trial. This reservoir heterogeneity at the 2013 Daini-Atsumi knoll gas hydrate production trial site was characterised using the descriptions of geological units, analogues and statistical techniques. Scenarios of this heterogeneity were tested in a high pressure plane-strain sand production apparatus. The results of these tests suggest the boundary shear stress of the fluid on the grains is a significant control on sand production for the Daini-Atsumi Knoll reservoir and the layering and grainsize structure of the sediments encourages sand production. Relative density of the sediments appears to impact the nature of the sand production where denser sediments show more localised movement. These results indicate that even minor weaknesses in sand control devices will result in uncontrollable sand production rates from the Daini-Atsumi Knoll gas hydrate reservoir. Managing the fluid flow rate in the reservoir and selectively completing coarser grained zones at the base of sand layers could help limit sand production in future trials.

APA, Harvard, Vancouver, ISO, and other styles

7

McConnico, Tim. "The terraces of the Conway Coast, North Canterbury: Geomorphology, sedimentary facies and sequence stratigraphy." Thesis, University of Canterbury. Geological Sciences, 2012. http://hdl.handle.net/10092/7373.

Full text

Abstract:

A basin analysis was conducted at the Conway Flat coast (Marlborough Fault Zone, South Island, New Zealand) to investigate the interaction of regional and local structure in a transpressional plate boundary and its control on basin formation. A multi-tiered approach has been employed involving: (i) detailed analysis of sedimentary deposits; (ii) geomorphic mapping of terraces, fault traces and lineaments; (iii) dating of deposits by 14C and OSL and (iv) the integration of data to form a basin-synthesis in a sequence stratigraphy framework. A complex thrust fault zone (the Hawkswood Thrust Fault Zone), originating at the hinge of the thrust-cored Hawkswood anticline, is interpreted to be a result of west-dipping thrust faults joining at depth with the Hundalee Fault and propagating eastwards. The faults uplift and dissect alluvial fans to form terraces along the Conway Flat coast that provide the necessary relief to form the fan deltas. These terrace/fan surfaces are ~9 km long and ~3 km wide, composite features, with their upper parts representing sub-aerial alluvial fans. These grade into delta plains of Quaternary Gilbert-style fan deltas. Uplift and incision have created excellent 3D views of the underlying Gilbert-style fan delta complexes from topsets to prodelta deposits. Erosive contacts between the Medina, Rafa, Ngaroma and modern Conway fan delta deposits, coupled with changes in terrace elevations allow an understanding of the development of multiple inset terraces along the Conway Flat coast. These terraces are divided into five stages of evolution based on variations in sedimentary facies and geomorphic mapping: Stage I involves the uplift of the Hawkswood Range and subsequent increased sedimentation rate such that alluvial fans prograded to the sea to form the Medina fan delta Terrace. Stage II began with a period of incision, from lowering sea level or changes in the uplift and sedimentation rate and continued with the deposition of the Dawn and Upham fan deltas. Stage III starts with the incision of the Rafa Terrace and deposition of aggradational terraces in the upper reaches. Stage IV initiated by a period of incision followed by deposition of estuarine facies at ~8ka and Stage V began with a period of incision and continues today with the infilling of the incised valley by the modern fan delta of the Conway River and its continued progradation. New dates from within the Gilbert-type fan deltas along the Conway Flat coast are presented, using OSL and 14C dating techniques. Faulting at the Conway Flat coast began ~ 94 ka, based on the development of the Medina Terrace fan delta with uplift rates ~1.38~1.42 m/ka. The interplay of tectonics and sea level fluctuations continued as the ~79 ka Rafa Terrace fan deltas were created, with uplift rates calculated at ~1.39 m/ka. Detailed 14C ages from paleoforest (~8.4-~6.4 ka) in the Ngaroma Terrace and from the mouths of smaller streams have established uplift rates during the Holocene ~1-3 m/ka, depending on sea level.

APA, Harvard, Vancouver, ISO, and other styles

8

Clyne, Elisabeth Rose. "Assessment of the High-Resolution Sediment Gravity Flow Record in Prince William Sound, Alaska." W&M ScholarWorks, 2017. https://scholarworks.wm.edu/etd/1516639590.

