Search results for " saturated soil hydraulic conductivity"

showing 5 items of 5 documents

Source shape and data analysis procedure effects on hydraulic conductivity of a sandy-loam soil determined by ponding infiltration runs

2017

Performing ponding infiltration runs with non-circular sources could represent a good means to sample completely an area of interest. Regardless of the shape of the source, predicting the expected reliability of the collected data by infiltrometers should facilitate soil hydraulic characterisation and also allow a more conscious use of the field data. The influence of the shape of the infiltration source (i.e., circular or square) and the analysis procedure of the steady-state infiltration data on the saturated hydraulic conductivity, Ks, of a sandy-loam soil was tested in this investigation. Circular and square surfaces sampled with the pressure infiltrometer (PI) yielded similar estimates…

Yield (engineering)infiltration source shape0208 environmental biotechnologyBioengineeringSoil science02 engineering and technologyIndustrial and Manufacturing Engineeringlcsh:AgricultureHydraulic conductivitySimplified falling head techniquesaturated soil hydraulic conductivitySettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliInfiltrometerGeotechnical engineeringlcsh:Agriculture (General)PondingMathematicssimplified falling head technique.Mechanical Engineeringlcsh:SPressure infiltrometer04 agricultural and veterinary scienceslcsh:S1-972020801 environmental engineeringVolumetric flow rateInfiltration (hydrology)LoamPressure infiltrometer. Saturated soil hydraulic conductivity. Infiltration source shape. Simplified falling head technique.Soil water040103 agronomy & agriculture0401 agriculture forestry and fisheriesJournal of Agricultural Engineering
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A field assessment of the Simplified Falling Head technique to measure the saturated soil hydraulic conductivity

2012

Abstract The Simplified Falling Head (SFH) technique to measure field saturated soil hydraulic conductivity, Kfs, has received little testing or comparison with other techniques. Different experiments were carried out to i) determine the effect of ring size on the measured conductivity; ii) compare the SFH and Pressure Infiltrometer (PI) techniques in a clay loam soil; and iii) evaluate the approach used in the SFH methodology to estimate the α* parameter. Sampling a relatively large number of sites allowed to detect statistically significant relationships between the Kfs values obtained with rings differing in diameter (0.15 and 0.30 m, respectively). The ring size effect was substantial (…

HydrologySimplified Falling Head techniqueField assessmentSoil ScienceSoil scienceField saturated soil hydraulic conductivityConductivityInfiltration (hydrology)Hydraulic conductivityLoamSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliInfiltrometerMeasurement techniqueOrder of magnitudePondingMathematicsGeoderma
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Effect of laboratory procedures on the integrity of a sandy-loam soil sample for bi-directional measurement of saturated hydraulic conductivity

2011

Practical and validated methods to measure anisotropy of saturated, Ks, or field-saturated, Kfs, soil hydraulic conductivity on a single soil sample are still lacking. The objective of this investigation was to test factors affecting anisotropy measured in a sandy-loam soil by the constant-head laboratory permeameter and the modified cube method. The ratio, RK, between the conductivity results obtained with a long (6 h) and a short (0.5 h) duration run varied from a minimum of 0.29 to a maximum of 0.88 with the considered experimental procedure, differing by both the employed constant-head device (Mariotte bottle, siphon) and the initial soil water content (unsaturated, saturated). Maximum …

Anisotropy Constant head permeameter Saturated soil hydraulic conductivitySettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestali
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INVESTIGATIONS ON INFILTRATION METHODS FOR AN IMPROVED SOIL HYDRAULIC CHARACTERIZATION

2020

Infiltration soil hydraulic properties saturated soil hydraulic conductivity surface hydrological processes BEST procedure for soil hydraulic characterization two-stage methodology height of water pouring effects soil sealing rainfall simulation beerkan infiltration experiment BEST algorithms laboratory investigation falling-head one dimensional infiltration simplified falling-head technique automatic infiltrometer Arduino parameterization of model for single-ring infiltration monitoring saturated hydraulic conductivity
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A comparison between the single ring pressure infiltrometer and simplified falling head techniques

2013

Testing the relative performances of the single ring pressure infiltrometer (PI) and simplified falling head (SFH) techniques to determine the field saturated soil hydraulic conductivity, Kfs, at the near point scale may help to better establish the usability of these techniques for interpreting and simulating hydrological processes. A sampling of 10 Sicilian sites showed that the measured Kfs was generally higher with the SFH technique than the PI one, with statistically significant differences by a factor varying from 3 to 192, depending on the site. A short experiment with the SFH technique yielded higher Kfs values because a longer experiment with the PI probably promoted short-term swe…

field saturated soil hydraulic conductivitySettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestalisimplified falling head techniquesingle ring pressure infiltrometermeasurement technique
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