Three-dimensional model of alluvial stratigraphy; theory and applications

Mackey, Scudder D.; Bridge, J.

doi:10.1306/d42681d5-2b26-11d7-8648000102c1865d

Cited by 335 publications

(339 citation statements)

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“…Physically conceptual models to predict the hydraulic and geomorphic conditions for an avulsion process were developed by many authors (Mackey and Bridge, 1995;Slingerland and Smith, 1998;Barbe et al, 2000;Winer and Raphelt, 2005;Edmonds and Slingerland, 2008;Letter et al, 2008). They showed that the avulsion depends on the main channel to former meander channel bed slopes ratio, the bed grain size, water surface elevation at the bifurcation areas, the diversion angle, etc.…”

Section: Local Control Factors Governing the Distribution Of Flow Energymentioning

confidence: 99%

Contrasted sediment processes and morphological adjustments in three successive cutoff meanders of the Danube delta

Duţu

Provansal

Coz³

et al. 2014

Geomorphology

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Since the 1980s intensive anthropogenic disturbances have affected the channel of the St. George branch, the southern distributary of the Danube River. The meander cutoff program since [1984][1985][1986][1987][1988] induced different hydrosedimentary impacts on the local distribution of river flow velocities, discharge, and sediment fluxes between the former meanders and the man-made canals (Ichim and Radoane, 1986;Popa, 1997;Panin, 2003). This paper selects three large cutoff meander reaches of the St. George branch (the Mahmudia,

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Section: Local Control Factors Governing the Distribution Of Flow Energymentioning

confidence: 99%

Contrasted sediment processes and morphological adjustments in three successive cutoff meanders of the Danube delta

Duţu

Provansal

Coz³

et al. 2014

Geomorphology

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“…Even afterwards, they continued to receive fine sediments, i.e., remained part of the floodable plain (Smith et al, 1989), becoming a fine-particle-size horizon below and above this sandy layer influenced by the avulsion process. Most likely, the locations that had a small sandy layer were close enough to the avulsion point to receive the sediments and far enough away to prevent the formation of a new river channel on its sediments (Smith et al, 1989;Mackey & Bridge, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Based on the discussed evidences, on geomorphological data (Nascimento, 2012) and the literature (Smith et al, 1989;Mackey & Bridge, 1995;Cazanacli & Smith, 1998;Slingerland & Smith, 1998;Farrell, 2001;Törnqvist & Bridge, 2002;Assine, 2003;Nichols & Fisher, 2007;Stouthamer & Berendsen, 2007;Nichols, 2009), an illustrative model can be constructed to define how the fluvial evolution occurred, resulting in the genesis of the soils studied ( Figure 9). …”

Section: Discussionmentioning

confidence: 99%

“…This abandonment may occur due to a process known as avulsion, defined as a shift in the main channel bed of the river to a new course, causing the water course to flow through the former floodplain ( Figure 1) (Mackey & Bridge, 1995;Slingerland & Smith, 1998;Assine, 2003;Stouthamer & Berendsen, 2007). During the avulsion process, firstly the levee of the river is breached and then sandy deposits are formed by the spreading of sediments transported through the channel (crevasse splay deposits) (Törnqvist & Bridge, 2002) (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil

Nascimento

Furquim

Couto

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYThe Pantanal region can be characterized as a quaternary floodplain with predominant sedimentation in the form of alluvial fans. In the geomorphologic and sedimentary evolution, the avulsion process is inherent to this depositional system and its dynamics, together with surface water floods, influence soil sedimentation on this plain. The knowledge and differentiation of these two events can contribute to a better understanding of the variability of soil properties and distribution under the influence of these sedimentation processes. Therefore, this study investigated the genesis of soils in the Northern Pantanal with textural contrasts in deeper horizons and their relationship with the depositional system dynamics. We analyzed four soil profiles in the region of Barão de Melgaço, Mato Grosso State, Brazil (RPPN SESC Pantanal). Two profiles were sampled near the Rio Cuiabá (AP1 and AP4) and two near the Rio São Lourenço (AP10 and AP11). In AP11, the horizons contrast in particle size between the profile basis and the surface. In AP1, AP4 and AP10, the horizons overlaying the sand layer have similar particle size properties, mainly in terms of sand distribution. In the first case, floods (surface water) seem to have originated the horizons and layers with contrasting texture. In the second case, avulsion is the most pronounced process. Therefore, the two modes can form soils with contrasting texture that are discriminable by soil morphology, based on the distinct features associated to the specific sedimentation processes.Index terms: alluvial soils, hydromorphic soils, fluvial deposition system, alluvial fans, avulsion.(

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“…Allen, 1983;Miall, 1985;Bristow, 1996), modelos numéricos (e.g. Leeder, 1978;Allen, 1978;Bridge & Mackey, 1993;Paola et al, 1992;Mackey & Bridge, 1995;Marr et al, 2000;Tal & Paola, 2007;Jerolmack & Paola, 2007;2010), experimentais (e.g. Bryant, 1995;Sheets et al, 2002;Hickson et al, 2005;Kim & Paola, 2007;Paola et al, 2009;Kim et al, 2011;Connel et al, 2012a;, estratigrafia de sequências (e.g.…”

Section: I1 Introduçãomentioning

confidence: 99%

A Formação Marizal (Aptiano) na Bacia do Tucano (BA): contribuições à análise da arquitetura de depósitos fluviais e implicações paleobiogeográficas

Freitas¹

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2014Autorizo a reprodução e divulgação total ou parcial deste trabalho, por qualquer meio convencional ou eletrônico, para fins de estudo e pesquisa, desde que citada a fonte. Emphasis is placed on the distinction between laterally equivalent deposits of channel fill and bars, given the recently recognized difficulty in distinguishing these elements, based on sedimentological data, in active depositional systems. In this way, the study of a selected are of the Banzaê Member enabled, through a quantitative approach considering the scale of architectural elements and cross-sets as well as paleohydraulic constraints, the recognition and individualization of deposits attributed to the fluvial geomorphological dynamics, such as unit bars, abandoned channel fills and channel belt successions bounded by avulsion surfaces.

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Three-dimensional model of alluvial stratigraphy; theory and applications

Cited by 335 publications

References 0 publications

Contrasted sediment processes and morphological adjustments in three successive cutoff meanders of the Danube delta

Contrasted sediment processes and morphological adjustments in three successive cutoff meanders of the Danube delta

Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil

A Formação Marizal (Aptiano) na Bacia do Tucano (BA): contribuições à análise da arquitetura de depósitos fluviais e implicações paleobiogeográficas

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