Results 301 to 310 of about 188,217 (357)

Practical Issues in Imaging Hydraulic Conductivity through Hydraulic Tomography

Groundwater, 2007
Abstract Hydraulic tomography has been developed as an alternative to traditional geostatistical methods to delineate heterogeneity patterns in parameters such as hydraulic conductivity ( K ) and specific storage ( S s
Walter A, Illman, Andrew J, Craig, Xiaoyi, Liu   +2 more
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Hydraulic Conductivity Of Rockfill

Journal of Hydraulic Research, 1978
Dimensionless equations for the hydraulic conductivity of crushed rock and river gravel have been developed on the basis of approximately 1250 permeameter tests. Experimental data of a number of researches were used in the correlations. Grain sizes varied from .55 to .79 mm and pore Reynolds numbers were in the range of .001 to 20,000.
John A. Mccorquodale, Abdel-Alim A. Hannoura, M. Sam Nasser   +2 more
openaire   +1 more source

DEPTH DEPENDENT HYDRAULIC CONDUCTIVITY

Soil Science, 1970
THE VOID RATIOS OF SOILS DEPEND UPON THE CONSOLIDATION PRESSURE, AND HENCE IT IS EXPECTED THAT WITHIN A GIVEN FORMATION THE VOID RATIO GENERALLY DECREASES WITH DEPTH. ANALYTICAL EXPRESSIONS FOR AVERAGE HORIZONTAL AND VERTICAL HYDRAULIC CONDUCTIVITY AND THE HYDRAULIC CONDUCTIVITY RATIO AS A FUNCTION OF AVERAGE VOID RATIO FO A NONHOMOGENEOUS ISOTROPIC ...
P. BASAK, M. ANANDAKRISHNAN
openaire   +1 more source

Hydraulic Conductivity Assessment

2009
From the hydraulic point of view, rock masses are heterogeneous, anisotropous and discontinuous media. As water flow in rocks occurs mainly along discontinuities, the exact knowledge of their distribution and their characteristic parameters is fundamental to finding the features that describe the fluid flow, in particular, as far as the hydraulic ...
Laura Scesi, Paola Gattinoni
openaire   +1 more source

Hydraulic conductivity of ischemic pulmonary venules

American Journal of Physiology-Lung Cellular and Molecular Physiology, 1993
We report the first determination of lung endothelial barrier properties in ischemic, nonreperfused microvessels. We quantified the endothelial barrier in terms of hydraulic conductivity (Lp) in single pulmonary venules (diameter 20–50 microns) of isolated blood perfused lungs (dog, rat), held at constant inflation pressure (5 cmH2O) with a gas ...
R L, Qiao, R, Sadurski, J, Bhattacharya
openaire   +2 more sources

Hydraulic Conductivity Prediction for Sandy Soils

Groundwater, 2004
Abstract The potential for petroleum‐contaminated soils to impact ground water is evaluated using the soil leachability model in South Carolina and Georgia. In this model, the Green and Ampt (1911) equation is used to estimate unsat‐urated flow with saturated hydraulic conductivity (
Amy E, Cronican, Molly M, Gribb
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Dentin Permeability: Determinants of Hydraulic Conductance

Journal of Dental Research, 1978
A technique is described which permits measurement of the ease with which fluid permeates dentin. This value, the hydraulic conductance of dentin, increased as surface area increases and/or as dentin thickness decreases. It increased 32-fold when dentin was acid etched due to removal of surface debris occluding the tubules.
O W, Reeder, R E, Walton, M J, Livingston, D H, Pashley   +3 more
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Multiple Parameterization for Hydraulic Conductivity Identification

Groundwater, 2008
Abstract Hydraulic conductivity identification remains a challenging inverse problem in ground water modeling because of the inherent nonuniqueness and lack of flexibility in parameterization methods. This study introduces maximum weighted log‐likelihood estimation (MWLLE) along with multiple generalized parameterization (GP) methods ...
Frank T-C, Tsai, Xiaobao, Li
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Interstitial hydraulic conductivity in a fibrosarcoma

American Journal of Physiology-Heart and Circulatory Physiology, 2000
Convective transport of therapeutic agents in solid tumors can be improved through intratumoral infusion. To optimize the convection, we investigated the dependence of the hydraulic conductivity on tissue deformation induced by interstitial fluid pressure gradient during the infusion.
X Y, Zhang, J, Luck, M W, Dewhirst, F, Yuan   +3 more
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Upscaling hydraulic conductivity: theory and examples from geohydrological studies

Nutrient Cycling in Agroecosystems, 1998
This paper presents an overview of the theory of upscaling hydraulic conductivity and describes two cases studies in which some of this theory has been applied. Three representative hydraulic conductivity of a numerical model block ('block conductivity' for short) is defined in terms of smaller scale hydraulic conductivities.
Bierkens, M.F.P., van der Gaast, J.W.J.
openaire   +2 more sources