Three‐dimensional analysis of infiltration from the disc infiltrometer: 2. Physically based infiltration equation

Haverkamp, R.; Ross, P. J.; Smettem, K.R.J.; Parlange, J.‐Y.

doi:10.1029/94wr01788

Cited by 316 publications

(512 citation statements)

References 14 publications

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“…Conversely, the second term dominates as time increases, subject to the limit of t ¼ S 2 /C 2 , when the series expansion from which equation (1) was derived is no longer accurate. Alternate expressions have been developed to describe long-time (steady-state) infiltration behavior [Philip, 1957a[Philip, , 1957bWooding, 1968;Haverkamp et al, 1994], which lend themselves to estimations of K s . However, the time required to reach late-time or quasi-steady state conditions may be impractical, particularly for soils with low hydraulic conductivity, and assumptions of homogeneity are typically violated for long infiltration experiments.…”

Section: Introductionmentioning

confidence: 99%

Modeling effect of initial soil moisture on sorptivity and infiltration

et al. 2013

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[1] A soil's capillarity, associated with the parameter sorptivity, is a dominant control on infiltration, particularly at the onset of rainfall or irrigation. Many mathematical models used to estimate sorptivity are only valid for dry soils. This paper examines how sorptivity and its capillary component (as wetting front potential) change with initial degree of saturation. We capture these effects with a simple modification to the classic Green-Ampt model of sorptivity. The modified model has practical applications, including (1) accurately describing the relative sorptivity of a soil at various water contents and (2) allowing for quantification of a soil's saturated hydraulic conductivity from sorptivity measurements, given estimates of the soil's characteristic curve and initial water content. The latter application is particularly useful in soils of low permeability, where the time required to estimate hydraulic conductivity through steady-state methods can be impractical.

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Section: Introductionmentioning

confidence: 99%

Modeling effect of initial soil moisture on sorptivity and infiltration

et al. 2013

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“…One uncertainty shared by both surface mounted ring and disk infiltrometers is the time variant diameter of the wetting front in the subsurface, which is governed by capillary diffusivity in highly sorptive soils and distorted by macropores and cracks in dual permeability media at high positive heads (Haverkamp, Ross, Smettem, & Parlange, 1994).…”

Section: Introductionmentioning

confidence: 99%

Infiltration performance of engineered surfaces commonly used for distributed stormwater management

Valinski

Chandler

2015

Journal of Environmental Management

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Engineered porous media are commonly used in low impact development (LID) structures to mitigate excess stormwater in urban environments. Differences in infiltrability of these LID systems arise from the wide variety of materials used to create porous surfaces and subsequent maintenance, debris loading, and physical damage. In this study, infiltration capacity of six common materials was tested by multiple replicate experiments with automated mini-disk infiltrometers. The tested materials included porous asphalt, porous concrete, porous brick pavers, flexible porous pavement, engineered soils, and native soils. Porous asphalt, large porous brick pavers, and curb cutout rain gardens showed the greatest infiltration rates. Most engineered porous pavements and soils performed better than the native silt loam soils. Infiltration performance was found to be related more to site design and environmental factors than material choice. Sediment trap zones in both pavements and engineered soil rain gardens were found to be beneficial to the whole site performance. Winter chloride application had a large negative impact on poured in place concrete, making it a poor choice for heavily salted areas.

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“…Several studies have shown that Wooding's approach will overestimate the soil hydraulic conductivity if steady-state infiltration is not reached. Discrepancies between tension infiltrometer and other methods in practice, however, are caused probably more by variability within each method such as soil heterogeneity or simplification of the hydraulic conductivity function to an exponential expression, than by inherent limitations of the steady-state solutions (Wang et al, 1998 (Warrick, 1992;Haverkamp et al, 1994;Zhang, 1998) have in common the following two-term form of the cumulative infiltration equation:…”

Section: Tension Disc Infiltrationmentioning

confidence: 99%

“…Haverkamp et al (1994), for example, posed the following physically based expressions valid for times not approaching steady-state:…”

Section: Tension Disc Infiltrationmentioning

confidence: 99%

Determining Soil Hydraulic Properties

Durner

Lipsius

2005

Encyclopedia of Hydrological Sciences

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Hydraulic properties are required for modeling water and solute transport in unsaturated soils. The bottleneck for the successful application of numerical simulation models lays usually in their parameter estimation requirements. Methods to determine hydraulic properties can be classified into indirect and direct approaches. Indirect methods encompass the estimation of hydraulic properties by pedotransfer functions from more easily measured soil properties, and the prediction of the unsaturated hydraulic conductivity function from the water retention curve ( WRC ). In direct methods, observations of flow attributes from laboratory or field experiments are evaluated. This article reviews common methods to estimate the hydraulic conductivity function from the water retention characteristic and various direct measurement techniques in the laboratory and the field. We conclude with an outlook on contemporary developments in measurement techniques, stressing the key role of inverse modeling of experiments to derive optimum hydraulic properties and the importance of a future combination of noninvasive measurement techniques with inverse modeling by stochastic data fusion.

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Three‐dimensional analysis of infiltration from the disc infiltrometer: 2. Physically based infiltration equation

Cited by 316 publications

References 14 publications

Modeling effect of initial soil moisture on sorptivity and infiltration

Modeling effect of initial soil moisture on sorptivity and infiltration

Infiltration performance of engineered surfaces commonly used for distributed stormwater management

Determining Soil Hydraulic Properties

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