Full text

Abstract:

South-Central Alaska is one of the most seismically active and climatologically sensitive places in the world. Within this region, Prince William Sound (PWS) receives abundant sediment from multiple sources, potentially housing a high-resolution environmental record spanning the past 4,000 years. Inputs to PWS are derived from local rivers and glaciers, and may include earthquake- and glacial-outburst-triggered sediment gravity flows. Therefore, this is an ideal location to investigate the long-term record of seismic, glacial, and riverine activity. This study examines the elemental, grain size, and stable isotope signatures in PWS to identify gravity flow deposits and the potential paleoseismic and paleoclimate record. Previous sediment core studies have focused on central and southern PWS, and this study fills a knowledge gap on sediment characteristics in northern PWS. Shelf sediments are transported into PWS via Hinchinbrook Inlet during winter storms, and the Copper River plume is advected into PWS during summer months. Local sources in PWS and the Copper River/Shelf sediments in southern PWS have unique signatures of Sr/Pb, Cu/Pb, K/Ca, Rb/Sr, and Rb/Ca. as a result, sediment gravity flows originating from different locations have distinct provenance signatures and can be distinguished from locally emplaced sediment. Six cores in central and northern PWS were collected and sedimentation rates were determined by 210Pb, 137Cs, and 239,240Pu geochronology. The cores were assessed for elemental content and grain size patterns to identify gravity flow deposits. Deposits, sedimentation rates, and provenance were correlated with five previously collected cores in southern and central PWS. The stable isotopic content of 13C and 15N were assessed across all eleven cores. The sedimentation rates, mean grain size, Sr/Pb and Cu/Pb all decrease moving northward through PWS, and sediments derived in northern PWS have the lowest Sr/Pb, Cu/Pb, δ13C, δ15N, and C/N and highest K/Ca, Rb/Sr, and Rb/Ca values observed. This trend is due to decreasing influence from the Copper River and shelf sediments in the south and increasing influence of local PWS sources in the north. Using these distinct provenances, several earthquake deposits were identified. Earthquakes of magnitudes 6.0 < Mw < 7.0 produced deposits in the central channel, and those of Mw ≥ 7.0 with epicenters in PWS had distinctly mixed signatures from generating numerous flows throughout the region. We also identified a flow sourced near the Columbia Glacier region which may have derived from earthquake activity or the glacier’s rapid retreat. Based on spatial analysis of the eleven gravity cores, the most robust gravity flow records are captured within deep ponded sediment basins and the area spanning the southern end of the channel to the northern ponded sediment basin.

APA, Harvard, Vancouver, ISO, and other styles

9

Rocheleau, Jonathan. "Depositional Architecture of a Near-Slope Turbidite Succession: Upper Kaza Group, Windermere Supergroup, Castle Creek, British Columbia, Canada." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20122.

Full text

Abstract:

An expansive panel of well exposed (periglacial) strata of the Upper Kaza Group permitted a detailed study of the stratal architecture of proximal basin floor deposits in the Neoproterozoic Windermere turbidite system. Detailed stratigraphic and petrographic analyses identified six lithofacies: poorly-sorted, clast-rich mudstone (F1), thin-bedded siltstone and mudstone (F2), thick-bedded, massive sandstone (F3), medium-scale, cross-stratified sandstone (F4), mudstone-clast breccia (F5), and medium-bedded turbidites (F6). The spatial distribution of these facies identify five architectural elements: heterolithic feeder channel deposits (FA1), thin-bedded intralobe turbidites (FA2), terminal splay deposits (FA3), distributary channel deposits (FA4), and isolated scours (FA5). FA 1-4 are genetically related and form the basic building blocks of large-scale basin floor depositional lobes. FA 5, which is isolated to the stratigraphic top of the study area, is interpreted to have formed in a base-of-slope setting, and its superposition on FA 1-4 suggests the long-term progradation of the Windermere turbidite system.

APA, Harvard, Vancouver, ISO, and other styles

10

Fiorot, Guilherme Henrique. "On unsteady open-channel flows : a contribution to nonstationary sediment transport in runoff flows and to unstable non-Newtonian mudflow studies." Thesis, Rennes, INSA, 2016. http://www.theses.fr/2016ISAR0020/document.

