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S. Eching, J. Hopmans (1993)
Optimization of Hydraulic Functions from Transient Outflow and Soil Water Pressure DataSoil Science Society of America Journal, 57
J. Parker, J. Kool, M. Genuchten (1985)
Determining Soil Hydraulic Properties from One‐step Outflow Experiments by Parameter Estimation: II. Experimental StudiesSoil Science Society of America Journal, 49
C. Fuentes, R. Haverkamp, J. Parlange (1992)
Parameter constraints on closed-form soilwater relationshipsJournal of Hydrology, 134
W. Reynolds, D. Elrick (1986)
A Method for Simultaneous In Situ Measurement in the Vadose Zone of Field‐Saturated Hydraulic Conductivity, Sorptivity and the Conductivity‐Pressure Head RelationshipGround Water Monitoring and Remediation, 6
D. Stephens, S. Neuman (1983)
Vadose zone permeability tests: unsteady flow.Journal of Hydraulic Engineering, 108
A. Toorman, P. Wierenga, R. Hills (1992)
Parameter estimation of hydraulic properties from one‐step outflow dataWater Resources Research, 28
T. Lambe (1950)
Capillary Phenomena in Cohesionless SoilsTransactions of the American Society of Civil Engineers, 116
J. Philip (1985)
APPROXIMATE ANALYSIS OF THE BOREHOLE PERMEAMETER IN UNSATURED SOILEos, Transactions American Geophysical Union, 66
Cooper Cooper, Jacob Jacob (1946)
A generalized graphical method for evaluating formation constants and summarizing well field historyEos Trans. AGU., 27
Philip Philip (1985)
Approximate analysis of the borehole permeameter in unsaturated soilWater Resour. Res., 21
D. Stephens, S. Neuman (1982)
Vadose Zone Permeability Tests: Steady State ResultsJournal of Hydraulic Engineering, 108
M. Celia, E. Bouloutas, Rebecca Zarba (1990)
A General Mass-Conservative Numerical Solution for the Unsaturated Flow EquationWater Resources Research, 26
J. Kool, J. Parker, M. Genuchten (1987)
Parameter estimation for unsaturated flow and transport models — A reviewJournal of Hydrology, 91
W. Gardner (1958)
SOME STEADY‐STATE SOLUTIONS OF THE UNSATURATED MOISTURE FLOW EQUATION WITH APPLICATION TO EVAPORATION FROM A WATER TABLESoil Science, 85
D. Russo (1988)
Determining soil hydraulic properties by parameter estimation: On the selection of a model for the hydraulic propertiesWater Resources Research, 24
J. Philip (1992)
What happens near a quasi-linear point source?Water Resources Research, 28
Van Genuchten, M. Th. (1980)
A closed-form equation for predicting the hydraulic conductivity of unsaturated soilsSoil Science Society of America Journal, 44
J. Kool, J. Parker (1988)
Analysis of the inverse problem for transient unsaturated flowWater Resources Research, 24
D. Stephens, K. Lambert, D. Watson (1987)
Regression models for hydraulic conductivity and field test of the borehole permeameterWater Resources Research, 23
C. Theis (1935)
The relation between the lowering of the Piezometric surface and the rate and duration of discharge of a well using ground‐water storageEos, Transactions American Geophysical Union, 16
Burdine Burdine (1953)
Relative permeability calculation from size distribution dataTrans. Am. Inst. Min. Metall. Pet. Eng., 198
R. Campanella (1988)
Current status of the piezocone test, 1
A. Warrick (1993)
Inverse Estimations of Soil Hydraulic Properties with Scaling: One‐Dimensional InfiltrationSoil Science Society of America Journal, 57
Mualem Mualem (1976)
A new model for predicting the hydraulic conductivity of unsaturated porous mediaWater Resour. Res., 12
J. Dam, J. Stricker, P. Droogers (1994)
Inverse method to determine soil hydraulic functions from multistep outflow experiments.Soil Science Society of America Journal, 58
D. Russo, E. Bresler, U. Shani, J. Parker (1991)
Analyses of infiltration events in relation to determining soil hydraulic properties by inverse problem methodologyWater Resources Research, 27
Lambe Lambe (1950)
Capillary phenomena in cohesionless soilsTrans. Am. Soc. Civ. Eng., Pap., 2435
Stephens Stephens, Neuman Neuman (1982)
Vadose zone permeability tests: Steady state resultsJ. Hydraul. Div. Am. Soc. Civ. Eng., 108
M. Hvorslev (1951)
Time lag and soil permeability in ground-water observations
Y. Mualem (1976)
A New Model for Predicting the Hydraulic Conductivity
Genuchten Genuchten (1980)
A closed‐form equation for predicting the hydraulic conductivity of unsaturated soilsSoil Sci. Sac. Am. J., 44
J. Dam, J. Stricker, P. Droogers (1992)
Inverse Method for Determining Soil Hydraulic Functions from One‐Step Outflow ExperimentsSoil Science Society of America Journal, 56
J. Kool, J. Parker, M. Genuchten (1985)
Determining Soil Hydraulic Properties from One-step Outflow Experiments by Parameter Estimation: I. Theory and Numerical Studies1Soil Science Society of America Journal, 49
Stephens Stephens, Neuman Neuman (1982)
Vadose zone permeability tests: Unsteady flowJ. Hydraul. Div. Am. Soc. Civ. Eng., 108
H. Cooper, C. Jacob (1946)
A generalized graphical method for evaluating formation constants and summarizing well‐field historyEos, Transactions American Geophysical Union, 27
Theis Theis (1935)
The relation between the lowering of the piezometric surface and the rate and duration of discharge of a well using groundwater storageEos Trans. AGU, 2
Reynolds Reynolds, Elrick Elrick (1986)
A method for simultaneous in situ measurement in the vadose zone of field‐saturated hydraulic conductivity and the conductivity‐pressure head relationshipGroundwater Monitor. Rev.
Dam Dam, Stricker Stricker, Droogers Droogers (1994)
Inverse method to determine soil hydraulic functions from multistep outflow experimentsSoil Sci. Sac. Am. J., 58
A cone penetrometer method for measuring hydraulic conductivity of unsaturated soils at depth is under development. Successful advancement of this method hinges on using parameter estimation to obtain hydraulic parameter values from pore water pressure and flow rate data. A finite element model is employed to predict flow responses, and objective functions describe differences between “true” and simulated responses. Contour plots in parameter space show the relative sensitivity of objective functions to field‐saturated hydraulic conductivity, Kfs, field‐saturated moisture content,θfs, and the van Genuchten hydraulic parameters, α and n. Principal curvatures and directions in parameter space describe the nature of objective functions near “true” parameter values. An objective function based on flow rate and pore water pressures does not provide better parameter sensitivity than one based on pore water pressures alone. It appears possible to obtain estimates of Kfs and α but unlikely that the other parameters will be identifiable.
Water Resources Research – Wiley
Published: Jul 1, 1996
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