Bedload sediment transport dynamics in a macrotidal embayment, and implications for export to the southern Great Barrier Reef shelf

Ryan, D. A.; Brooke, Brendan; Bostock, Helen C.; Radke, Lynda; Siwabessy, Justy; Margvelashvili, Nugzar; Skene, Darren

doi:10.1016/j.margeo.2007.02.014

Cited by 29 publications

(25 citation statements)

References 36 publications

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“…Numerous studies have been devoted to these environments in recent years and the morphology and sedimentary partitioning of tide-dominated estuaries are predictable in general terms (Dalrymple, Knight, Zaitlin, & Middleton, 1990;Dalrymple, Mackay, Ichaso, & Choi, 2012;Dalrymple & Zaitlin, 1994;Davis & Hayes, 1984;Ryan et al, 2007;Tessier, Delsinne, & Sorrel, 2010). At the estuary entrance, the accelerated tidal currents shape the seafloor into many bedforms such as dune fields as observed in the San Fransisco Bay (Barnard, Erikson, Elias, & Dartnell, 2012) or large scour features as reported in the Minas Basin in the Bay of Fundy (Shaw, Todd, & Li, 2014).…”

Section: Introductionmentioning

confidence: 99%

Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)

et al. 2016

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Long-studied with respect to its sedimentological features (1897), the Bay of Brest (Western Britanny, France) is a textbook example of a tide-dominated estuary. Characterised by macrotidal conditions, this estuary system is sheltered from the open sea (Iroise Sea) by a narrow strait that partitions the wave tide influences and continental/marine inputs. Sediments are supplied to the bay both by rivers (the Aulne and Elorn rivers) and by marine tidal currents. This study presents new analyses of detailed facies and morphological patterns, based on the integration of multisource data compiling seabed sampling, swath and LIDAR bathymetry, and backscatter imagery. The Main Map, at a scale of 1:90,000, contains (1) a sedimentological distribution using the 'Code Manche' classification, (2) a morphological map, and (3) bathymetric mapping which presents the morphology of marine and terrestrial landforms. This work may lay the foundation for a future study on sedimentary transport in a unique and confined coastal environment. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)

et al. 2016

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“…Within the Fitzroy estuarine floodplain to the south of the estuary are a series of tidal creeks which have a combined area similar to that of the Fitzroy Estuary. From a geologic perspective, the Fitzroy Estuary is transitional between a tide-dominated estuary and a delta because most of the accommodation space for sediment has been filled (Ryan et al 2007). The geomorphology and the flow regime have important consequences for the transport and transformation of dissolved nutrients and nutrients attached to sediments.…”

Section: Study Areamentioning

confidence: 99%

“…Keppel Bay is a macrotidal sediment-starved embayment (Ryan et al 2007). Net shorenormal transport of particulates enhances sediment accumulation in the inter-tidal and shallow sub-tidal areas near the estuary mouth (Ryan et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Net shorenormal transport of particulates enhances sediment accumulation in the inter-tidal and shallow sub-tidal areas near the estuary mouth (Ryan et al 2007). The shoreward transport also produces shore-normal gradients in seabed physical characteristics (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The shoreward transport also produces shore-normal gradients in seabed physical characteristics (i.e. grain size and sorting coefficients; Ryan et al 2007) and water column optical properties (Oubelkheir et al 2006). Superimposed on this spatial variability are semi-diurnal tides with a maximum range of *5 m which impose short-timescale variability on water column properties through advection of water masses and resuspension of the seabed sediment .…”

Section: Introductionmentioning

confidence: 99%

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Biogeochemical Zones Within a Macrotidal, Dry-Tropical Fluvial-Marine Transition Area: A Dry-Season Perspective

et al. 2009

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The Fitzroy River delivers large amounts of nutrients and fine sediments to Keppel Bay (contiguous with the Great Barrier Reef Lagoon) during intermittent flow events. This study explores sources, forms and transformations of nutrients in Keppel Bay, and develops a functional process zonation that integrates seabed geochemistry and water column nutrient characteristics which are controlled by suspended sediment. The water column and seabed properties were investigated over two dry seasons, with supplementary core incubations taken to measure carbon decomposition rates and nutrient fluxes. Keppel Bay can be divided into three zones, the: zone of maximum resuspension (ZMR); coastal transitional zone (CTZ); and blue water zone (BWZ). Mineralisation of predominantly terrestrial organic matter occurs in the ZMR where nutrient uptake by phytoplankton is light limited. The CTZ and BWZ had higher light penetration and phytoplankton growth was likely limited by N and P, respectively. The identified zones conform to the bathymetry and hydrodynamic characteristics of the bay, allowing for the development of an integrated conceptual model accounting for the benthic and pelagic biogeochemical processes. Recognition of these different zones shows that considerable variation in benthic and water column properties is possible within a small system with the bathymetric and hydrodynamic characteristics of the fluidized bed reactor.

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Analyzing Bedforms Mapped Using Multibeam Sonar to Determine Regional Bedload Sediment Transport Patterns in the San Francisco Bay Coastal System

Barnard

Erikson²,

Rubin

et al. 2012

Sediments, Morphology and Sedimentary Processes on Continental Shelves

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Bedload sediment transport dynamics in a macrotidal embayment, and implications for export to the southern Great Barrier Reef shelf

Cited by 29 publications

References 36 publications

Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)

Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)

Biogeochemical Zones Within a Macrotidal, Dry-Tropical Fluvial-Marine Transition Area: A Dry-Season Perspective

Analyzing Bedforms Mapped Using Multibeam Sonar to Determine Regional Bedload Sediment Transport Patterns in the San Francisco Bay Coastal System

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