Colloid transport and distribution in the hyporheic zone

Jin, Guangqiu; Zhang, Zhongtian; Tang, Hongwu; Yang, Xiaoquan; Li, Ling; Barry, David Andrew

doi:10.1002/hyp.13375

Cited by 25 publications

(27 citation statements)

References 49 publications

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“…Therefore, particles that also transport with solute, likely all particles <1 mm regardless of particle density (Drummond, Aubeneau, & Packman, 2014), will be influenced by wood additions and transport similarly within this stream. However, larger and denser particles than those used in the study but still <1 mm are even more likely to immobilize and be retained within the sediments, as they will be preferentially immobilized due to gravitational settling and filtration within sediment porewaters (Bradford, Yates, Bettahar, & Simunek, 2002;Jin et al, 2019).…”

Section: Discussionmentioning

confidence: 97%

Fine particle transport dynamics in response to wood additions in a small agricultural stream

Drummond

Wright‐Stow

Franklin

et al. 2020

Hydrological Processes

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Wood additions to streams can slow water velocities and provide depositional areas for bacteria and fine particles (e.g., particulate organic carbon and nutrients sorbed to fine sediment), therefore increasing solute and particle residence times. Thus, wood additions are thought to create biogeochemical hotspots in streams. Added wood is expected to enhance in‐stream heterogeneity, result in more complex flow paths, increase natural retention of fine particles and alter the geomorphic characteristics of the stream reach. Our aim was to directly measure the impact of wood additions on fine particle transport and retention processes. We conducted conservative solute and fluorescent fine particle tracer injection studies in a small agricultural stream in the Whatawhata catchment, North Island of New Zealand in two reaches—a control reach and a reach restored 1‐year earlier by means of wood additions. Fine particles were quantified in surface water to assess reach‐scale (channel thalweg) and habitat‐scale (near wood) transport and retention. Following the injection, habitat‐scale measurements were taken in biofilms on cobbles and by stirring streambed sediment to measure fine particles available for resuspension. Tracer injection results showed that fine particle retention was greater in the restored compared to the control reach, with increased habitat‐scale particle counts and reach‐scale particle retention. Particle deposition was positively correlated with cobble biofilm biomass. We also found that the addition of wood enhanced hydraulic complexity and increased the retention of solute and fine particles near the wood, especially near a channel spanning log. Furthermore, particles were more easily remobilized from the control reach. The mean particle size remobilized after stirring the sediments was ~5 μm, a similar size to both fine particulate organic matter and many microorganisms. These results demonstrate that particles in this size range are dynamic and more likely to remobilize and transport further downstream during bed mobilization events.

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Section: Discussionmentioning

confidence: 97%

Fine particle transport dynamics in response to wood additions in a small agricultural stream

Drummond

Wright‐Stow

Franklin

et al. 2020

Hydrological Processes

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“…Although, we do not know their exact values of fine particle diameter and sediment collision efficiency, estimations can be made. The value of sediment collision efficiency could be approximated as 0.42, following Karwan and Saiers (2012) who used a similar sediment composition in their experiments, and the diameter of fine particles between 2~7 µm, based on other experiments that also used kaolinite as fine particles for studying bed clogging (Jin et al, 2019;Rehg et al, 2005). Then, from the analytical solution we predict a clogging time ranging from 6~75h, which is on the same time scale as given by experimental measurements.…”

Section: Discussionmentioning

confidence: 99%

Interplay of hyporheic exchange and fine particle deposition in a riverbed

Jin

Chen

Tang

et al. 2019

Advances in Water Resources

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Hyporheic flow transports fine particles into the riverbed, which can lead to clogging of the bed and in turn affect hyporheic flow and exchange processes. Field measurements and numerical simulations show the formation of a low-permeability layer (LPL) near the bed surface due to fine particle clogging, and consequently reduction of exchange fluxes between the bed and river water. A characteristic porosity (* * . The results also showed significant effects of the fine particle concentration, pressure difference, sediment collision efficiency and fine particle diameter on the bed clogging. Large values of these parameters led to intensified clogging, with the formation of different types of LPL.

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“…Fine particle deposition, ubiquitous within rivers systems, is driven by the interactions of surface flow and bed morphology (Harvey et al, ; Packman et al, , ). Suspended particles in rivers are typically minerals or aggregations of organic matter with sizes smaller than 10

normalμ

m (Drummond et al, , ; Harvey et al, ; Huettel et al, ; Jin et al, ). Fine particles, due to their small size and density, are easily suspended in water (Packman et al, ).…”

Section: Introductionmentioning

confidence: 99%

Fine Sediment Deposition and Filtration Under Losing and Gaining Flow Conditions: A Particle Tracking Model Approach

Preziosi-Ribero

Packman

Escobar-Vargas

et al. 2020

Water Resources Research

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Fine particle deposition within riverbeds plays a major role in riverine ecology and biogeochemistry by altering hyporheic exchange flux. Moreover, it is ubiquitous within streams and rivers across all flow stages. However, the dynamics of fine particle deposition are still not completely understood in rivers, and continuum models like the advection dispersion equation require modifications to represent the processes accurately. To enhance understanding of fine particle dynamics, we developed a novel numerical particle tracking model that simulates fine particle deposition as a stochastic process under losing, neutral, and gaining streamflow conditions. These flow conditions generate three different velocity profiles by combining the free surface and groundwater flows. In addition, a novel aspect of our model is the storage of filtered particles to estimate concentration fields within the bed. Our simulated results are qualitatively compared with previous laboratory flume experimental results of kaolinite deposition under similar conditions. The model indicates that fine particle deposition patterns and residence time functions depend heavily on the exchange flux between stream and groundwater, as well as bed filtration properties as the deposition of particles occurs at greater depths in the losing stream condition than in the neutral and gaining cases. Therefore, the spatial pattern of particle deposition is a direct result of pore water velocity profiles, while the concentration depends on filtration dynamics within the bed.

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Colloid transport and distribution in the hyporheic zone

Cited by 25 publications

References 49 publications

Fine particle transport dynamics in response to wood additions in a small agricultural stream

Fine particle transport dynamics in response to wood additions in a small agricultural stream

Interplay of hyporheic exchange and fine particle deposition in a riverbed

Fine Sediment Deposition and Filtration Under Losing and Gaining Flow Conditions: A Particle Tracking Model Approach

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