Floodplain Formation and Sediment Stratigraphy Resulting from Oblique Accretion on the Murrumbidgee River, Australia

Page, Kenneth; Nanson, Gerald C.; Frazier, Paul

doi:10.1306/070102730005

Cited by 104 publications

(86 citation statements)

References 23 publications

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“…Most meandering channels deposit a two-component vertical sequence: a lower, relatively cohesionless sand or gravel bedload and lateral accretion point-bar deposit overlain by finer, cohesive sediment deposited by vertical or oblique accretion Allen, 1970;Bluck, 1971;Jackson, 1978;Nanson, 1980;Miall, 1996;Bridge, 2003;Page et al, 2003). Erosion of channel banks commonly occurs by slumping or toppling because of erosion of the less cohesive and largely unvegetated sediment in the lower part of channel banks from entrainment by river flow or seepage forces from ground water (e.g., Thorne and Tovey (1981), Thorne (1990), Thorne and Abt (1993), Thorne et al (1998a,b), Simon et al (1999), Wood et al (2001), and Simon and Collison (2002)).…”

Section: Quinn River Nevadamentioning

confidence: 99%

River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usuktuk River, AK, and the Quinn River, NV

et al. 2015

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Section: Quinn River Nevadamentioning

confidence: 99%

River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usuktuk River, AK, and the Quinn River, NV

et al. 2015

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“…The floodplain model that modified by (Page et al, 2003) state that there are three models of stratigraphy produced by oblique accretion for different floodplain seetings: floodplain with point bar, floodplain with no point bar and floodplain with point bar and scrolls. Based on the model, this area are include in model of floodplain with point bar (Fig 8).…”

Section: Discussionmentioning

confidence: 99%

“…When the point bars occur, oblique accretion deposit occupy that part of the convex bank directly above at the point bar (Page et al, 2003). At site oblique-accretion layers consist of sand, muddy fine sand strata dipping conformably with bank surface (Fig 3).…”

Section: Lateral Accretion Deposit On Kampar Kanan River At Buluh Cinmentioning

confidence: 99%

“…Some flood channels become enlarged during floods, and may become the dominant channel (Wood et al, 2008). Oblique accretion sediment is defined here as the lateral accumulation of fine-grained floodplain deposit by progradation of a relatively steep convex bank in assosiation with channel migration (Page et al, 2003). Oblique accretion are developed on the meandering low energy rivers of Kampar Kanan River.…”

Section: Lateral Accretion Deposit On Kampar Kanan River At Buluh Cinmentioning

confidence: 99%

“…The relative contribution of a variety of accretion deposits to the formation of meandering river floodplains have been the subject of prolonged discussion in the geomorphological literature (Page et al, 2003). A channel moving sideways by erosion on the outer bank and deposition on the inner bank is undergoing lateral migration and the deposit on the inner bank is point bars and it will show finingup from coarser material at the base to finer at the top (Nichols, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Uniqueness Deposit of Sediment on Floodplain Resulting From Lateral Accretion on Tropical Area

Yuskar

Choanji

2017

J. Geoscience Eng. Environ. Technol.

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Kampar rivers has a length of 413 km with average depth of 7.7 m and width of 143 m. Sixty percent of this rivers are meandering fluvial system which transport and deposit a mixture of suspended and bed-load (mixed load) along low energy. River channel that moving sideways by erosion is undergoing lateral migration and the top of the point bar becomes the edge of the floodplain and the fining-upward succession of the point bar will be capped by overbank deposits of Kampar bend migration on the suspended-load channels of Kampar watershed. This formation consist of succession of fine to medium sand and silt/mud, with root traces, that form as drapes on the prograding bank. These beds dip mostly channel model is presented showing how -grained within channel deposits in -bar deposits containing alternating sandstone and shale sequences are common in the lowespecially Kampar rivers.

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Numerical modeling of erosional and depositional bank processes in migrating river bends with self‐formed width: Morphodynamics of bar push and bank pull

2014

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Meandering rivers display active communication between bank erosion and bar deposition processes. How does this occur? How does the river select its width? To answer these questions, we implement a model for meander migration where both bank processes (erosion and deposition) are considered independently. Bank erosion is modeled as erosion of purely noncohesive bank material damped by natural slump block armoring; channel deposition is modeled via flow-retarded vegetal encroachment. Both processes are tied to a slope-dependent channel forming Shields number; banks with near-bank Shields number below this value undergo deposition, and those above it undergo erosion. Channel-forming Shields number must increase with slope, as dictated by available data and model performance. Straight channel modeling shows that a channel arrives at an equilibrium width from any initial condition. For the channel bend, the river always approaches an asymptotic state where width reduces slowly in time and where bank erosion and deposition occur at nearly equal rates. Before this state is reached, however, the river follows a phase-plane trajectory with four possible regimes: (a) both banks erode, (b) both banks deposit, (c) both banks migrate outward, but with a faster depositing bank (bar push), and (d) both banks migrate outward, but with a faster eroding bank (bank pull). The trajectory of migration on the phase plane depends on initial conditions and input parameters controlling the rate of depositional and erosional migration. All input parameters have specific physical meaning, and the potential to be measured in the field.

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Floodplain Formation and Sediment Stratigraphy Resulting from Oblique Accretion on the Murrumbidgee River, Australia

Cited by 104 publications

References 23 publications

River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usuktuk River, AK, and the Quinn River, NV

River meandering on Earth and Mars: A comparative study of Aeolis Dorsa meanders, Mars and possible terrestrial analogs of the Usuktuk River, AK, and the Quinn River, NV

Uniqueness Deposit of Sediment on Floodplain Resulting From Lateral Accretion on Tropical Area

Numerical modeling of erosional and depositional bank processes in migrating river bends with self‐formed width: Morphodynamics of bar push and bank pull

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