Likelihood of burrow flow in Canadian agricultural lands

Dadfar, Humaira; Allaire, Suzanne; Bochove, Éric van; Denault, Jean-Thomas; Thériault, Georges; Charles, Anaïs

doi:10.1016/j.jhydrol.2010.03.016

Cited by 11 publications

(12 citation statements)

References 77 publications

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“…A luminescence spectrophotometer (model LS55, Perkin Elmer) was used to measure rhodamine concentration. The rhodamine was excited at 560 nm and emissions were measured at 577 nm [ 16 ]. The rhodamine detection limits were 0.08 and 25 x 10 −3 mg L -1 .…”

Section: Methodsmentioning

confidence: 99%

“…Transportation time in the subsurface generally decreases with an increase in slope, in the presence of shallow soil, with low permeable soil underneath the surficial one, with artificial drainage (constructed lateral preferential flows), in the presence of large lateral roots or biopores which creates lateral preferential flows called ‘pipe flows’, with other lateral preferential flow processes, and when there is sufficient precipitation to trigger water movement [ 12 ]. Within the subsurface, vertical processes carry contaminants downward [ 13 – 16 ], while horizontal processes transport them toward surface water. The connectivity between vertical and horizontal processes governs the overall reaction time of the field with respect to contaminant transport toward surface water.…”

Section: Introductionmentioning

confidence: 99%

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Potential Efficiency of Riparian Vegetated Buffer Strips in Intercepting Soluble Compounds in the Presence of Subsurface Preferential Flows

Allaire¹,

Sylvain²,

Lange³

et al. 2015

PLoS ONE

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Buffer strips have been widely recognized as to promote infiltration, deposition and sorption of contaminants for protecting surface water against agricultural contamination. However, such strips do not intercept all contaminants, particularly soluble ones. Although preferential flow (PF) has been suggested as one factor among several decreasing the efficiency of buffer strips, the mechanisms involved are not well understood. This project examines buffer strip efficiency at intercepting solutes when subsurface PF occurs. Two soluble sorbed tracers, FD&C Blue #1 and rhodamine WT, were applied on an agricultural sandy loam soil to evaluate the ability of a naturally vegetated buffer strip to intercept soluble contaminants. Rhodamine was applied about 15 m from the creek, while the Blue was applied 15 m to 165 m from the creek. Tracer concentration was measured over a two-year period in both the creek and the buffer strip through soil and water samples. Although the tracers traveled via different pathways, they both quickly moved toward the creek, passing beneath the buffer strip through the soil matrix. Our results demonstrate that the risk of water contamination by soluble contaminants is high in such systems, even when a well-vegetated buffer strip is used. The design of buffer strips should be modified to account for underground bypass, either by using plants that have deep, fine roots that do not favour PF or by adding a filter extending deep underground that can be regularly changed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potential Efficiency of Riparian Vegetated Buffer Strips in Intercepting Soluble Compounds in the Presence of Subsurface Preferential Flows

Allaire¹,

Sylvain²,

Lange³

et al. 2015

PLoS ONE

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“…The tile drains reduce the amount of surface runoff, diverting that water into the tile drains, but also carrying the portion of the sediment that is carried with the portion of tile flow that has reached the tile through macropores rather than soil matrix flow. The partitioning of water between surface runoff and tile flow is predicted using the hydrology module of the DNDC model (Kröbel et al, 2010;Dutta et al, 2016;Guest et al, 2017), and the fraction of tile flow from macropores is derived from the probability of burrow flow (through anecic worm burrows) (Dadfar et al, 2010a) and crack flow (Dadfar et al, 2010b). In general, the macropore flow is highest for the fine and medium textured soils, and lowest for the coarse textured soils.…”

Section: Bioavailable Particulate Pmentioning

confidence: 99%

Components of Phosphorus Loss From Agricultural Landscapes, and How to Incorporate Them Into Risk Assessment Tools

2018

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“…Beyond that, CVPs can enhance air transport in soils [5] and water percolation, reducing the risk of water ponding or water runoff from the surface [6]. In turn, water flow through CVPs was shown to increase the transport of solutes such as nitrate, dissolved P and plant protection agents towards the ground water body [7] [8] [9]. Potential beneficial effects of CVPs on crop growth are particularly related to their function as preferential pathways for root elongation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Continuous Vertical Soil Pores on Root and Shoot Growth of Winter Wheat: A Microcosm Study

Dresemann¹,

Athmann²,

Heringer³

et al. 2018

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Round shaped, continuous vertical pores (CVPs) in the soil are typically created by roots and earthworms. CVPs with diameters > 2 mm are abundant in many agricultural soils. We hypothesized that potential effects of CVPs on shoot growth of winter wheat (Triticum aestivum L.) increase with: 1) decreasing availability of water and 2) decreasing availability of nutrients in the topsoil. We conducted a microcosm experiment with different irrigation regimes (Irr+/Irr−) and P concentrations (P+/P−), with or without artificially created continuous vertical pores (CVP+/CVP−). Winter wheat was cultivated for 16 weeks. In the bulk soil, presence of CVPs resulted in decreased root length in 20 -40 cm but increased root length in 40 -60 cm soil depth. In general, total root length of winter wheat in 20 -60 cm soil depth was higher when CVPs were present or when P concentrations in the topsoil were elevated. Presence of CVPs generally had a positive effect on shoot dry matter and N uptake of wheat. In columns with high phosphorous concentrations but low soil moisture in the topsoil, presence of CVPs increased shoot dry matter by 66%; in contrast, the beneficial effect of CVPs on shoot dry matter was only 39% in columns with high nutrient concentrations and high soil moisture in the topsoil. In total numbers, however, the effect of CVPs on P uptake into the shoot was more pronounced when P concentrations in the topsoil were elevated. We conclude that CVPs can promote the exploration of the solid soil phase by high root-length densities, but adequate nutrient supply in the topsoil is essential.

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Likelihood of burrow flow in Canadian agricultural lands

Cited by 11 publications

References 77 publications

Potential Efficiency of Riparian Vegetated Buffer Strips in Intercepting Soluble Compounds in the Presence of Subsurface Preferential Flows

Potential Efficiency of Riparian Vegetated Buffer Strips in Intercepting Soluble Compounds in the Presence of Subsurface Preferential Flows

Components of Phosphorus Loss From Agricultural Landscapes, and How to Incorporate Them Into Risk Assessment Tools

Effects of Continuous Vertical Soil Pores on Root and Shoot Growth of Winter Wheat: A Microcosm Study

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