Full text

Abstract:

L'objectif général de cette thèse est l'étude de d'écoulement instationnaire du type coulée de boue dans des canaux naturels. La pluie, source du débit liquide, entraine le ruissellement, responsable du mouillage du sol, de la réduction de sa cohésion et de l'érosion des petites particules de sédiments. A partir de là, le transport de sédiments peut augmenter avec le débit et la pente du sol jusqu'à ce que la concentration en particules atteignent des niveau très importants dans la composition du fluide. Dans une première partie, un banc expérimental a été conçu pour simuler des écoulements ruissellants sur un lit mobile. Un système de mesure a été inventé et implémenté pour mesurer le débit solide instantané et le frottement instantané. Ces systèmes sont utilisés pour étudier l'effet des ondes de surface libre sur le transport de sédiments. Ces données sont employées pour corréler les charactéristiques entr l'écoulement et le transport solide. L'analyse des résultats permet d'observer que pour un écoulement moyen donné, la présence des ondes réduit la quantité moyenne des sédiments transportés. Dans une deuxième partie, la dynamique des écoulements très concentrés est étudiée grâce à un modèle de roll waves de première ordre pour les écoulements laminaires des fluides de type Herschel-Bulkley. Les résultats présentés indiquent que des roll wave sont certainement présentes dans un événement naturel publié et pris comme cas d'étude. Les propriétés des ondes prédites sont estimées avec un écart de 8% par rapport à l'amplitude moyenne mesurée. Finalement, la solution théorique pour le profil de vitesse est modifiée pour prendre en considération l'effet de la porosité. La solution mathématique est comparée à des simulations faites avec FLUENT. Une analyse paramétrique est effectuée, et la comparaison avec le cas d'étude déjà publié est améliorée. En conclusion générale, les phénomènes instationnaires qui peuvent apparaitre lors de l'évolution d'une coulée de boue affectent la dynamique générale du système couplé (écoulement-transport sédimentaire) par rapport au cas permanent et uniforme. Vérifier que ce type de phénomènes peut apparaître lors d'un événement naturel comme les coulées de boue doit être un étape importante d'un projet d'ingénierie, afin de limiter les risques de dommages<br>This thesis was motivated by the need to better understand time-dependent features related to mudflow evolution on natural sloped channels. Basically, the research is focused on events that are confined in channels formed due to the topography. The rain, source of the liquid discharge, generates the runoff flow which is responsible for wetting the soil surface, promoting reduction of soil cohesiveness and erosion of small particles such as clay and sand. From this point, the sediment transport can increase as small water flows merge and form greater streams. The scenario keeps its evolution until i reaches high concentration of particles in the fluid mixture. In the first part, to study the non-permanent feature of sediment transport, an open-channel experiment was designed for simulating runoff flow over a mobile bed. A measurement system was designed and constructed to instantaneously inspect the solid discharge of particles and the flow friction at the bed. This apparatus is further used to explore the influence of free-surface waves on the sediment transport. Hydraulic properties of flows are qualitatively and quantitatively studied and data are used to correlate characteristics of flow and sediment transport. A set of experimental runs is presented and explored. Analysis of results shows that for fixed flow conditions, waves induce an overall smaller quantity of transported sediment. In a second part, the dynamics of high concentrated flows is addressed and this thesis attempts to appl a first-order roll-wave model for Herschel-Bulkley laminar fluid flow to a registered natural event. Results presented point out that roll waves could have occurred during this already published case-study event. Simulations could predict wave heights within 8% on uncertainty with respect to the mea amplitude of measured waves. Finally a new theoretical solution for the velocity profile is proposed taking into account the porosity of the bed. Results are then compared with numerical simulation performed in FLUENT. A parametric analysis is employed and the case-study is once again evaluated. A: general conclusion, the non-permanent phenomena that can appear during the evolution of a mudflow event affect the overall dynamics of the coupled system (hydraulic-sediment transport) in comparison to the steady and uniform case. Verifying that such phenomena could appear should indeed be an important part in hydraulic engineering projects, especially when dealing with lives, which is the case of mud flows

APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Sediment Gravity Flows"

1

Akiyama, Juchiro. Gravity currents in lakes, reservoirs and coastal regions: Two- layer stratified flow analysis. St. Anthony Falls Hydraulic Laboratory, University of Minnesota, 1987.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Bridges, John C. Evolution of the Martian Crust. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190647926.013.18.

