Can vegetative filter strips efficiently trap trace elements during water erosion events? A flume experiment with contaminated sediments

Lambrechts, Thomas; Braekeleer, Charlotte de; Fautsch, Vincent; Iserentant, Anne; Rentmeesters, Guido; Lutts, Stanley; Bielders, Charles

doi:10.1016/j.ecoleng.2014.03.092

Cited by 5 publications

(5 citation statements)

References 19 publications

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“…The hypothesis that vegetation composed of traits inducing a high efficiency in sediment retention would present a wider diversity of sediment particle sizes was also emphasised in the graminoid conditions due to their higher density-weighted leaf area, especially for C. pendula. The effects of herbaceous vegetation, notably graminoid species, on sediment retention regarding the particle size fractions have been studied over the past decades, especially in the concern of pollutants dispersion with the finer particles (Meyer et al 1995;Syversen and Borch 2005;Liu et al 2008;Lambrechts et al 2014). It has been shown that the coarser particles tend to deposit upstream the vegetation while finer one deposit within or pass through the vegetation.…”

Section: Discussionmentioning

confidence: 99%

“…More the flow velocity will be reduced, more the quantity of sediments which will be retained by the vegetation will comprise a wider variety of particle sizes, and especially smaller particles (Haan et al 1994;Syversen and Borch 2005). This indirect effect of the plant traits on the fractions of sediment particles retained constitutes an important feature to understand the vegetation effects on soil erosion, notably regarding the environmental consequences as the smaller sediment particles are the most impacting ones regarding pollutant dispersion and water quality degradation (Syversen and Borch 2005;Liu et al 2008;Lambrechts et al 2014). The effects of functional traits on hydraulic roughness and sediment retention have been studied over the past decades, showing the effects of aboveground biomass, projected stem area (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Effects of plant traits and their divergence on runoff and sediment retention in herbaceous vegetation

Kervroëdan

Armand

Saunier³

et al. 2019

Plant Soil

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AimsPlant species diversity impacts ecosystem processes, but its effects on runoff and soil erosion are not fully understood. Herbaceous vegetation control concentrated runoff and soil erosion through the increase of hydraulic roughness which leads to sediment retention. This study aims to investigate the effect of aboveground traits and their divergence (i.e., stem diameter and density, and leaf area and density) on hydraulic roughness and sediment retention in plant communities. MethodsRunoff experimentations were performed, using a sediment input, on three mono-specific and one multi-specific conditions composed of plant species with contrasting traits furthering hydraulic roughness and sediment retention. ResultsNo effect of trait diversity was found on the hydraulic roughness and sediment retention; which would be explained by the absence of an optimal space use by the traits involved in the increase of the hydraulic roughness. The dominant effect of the community-weighted traits in the plant community drives the effects of the vegetation on the hydraulic roughness and sediment retention. ConclusionThis absence of positive effects of the trait diversity on hydraulic roughness and sediment retention constitutes an important knowledge to model runoff and soil erosion processes and to design herbaceous infrastructures for soil erosion control.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of plant traits and their divergence on runoff and sediment retention in herbaceous vegetation

Kervroëdan

Armand

Saunier³

et al. 2019

Plant Soil

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“…At present, vegetated filter strips (VFSs) has been considered as one of the most important operational measures to deal with nonpoint source pollution. They can remove pollutants, such as sediment (Flanagan et al 2017), nitrogen and phosphorus (Scavia et al 2017), colloids (Purich 2006), and trace elements (Lambrechts et al 2014) from surface flow. To investigate the colloid transport process in VFSs is of significant meaning for controlling colloidal nonpoint source pollution.…”

Section: Introductionmentioning

confidence: 99%

“…2017), colloids (Purich 2006), and trace elements (Lambrechts et al. 2014) from surface flow. To investigate the colloid transport process in VFSs is of significant meaning for controlling colloidal nonpoint source pollution.…”

