Measurements of the critical erosion threshold of surface sediments along the Tamar Estuary using a mini-annular flume

Bale, A.J.; Widdows, J.; Harris, Carolyn; Stephens, J.A.

doi:10.1016/j.csr.2006.04.003

Cited by 60 publications

(31 citation statements)

References 42 publications

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“…The high wind speed corresponded to the higher rotating speed of the electric motor, which produced a greater shear stress. Our result is in accordance with previous reports that greater shear stress causes more particles to be resuspended (Sgro et al, 2005;Bale et al, 2006;Widdows et al, 2009). It should be noted that more small particles were resuspended in the water column in the worm treatment compared with the control (Fig.…”

Section: Discussionsupporting

confidence: 93%

“…6) and hydraulic conductivity of the sediment, in agreement with previous studies (Fukuhara, 1987;Nogaro et al, 2006). The degree of consolidation is a key factor in determining sediment erodibility, and sediment with a higher water content is more likely to be eroded (Bale et al, 2006;de Lucas Pardo et al, 2013). The effect of tubificids on sediment water content and consolidation is thus a key reason for the increased sediment resuspension observed in our study.…”

Section: Discussionsupporting

confidence: 92%

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The role of tubificid worms (Limnodrilus hoffmeisteri) in sediment resuspension: a microcosm study

Zhang

Shang

et al. 2014

Ann. Limnol. - Int. J. Lim.

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-Sediment resuspension is an important internal lake process in regulating nutrient cycling and ecosystem structure. Tubificid worms are widely and abundantly distributed in freshwater ecosystems and are able to alter the sediment characteristics. This study was conducted to verify the hypothesis that the alteration of sediments by tubificids may substantially influence the sediment resuspension process. Specifically, we investigated the influence of Limnodrilus hoffmeisteri (Tubificidae) on sediment resuspension using an apparatus designed to simulate the sediment resuspension process in Lake Taihu (China). We examined L. hoffmeisteri according to its density (30 000 ind.m x2 ) in Lake Taihu and simulated the light ) wind processes present in Lake Taihu. Tubificids loosened the sediment through their feeding and defecation activities and increased the sediment water content. The appearance of tubificids increased the suspended solids (SS) in a 1.6 m water column under all three wind processes. During the sedimentation process, SS decreased rapidly in both the control and tubificid treatments. The total SS in the water column was significantly increased by tubificids and it changed significantly with time. In addition, the small size particles of the SS in the tubificid treatment were higher than that in the control. So, the appearance of tubificid worms (L. hoffmeisteri) enhanced sediment resuspension and raised the proportion of small size particles in SS.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 92%

The role of tubificid worms (Limnodrilus hoffmeisteri) in sediment resuspension: a microcosm study

Zhang

Shang

et al. 2014

Ann. Limnol. - Int. J. Lim.

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“…The origin of Al 2 O 3 , Ni and Cu in the Pearl River Estuary is seen in rock and soil weathering. The concentrations of the geochemical parameters Ni and Cu reflect a natural and anthropogenic factor in the sediments (Bale et al, 2006). Out of these elements Cu originate from point sources (Liu et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Surface Sediments of the Pearl River Estuary (South China Sea) – Spatial Distribution of Sedimentological / Geochemical Properties and Environmental Interpretation

Heise¹,

Bobertz

Tang

et al. 2013

Journal of Coastal Research

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“…P exchange across the sediment-water interface through adsorption-desorption and coprecipitation-dissolution processes plays a critical role in governing dissolved phosphate concentrations in overlying waters (Saavedra and Delgado, 2005;Selig, 2003;Bale et al, 2006). Such exchange processes are largely controlled by the chemical composition and physical properties of particles (Fu et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Critical velocity in phosphorus exchange processes across the sediment-water interface

Wan¹,

Wang²,

Li³

et al. 2013

Journal of Environmental Sciences

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Sediments are ultimate sinks of nutrients in lakes that record the pollution history evolutionary processes, and anthropogenic activities of a lake. However, sediments are considered as inner sources of environmental factor changes such as the variation in hydrodynamic conditions because of the nutrients they release. How does this process happen? This study investigates a typical nutrient phosphorus (P) exchange among sediment, suspended particle matter (SPM), and water. Compared with numerical and experimental studies, this study confirms that the critical velocity that occurs at a lower flow rate state exists in the range of 7 to 15 cm/sec. Critical velocity below the critical flow rate promotes the migration of particulate phosphorus (PP) to the SPM. On the other hand, critical velocity above the critical flow rate promotes the release of PP in water.

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Measurements of the critical erosion threshold of surface sediments along the Tamar Estuary using a mini-annular flume

Cited by 60 publications

References 42 publications

The role of tubificid worms (Limnodrilus hoffmeisteri) in sediment resuspension: a microcosm study

The role of tubificid worms (Limnodrilus hoffmeisteri) in sediment resuspension: a microcosm study

Surface Sediments of the Pearl River Estuary (South China Sea) – Spatial Distribution of Sedimentological / Geochemical Properties and Environmental Interpretation

Critical velocity in phosphorus exchange processes across the sediment-water interface

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