Full text

Abstract:

This is an advance summary of a forthcoming article in the Oxford Encyclopedia of Planetary Science. Please check back later for the full article.Mars, which has a tenth of the mass of Earth, has cooled as a single lithospheric plate. Current topography gravity maps and magnetic maps do not show signs of the plate tectonics processes that have shaped the Earth’s surface. Instead, Mars has been shaped by the effects of meteorite bombardment, igneous activity, and sedimentary—including aqueous—processes. Mars also contains enormous igneous centers—Tharsis and Elysium, with other shield volcanoes in the ancient highlands. In fact, the planet has been volcanically active for nearly all of its 4.5 Gyr history, and crater counts in the Northern Lowlands suggest that may have extended to within the last tens of millions of years. Our knowledge of the composition of the igneous rocks on Mars is informed by over 100 Martian meteorites and the results from landers and orbiters. These show dominantly tholeiitic basaltic compositions derived by melting of a relatively K, Fe-rich mantle compared to that of the Earth. However, recent meteorite and lander results reveal considerable diversity, including more silica-rich and alkaline igneous activity. These show the importance of a range of processes including crystal fractionation, partial melting, and possibly mantle metasomatism and crustal contamination of magmas. The figures and plots of compositional data from meteorites and landers show the range of compositions with comparisons to other planetary basalts (Earth, Moon, Venus). A notable feature of Martian igneous rocks is the apparent absence of amphibole. This is one of the clues that the Martian mantle had a very low water content when compared to that of Earth.The Martian crust, however, has undergone hydrothermal alteration, with impact as an important heat source. This is shown by SNC analyses of secondary minerals and Near Infra-Red analyses from orbit. The associated water may be endogenous.Our view of the Martian crust has changed since Viking landers touched down on the planet in 1976: from one almost entirely dominated by basaltic flows to one where much of the ancient highlands, particularly in ancient craters, is covered by km deep sedimentary deposits that record changing environmental conditions from ancient to recent Mars. The composition of these sediments—including, notably, the MSL Curiosity Rover results—reveal an ancient Mars where physical weathering of basaltic and fractionated igneous source material has dominated over extensive chemical weathering.

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Sediment Gravity Flows"

1

Syvitski, J. P. M., and E. W. H. Hutton. "Failure of Marine Deposits and their Redistribution by Sediment Gravity Flows." In Landslide Tsunamis: Recent Findings and Research Directions. Birkhäuser Basel, 2003. http://dx.doi.org/10.1007/978-3-0348-7995-8_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Postma, George. "Sediment Gravity Flow." In Encyclopedia of Earth Sciences Series. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-2642-2_476.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Shanmugam, G. "Soft-sediment deformation structures." In Mass Transport, Gravity Flows, and Bottom Currents. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-822576-9.00009-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Manica, Rafael. "Sediment Gravity Flows: Study Based on Experimental Simulations." In Hydrodynamics - Natural Water Bodies. InTech, 2012. http://dx.doi.org/10.5772/28794.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

