Field-Obtained Soil Water Characteristic Curves and Hydraulic Conductivity Functions

نویسندگان
چکیده

منابع مشابه

simultaneous scaling of soil water retention and hydraulic conductivity functions

abstract scaling methods, which are based on similar media theory, are used to simplify the statistic description of soil spatial variations. to simulate the water flow in heterogeneous soils, simultaneous scaling of soil hydraulic functions, including soil water retention and unsaturated hydraulic conductivity functions, is highly desirable. in the similar media theory, the simultaneous scalin...

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Estimating Relative Hydraulic Conductivity from the Water Release Characteristic of a Shrinking Clay Soil

To understand the hydraulic properties of soils, accurate prediction of unsaturated hydraulic conductivity is needed which is commonly derived from the soil water release characteristic. In fine-textured soils the modified Mualem-van Genuchten (MMVG) function has been used extensively to predict the change in relative conductivity with changes in matric potential, but this assumes that the soil...

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In-situ Field Hydraulic Conductivity

Hydraulic conductivity is commonly estimated from grain size characteristics of unconsolidated sediments. We present an extensive set of air-permeability and grain size measurements from a heterogeneous aquifer. These data are unique in that the hydraulic conductivity measurements are made on undisturbed in-situ sediment and, like the grain size measurements, have a small sample volume size (<1...

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Computer Erosion Modeling Considering Soil Hydraulic Conductivity

Improved computer models of erosion have been developed, considering soil hydraulic conductivity. The models deal with erosion of levees, dams and embankments due to overtopping. The simulations trace the formation of rills and gullies, beginning with initial overtopping and continuing to final breaching. Physical models performed at 1-g and high g using a geotechnical centrifuge have been used...

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ژورنال

عنوان ژورنال: Journal of Irrigation and Drainage Engineering

سال: 2018

ISSN: 0733-9437,1943-4774

DOI: 10.1061/(asce)ir.1943-4774.0001272