Research and developments in selecting subsurface drainage materials

Dierickx, W.

doi:10.1007/bf01112230

Cited by 20 publications

(8 citation statements)

References 1 publication

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“…There is a range of dimensionless source radii (0.07 < ã < 0.4) where the agreement with the simple Equation ( 11) is very good (better than 2.5%). The deviations occurring at larger dimensionless source radii are due to deteriorating accuracy of the approximation of point-like sources used to derive Equations ( 7), (10), and (11). Taking the finite size of the selected source into account "on average" as in Equation ( 12) improves the agreement and expectedly reproduces somewhat better the results obtained for the cylindrical cell.…”

Section: Resultsmentioning

confidence: 90%

“…In a number of cases, such processes occur in highly heterogeneous structures. Examples are as diverse as evaporation of multiple sessile drops, water-vapor condensation on structured surfaces, [1,2] dissolution of nano-bubbles or nano-droplets attached to surfaces, [3] plant transpiration via stomata, [4] currentinduced concentration polarization of arrays of microelectrodes, [5][6][7] solvent and solute flows in thin-film composite membranes, [8] soil drainage using perforated tubes, [9,10] or fluid flows in composite materials containing perforated layers. [11,12] A useful mathematical idealization of such structures is impervious domains alternating with zones of extremely high "conductivity" (or permeability or diffusivity depending on the process).…”

Section: Introductionmentioning

confidence: 99%

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Interaction of Potential Sources in Infinite 2D Arrays: Diffusion through Composite Membranes, Micro‐Electrochemistry, Entrance Resistance, and Other Examples

Yaroshchuk

Bondarenko

2021

Advcd Theory and Sims

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Regular 2D arrays of potential sources on impervious “screens” are a mathematical idealization for the description of a number of natural and/or technological processes. At steady state, they are described by Laplace equation with suitable boundary conditions. This study explains the evolution of boundary conditions from a given potential to a given potential gradient at infinity with increasing size of arrays and provides a criterion for micro‐ and macro‐arrays in terms of distance to potential‐defining surfaces. For regular macro‐arrays, the problem is formulated and solved numerically by using cell models. The use of rigorous cell models requires 3D numerical simulations, but a simplified (cylindrical, 2D) cell model is shown to have an excellent accuracy. Numerical as well as theoretical analyses reveal a simple far‐field behavior described by an asymptotic expression for an additional potential drop (applicable for sources whose size does not exceed about 40% of the intersource distance) dependent on just one numerical constant. This expression is used for the derivation of useful approximate formulae for several applications (diffusion resistance of composite membranes, limiting current in arrays of microelectrodes, entrance diffusion resistance in arrays of scarce and short nanopores) and compared with relevant interpolation formulae available in the literature.

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Interaction of Potential Sources in Infinite 2D Arrays: Diffusion through Composite Membranes, Micro‐Electrochemistry, Entrance Resistance, and Other Examples

Yaroshchuk

Bondarenko

2021

Advcd Theory and Sims

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“…Concerning the drainage materials, primarily papers with an agricultural background can be found. Dierickx (1993) provides an overview of the recent research and development on drainage and envelope materials. Brauns and Gottheil (1989) have presented quantitative results concerning the hydraulic effects of drain pipes in homogeneous embankment dams.…”

Section: General Principle (Of the Stabilization Technique)mentioning

confidence: 99%

Stabilisation of river dykes with drainage elements

Riegger

Bieberstein

Hörtkorn

et al. 2009

Nat. Hazards Earth Syst. Sci.

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Abstract. In recent times, enormous damage has been caused by dyke failures during and after river flood disasters throughout the world. Besides extreme meteorological conditions the reasons for these failures are inadequate design and the actual condition of affected dyke structures.To minimize the occurrence of dyke failures in future, in a national BMBF research project (BMBF: German Federal Ministry of Education and Research) an alternative stabilisation technique has been investigated as an instrument for short term refurbishment and as an improvement to existing and endangered dyke structures.It is intended to improve the stability of dyke structures by the mechanical installation of drainage devices, thus preventing dyke failure by controlling the seepage in the structure.Within the scope of this paper selected results concerning stabilizing capability and feasibility of the stabilisation technique are presented in detail. Concerning feasibility the focus is placed on natural scale model tests to verify numerical calculations and to investigate the suitability of the adapted installation methods in situ.

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“…The performance and lifespan of land drainage systems in Ireland are highly variable and poorly understood (Tuohy et al, 2018a), and are dependent on, amongst other factors, the quality and suitability of the materials used in field drains, and on keeping such drains well maintained. Dierickx (1993) observed that the majority of problems in selecting appropriate materials are due to uncertainties about aggregate specifications, aggregate form (rounded or angular), lack of uniform aggregate quality, segregation during transportation and installation or poor availability of appropriate aggregate for a given soil type. The relative costs of stone aggregate can direct the farmer or contractor towards unsuitable materials in many cases.…”

Section: Introductionmentioning

confidence: 99%

The distribution, type, popularity, size and availability of river-run gravel and crushed stone for use in land drainage systems and their suitability for mineral soils in Ireland

Byrne

Healy

Fenton

et al. 2022

Irish Journal of Agricultural and Food Research

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The performance of land drainage systems installed in mineral soils in Ireland is highly variable, and is dependent on, amongst other factors, the quality and suitability of the aggregate used. In Ireland, aggregate for land drainage systems is usually river-run gravel and crushed stone. This study classified the distribution, type, popularity, size and availability of aggregates for land drainage systems throughout Ireland and quantified their suitability for use in mineral soils. Eighty-six quarries were surveyed. Limestone and river-run gravel (80% of lithologies) are widespread throughout the country. The quarry aggregate sizes (“Q sizes”), reported by the quarries as either a single size, that is, “50 mm”, or a graded size, that is, 20–40 mm, were variable, changed across lithology and region and were, in most cases, larger than what is currently recommended. A particle size distribution analysis of 74 samples from 62 quarries showed that individual Q sizes increased in variability with increasing aggregate size. In some regions, the aggregate sold does not meet current national regulations, which specify an aggregate size ranging from 10 to 40 mm. The suitability of these aggregates for drainage in five soils of different textures was compared using three established design criteria. It was found that the aggregate in use is too large for heavy soil textures and is therefore unsuitable as drainage envelope material. Guidance for contractors, farmers and quarry owners will be required, and investment may be needed by quarries to produce aggregate that satisfies design criteria. An aggregate size, based on one or a combination of established aggregate design criteria, where an analysis of the soil texture is conducted and an appropriate aggregate is chosen based off its 15% passing size, is required.

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Research and developments in selecting subsurface drainage materials

Cited by 20 publications

References 1 publication

Interaction of Potential Sources in Infinite 2D Arrays: Diffusion through Composite Membranes, Micro‐Electrochemistry, Entrance Resistance, and Other Examples

Interaction of Potential Sources in Infinite 2D Arrays: Diffusion through Composite Membranes, Micro‐Electrochemistry, Entrance Resistance, and Other Examples

Stabilisation of river dykes with drainage elements

The distribution, type, popularity, size and availability of river-run gravel and crushed stone for use in land drainage systems and their suitability for mineral soils in Ireland

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