"The LIQSEDFLOW: Role of two-phase physics in subaqueous sediment gravity flows." In Prediction and Simulation Methods for Geohazard Mitigation. CRC Press, 2009. http://dx.doi.org/10.1201/noe0415804820-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Davison, Ian. "Bathymetric Control on Paleocene Gravity Flows Around Salt Domes in the Central Graben, North Sea." In Salt Sediment Interactions and Hydrocarbon Prospectivity: Concepts, Applications, and Case Studies for the 21st Century: 24th Annual. SOCIETY OF ECONOMIC PALEONTOLOGISTS AND MINERALOGISTS, 2004. http://dx.doi.org/10.5724/gcs.04.24.1031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Ponce, J. J., E. B. Olivero, D. R. Martinioni, and M. I. López Cabrera. "Sustained and Episodic Gravity-Flow Deposits and Related Bioturbation Patterns in Paleogene Turbidites (Tierra Del Fuego, Argentina)." In Sediment–Organism InteractionsA Multifaceted Ichnology. SEPM Society for Sedimentary Geology, 2007. http://dx.doi.org/10.2110/pec.07.88.0253.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Haughton, Peter D. W., William D. McCaffrey, C. Davis, and Simon P. Barker. "Sediment Gravity Flow Deposits and Bed-Scale Heterogeneity—Lessons from North Sea Fields." In Answering the Challenges of Production from Deep-Water Reservoirs: Analogues and Case Histories to aid a New Generation: 28th Annual. SOCIETY OF ECONOMIC PALEONTOLOGISTS AND MINERALOGISTS, 2008. http://dx.doi.org/10.5724/gcs.08.28.0407.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Masuda, F., and H. Naruse. "Internal structure of massive division in sediment gravity flow deposits visualized by grain fabric mapping." In River, Coastal and Estuarine Morphodynamics. Taylor & Francis, 2006. http://dx.doi.org/10.1201/9781439833896.ch62.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Bohor, Bruce F. "A sediment gravity flow hypothesis for siliciclastic units at the K/T boundary, northeastern Mexico." In The Cretaceous-Tertiary Event and Other Catastrophes in Earth History. Geological Society of America, 1996. http://dx.doi.org/10.1130/0-8137-2307-8.183.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Sediment Gravity Flows"

1

Amiruddin, Hideo Sekiguchi, and Shinji Sassa. "The Dynamics of Sediment Gravity Flows Following Fluidization." In Second Japan-U.S. Workshop on Testing, Modeling, and Simulation in Geomechanics. American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40870(216)33.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Harazim, Dario, Kathryn C. Denommee, Samuel J. Bentley, and Joe Macquaker. "SEDIMENTOLOGICAL RECOGNITION CRITERIA FOR CURRENT-WAVE-ENHANCED SEDIMENT GRAVITY FLOWS (CWESGFS)." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-307607.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Wolak, Jeannette M., Larry W. Knox, Jason Gentry, Austyn Allen, and Gabrielle Miller. "CALCICLASTIC SEDIMENT GRAVITY FLOWS: LESSONS LEARNED FROM OUTCROPS OF THE MISSISSIPPIAN FORT PAYNE FORMATION." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-323134.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Chowdhury, M. R., and F. Y. Testik. "Subaqueous Cohesive Sediment Gravity Flows from Open Water Pipeline Dredge Disposal: Laboratory Experiments and Mathematical Modeling." In Conference on Coastal Engineering Practice 2011. American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41190(422)38.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Zhao, Xu, Liang Cheng, Ming Zhao, Hongwei An, and Wei He. "Gravity Anchors Astride Subsea Pipelines Subject to Oscillatory and Combined Steady and Oscillatory Flows." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83247.

Full text

Abstract:

This writing presents results of simulating oscillatory and combined steady and oscillatory flows past gravity anchors astride subsea pipelines. It can be considered a companion to a previous numerical study on steady currents past gravity anchors. The gravity anchor system comprises large arch-shaped concrete blocks positioned at intervals astride offshore pipelines, and it is engineered to provide innovative and cost-effective secondary stabilisation for high-capacity gas-transporting pipelines serving in severe metocean conditions, e.g. cyclone-prone offshore areas. A free-settling marine object bottom-seated on the seabed, however, the gravity anchor may subside into scour pits around its base due to locally disturbed flow regimes, imposing integrity risks on the pipe. Also, the effect of gravity anchors on hydrodynamic loading on nearby pipeline lengths is of interest. The present study employed a Petrov-Galerkin finite element method to solve the three-dimensional Navier-Stokes equations in direct numerical simulation. Firstly sinusoidal flow oscillating perpendicularly to the pipe beneath gravity anchors on an immobile bed was simulated at a Keulegan-Carpenter number of 10 and a pipe Reynolds number of 1000. Then, a steady current co-directionally superimposed on the aforementioned oscillatory flow was modelled at a ratio of steady current velocity to oscillatory flow velocity amplitude of 1. With sediment transport capacity related to bed shear stresses, the time-averaged bed shear stress amplification around gravity anchors in oscillatory flow was revealed first, and found to be consistent with laboratory observations of scour patterns. The effect of superimposing steady flow onto oscillatory flow on bed shear stress amplification was then explored. Lastly, hydrodynamic forces on pipelines in the vicinity of gravity anchors were gauged. The present work intends to shed light on the initial seabed responses with regard to the scour process around gravity anchors immersed in the oceanic wave boundary layer, as well as the effect of gravity anchors on hydrodynamic loadings on pipelines.