Section: Introductionmentioning

confidence: 99%

Colloid‐Pollutant Migration through Saturated Vegetative Filter Strips with Various Hydrodynamics Condition under Rainfall

Sun

et al. 2022

J American Water Resour Assoc

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Flow hydrodynamics condition has a significant impact on the fate and transport of colloid-pollutant in vegetation filter strips, and is critical to the control of nonpoint source pollution.ABSTRACT: Flow hydrodynamic condition impacts the deposition process on vegetation and removal of colloid and colloid-associated contaminants in saturated vegetative filter strips (VFSs) under rainfall. A 9.6-m-long flume was constructed to investigate the retention of colloids through VFSs, with saturated soil and simulated rainfall. Colloidal filtration theory was applied to calculate the colloid deposition rate coefficient (k d ) on vegetation surface. The result showed that removal efficiencies (η) of the single-stem decreased, but colloid k d on the flume scale vegetation increased with increased Reynolds number (Re). Flume experiment found that the colloid retention rate in VFSs decreased as the Re increased. Since deposition on vegetation surface and diffusion into saturated soil are two main removal mechanisms, the discrepancy between k d and retention rate suggests that colloid diffusion into the soil was the dominant process of colloid removal in saturate VFSs. The research deepens the understanding of colloid transport mechanism in VFSs, and provides theoretical basis for the design of VFSs.

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“…A review by Dorioz et al (2006) indicated that grass buffer strips implemented in agricultural fields reduced over 50% sediment and P loads to waterways. Furthermore, Lambrechts et al (2014) studied the retention of selected heavy metals with the use of two plant species (white clover [ Trifolium repens L.] and perennial ryegrass [ Lolium perenne L.]) as vegetative filter strips. The authors observed approximately 20% higher retention of Cd and Zn for the filter strip with T. repens compared with bare soil.…”

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confidence: 99%

Effects of Grazing Management and Buffer Strips on Metal Runoff from Pastures Fertilized with Poultry Litter

et al. 2017

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Metal runoff from fields fertilized with poultry litter may pose a threat to aquatic systems. Buffer strips located adjacent to fields may reduce nutrients and solids in runoff. However, scant information exists on the long-term effects of buffer strips combined with grazing management on metal runoff from pastures. The objective of this study was to assess the 12-yr impact of grazing management and buffer strips on metal runoff from pastures receiving poultry litter. The research was conducted using 15 watersheds (25 m wide and 57 m long) with five treatments: hayed (H), continuously grazed (CG), rotationally grazed (R), rotationally grazed with a buffer strip (RB), and rotationally grazed with a fenced riparian buffer strip (RBR). Poultry litter was applied annually in spring at 5.6 Mg ha. Runoff samples were collected after every rainfall event. Aluminum (Al) and iron (Fe) concentrations were strongly and positively correlated with total suspended solids, indicating soil erosion was the primary source. Soluble Al and Fe were not related to total Al and Fe. However, there was a strong positive correlation between soluble and total copper (Cu) concentrations. The majority of total Cu and zinc was in water-soluble form. The CG treatment had the highest metal concentrations and loads of all treatments. The RBR and H treatments resulted in lower concentrations of total Al, Cu, Fe, potassium, manganese, and total organic carbon in the runoff. Rotational grazing with a fenced riparian buffer and converting pastures to hayfields appear to be effective management systems for decreasing concentrations and loads of metals in surface runoff from pastures fertilized with poultry litter.

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Can vegetative filter strips efficiently trap trace elements during water erosion events? A flume experiment with contaminated sediments

Cited by 5 publications

References 19 publications

Effects of plant traits and their divergence on runoff and sediment retention in herbaceous vegetation

Effects of plant traits and their divergence on runoff and sediment retention in herbaceous vegetation

Colloid‐Pollutant Migration through Saturated Vegetative Filter Strips with Various Hydrodynamics Condition under Rainfall

Effects of Grazing Management and Buffer Strips on Metal Runoff from Pastures Fertilized with Poultry Litter

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