Search results for " simplified falling head technique"

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A Plot-scale uncertainty analysis of saturated hydraulic conductivity of a clay soil

2021

Abstract Simulating soil hydrological processes at the plot or field scale requires using spatially representative values of the saturated soil hydraulic conductivity, Ks. Sampling campaigns should yield a reliable mean of Ks with a sustainable workload since measuring Ks at many points is challenging. Uncertainty analysis can be used to determine the lowest number of measurements that yield a mean Ks value with a specified accuracy level. Potential and limitations of this analysis were tested in this investigation for different extents of the sampled area and sampling densities. A clay soil was sampled intensively on two plots (plot area = 44 m2), two dates and using both small (0.15 m in …

010504 meteorology & atmospheric sciencesScale (ratio)0207 environmental engineeringbootstrap methodSampling (statistics)Soil science02 engineering and technology01 natural sciencesConfidence intervalHydraulic conductivitysaturated soil hydraulic conductivityEnvironmental scienceSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestalifine-textured soilsFine-textured soilsimplified falling head technique020701 environmental engineeringClay soilUncertainty analysissaturated soil hydraulic conductivity fine-textured soils simplified falling head technique bootstrap method0105 earth and related environmental sciencesWater Science and Technology
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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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