APA, Harvard, Vancouver, ISO, and other styles

6

Brown, Jack, Nathan D. Webb, and James L. Best. "THE MISSISSIPPIAN CARPER SANDSTONE OF THE ILLINOIS BASIN: REINTERPRETATION OF SEDIMENT GRAVITY FLOWS AND IMPLICATIONS FOR RESERVOIR QUALITY." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-356228.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Osukuku, Godfred, Abiud Masinde, Bernard Adero, Edmond Wanjala, and John Ego. "Integrated Geophysical Interpretation of Kerio Valley Basin Stratigraphy, Kenya Rift." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2670415-ms.

Full text

Abstract:

Abstract This research work attempts to map out the stratigraphic sequence of the Kerio Valley Basin using magnetic, gravity and seismic data sets. Regional gravity data consisting of isotactic, free-air and Bouguer anomaly grids were obtained from the International Gravity Bureau (BGI). Magnetic data sets were sourced from the Earth Magnetic Anomaly grid (EMAG2). The seismic reflection data was acquired in 1989 using a vibrating source shot into inline geophones. Gravity Isostacy data shows low gravity anomalies that depict a deeper basement. Magnetic tilt and seismic profiles show sediment thickness of 2.5-3.5 Km above the basement. The Kerio Valley Basin towards the western side is underlain by a deeper basement which are overlain by succession of sandstones/shales and volcanoes. At the very top are the mid Miocene phonolites (Uasin Gishu) underlain by mid Miocene sandstones/shales (Tambach Formation). There are high gravity anomalies in the western and southern parts of the basin with the sedimentation being constrained by two normal faults. The Kerio Valley Basin is bounded to the west by the North-South easterly dipping fault system. Gravity data was significantly of help in delineating the basement, scanning the lithosphere and the upper mantle according to the relative densities. The basement rocks as well as the upper cover of volcanoes have distinctively higher densities than the infilled sedimentary sections within the basin. From the seismic profiles, the frequency of the shaley rocks and compact sandstones increases with depths. The western side of the basin is characterized by the absence of reflections and relatively higher frequency content. The termination of reflectors and the westward dip of reflectors represent a fault (Elgeyo fault). The reflectors dip towards the west, marking the basin as an asymmetrical syncline, indicating that the extension was towards the east. The basin floor is characterized by a nearly vertical fault which runs parallel to the Elgeyo fault. The seismic reflectors show marked discontinuities which may be due to lava flows. The deepest reflector shows deep sedimentation in the basin and is in reasonable agreement with basement depths delineated from potential methods (gravity and magnetic). Basement rocks are deeper at the top of the uplift footwall of the Elgeyo Escarpment. The sediments are likely of a thickness of about 800 M which is an interbed of sandstones and shales above the basement.

APA, Harvard, Vancouver, ISO, and other styles

8

Stolz, Dustin J., Evan K. Franseen, and Robert H. Goldstein. "Character of the Avalon Shale (Bone Spring Formation) of the Delaware Basin, West Texas and Southeast New Mexico: Effect of Carbonate-Rich Sediment Gravity Flows." In Unconventional Resources Technology Conference. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/178610-ms.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Stolz, Dustin J., Evan K. Franseen, and Robert H. Goldstein. "Character of the Avalon Shale (Bone Spring Formation) of the Delaware Basin, West Texas and Southeast New Mexico: Effect of Carbonate-rich Sediment Gravity Flows." In Unconventional Resources Technology Conference. American Association of Petroleum Geologists, 2015. http://dx.doi.org/10.15530/urtec-2015-2154681.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

DAS, HIMANGSHU S. "FLOW STRUCTURE OF SUBMARINE GRAVITY FLOW." In International Conference on Coastal Sediments 2019. WORLD SCIENTIFIC, 2019. http://dx.doi.org/10.1142/9789811204487_0181.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!