Suspended sediment fluxes in the tidal Ouse, UK

Uncles, R.J.; Stephens, John A.

doi:10.1002/(sici)1099-1085(199905)13:7<1167::aid-hyp796>3.0.co;2-d

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…There was a pronounced increase in particle size in the tidal river, up-estuary of the ETM. Under conditions of high freshwater flows, the inflow can be much more turbid (more than 100 mg l −1 , as opposed to 6 mg l −1 , Uncles and Stephens 1999), and SPM derived from the ensuing catchment erosion typically has a much greater percentage of clay-sized particles (Walling et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Properties of suspended sediment in the estuarine turbidity maximum of the highly turbid Humber Estuary system, UK

2006

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Measurements are presented of the properties of suspended particulate matter (SPM) in the estuarine turbidity maximum (ETM) of the upper Humber and Ouse estuaries during transient, relatively low freshwater inflow conditions of September 1995. Very high concentrations of near-bed SPM (more than 100 g l −1 ) were observed in the low-salinity (less than 1), upper reaches. SPM within the ETM consisted largely of fine sediment (silt and clay) that existed as microfloc and macrofloc aggregates and individual particles. Primary sediment particles were very fine grained, and typically, about 20-30% was clay-sized at high water. The clay mineralogy was dominated by chlorite and illite. There was a pronounced increase in particle size in the tidal river, up-estuary of the ETM. The mean specific surface area (SSA) of near-bed SPM within the ETM was 22 m 2 g −1 on a spring tide and 24 m 2 g −1 on a neap tide. A tidal cycle of measurements within a near-bed, high concentration SPM layer during a very small neap tide gave a mean SSA of 26 m 2 g −1 . The percentage of silt and clay in surficial bed sediments along the main channel of the estuary varied strongly. The relatively low silt and clay percentage of surficial bed sediments (about 10-35%) within the ETM's region of highest near-bed SPM concentrations and their low SSA values were in marked contrast to the overlying SPM. The loss on ignition (LOI) of near-bed SPM in the turbid reaches of the estuary was about 10%, compared with about 12% for surface SPM and more than 40% in the very low turbidity waters up-estuary of the ETM. Settling velocities of Humber-Ouse SPM, sampled in situ and measured using a settling column, maximized at 1.5 mm s −1 and exhibited hindered settling at higher SPM concentrations.

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Section: Discussionmentioning

confidence: 99%

Properties of suspended sediment in the estuarine turbidity maximum of the highly turbid Humber Estuary system, UK

2006

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“…Investigation of land-sea interactions were initially dominated by fields of biogeochemistry (69 articles published) and ecology (50 articles published), accounting for 71.6% of the total of articles. Particularly, when articles of land-sea interactions began to be published in 1997, most of them were in the United Kingdom in disciplines of biogeochemistry with focus on nutrients and sediment fluxes (e.g., [24,[29][30][31]). On the other hand, management research represents 12% of studies with 20 articles, which began in 2010 (Figure 3; e.g., [32,33]).…”

Section: Discipline and Focus Of Researchmentioning

confidence: 99%

Land–Sea Interactions and Ecosystem Services: Research Gaps and Future Challenges

2023

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The land–sea interface is essential for understanding the interconnectedness of terrestrial and marine ecosystems and provides ecosystem services to people. Although research has been conducted on both ecosystems, knowledge about their interactions remains limited. While there has been growing research interest on land–sea interactions over the last decade, other types of knowledge system such as local or indigenous knowledge have not yet been included. The goal of this study is to review the literature related to land–sea interactions using an ecosystem services framework to help classify existing research. A systematic review of the literature was employed by searching peer-reviewed publications in Web of Science using land–sea interaction keywords. The synthesis identified 166 publications. The findings indicate that the primary disciplines that have investigated land–sea interactions were biogeochemistry and ecology, with a focus on nutrients and interactions. In terms of ecosystem services, supporting and regulating services were the most researched, with urbanization and agricultural and forestry effluents as main studied drivers. Results reveal a need for a more comprehensive view of land–sea interactions that recognizes the critical role that social factors play in shaping the sustainability of these systems. Therefore, a future challenge involves using a more holistic approach to the study and management of land–sea interactions.

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“…Estuaries are inherently dynamic systems that are characterized by nonlinearities in flow and material transport, as well as important departures from steady state (e.g. Regnier et al 1997;Uncles and Stephens 1999;Dyer 2001;Arndt et al 2009). The transient nature of the estuarine environment can be illustrated by examining the relationship between salinity and river discharge (Fig.…”

Section: Temporal Variabilitymentioning

confidence: 99%

Modelling Estuarine Biogeochemical Dynamics: From the Local to the Global Scale

et al. 2013

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Estuaries act as strong carbon and nutrient filters and are relevant contributors to the atmospheric CO2 budget. They thus play an important, yet poorly constrained, role for global biogeochemical cycles and climate. This manuscript reviews recent developments in the modelling of estuarine biogeochemical dynamics. The first part provides an overview of the dominant physical and biogeochemical processes that control the transformations and fluxes of carbon and nutrients along the estuarine gradient. It highlights the tight links between estuarine geometry, hydrodynamics and scalar transport, as well as the role of transient and nonlinear dynamics. The most important biogeochemical processes are then discussed in the context of key biogeochemical indicators such as the net ecosystem metabolism (NEM), air-water CO2 fluxes, nutrient-filtering capacities and element budgets. In the second part of the paper, we illustrate, on the basis of local estuarine modelling studies, the power of reaction-transport models (RTMs) in understanding and quantifying estuarine biogeochemical dynamics. We show how a combination of RTM and high-resolution data can help disentangle the complex process interplay, which underlies the estuarine NEM, carbon and nutrient fluxes, and how such approaches can provide integrated assessments of the air-water CO2 fluxes along river-estuary-coastal zone continua. In addition, trends in estuarine biogeochemical dynamics across estuarine geometries and environmental scenario are explored, and the results are discussed in the context of improving the modelling of estuarine carbon and CO2 dynamics at regional and global scales

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Suspended sediment fluxes in the tidal Ouse, UK

Cited by 8 publications

References 18 publications

Properties of suspended sediment in the estuarine turbidity maximum of the highly turbid Humber Estuary system, UK

Properties of suspended sediment in the estuarine turbidity maximum of the highly turbid Humber Estuary system, UK

Land–Sea Interactions and Ecosystem Services: Research Gaps and Future Challenges

Modelling Estuarine Biogeochemical Dynamics: From the Local to the Global Scale

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