Unsaturated Flow Induced by Evaporation and Transpiration

1989 ◽  
pp. 221-240
Author(s):  
P. C. D. Milly
Keyword(s):  
Unsaturated Flow

Parameter Determination for Chloride and Tritium Transport in Undisturbed Lysimeters during Steady Flow

1992 ◽  
Vol 23 (2) ◽  
pp. 89-104 ◽  
Author(s):  
Ole H. Jacobsen ◽  
Feike J. Leij ◽  
Martinus Th. van Genuchten
Keyword(s):  
Experimental Data ◽  
Unsaturated Flow ◽  
Transport Model ◽  
Time Moment ◽  
Breakthrough Curves ◽  
Coarse Sand ◽  
Retardation Factor ◽  
Parameter Determination ◽  
Model Parameters ◽  
Water Fraction

Breakthrough curves of Cl and 3H2O were obtained during steady unsaturated flow in five lysimeters containing an undisturbed coarse sand (Orthic Haplohumod). The experimental data were analyzed in terms of the classical two-parameter convection-dispersion equation and a four-parameter two-region type physical nonequilibrium solute transport model. Model parameters were obtained by both curve fitting and time moment analysis. The four-parameter model provided a much better fit to the data for three soil columns, but performed only slightly better for the two remaining columns. The retardation factor for Cl was about 10 % less than for 3H2O, indicating some anion exclusion. For the four-parameter model the average immobile water fraction was 0.14 and the Peclet numbers of the mobile region varied between 50 and 200. Time moments analysis proved to be a useful tool for quantifying the break through curve (BTC) although the moments were found to be sensitive to experimental scattering in the measured data at larger times. Also, fitted parameters described the experimental data better than moment generated parameter values.

Transient unsaturated flow in the drainage layer of a highway: solution and drainage performance

2017 ◽  
Vol 20 (3) ◽  
pp. 528-553 ◽  
Author(s):  
Han-Cheng Dan ◽  
Zhi Zhang ◽  
Xiang Liu ◽  
Jia-Qi Chen
Keyword(s):  
Unsaturated Flow ◽  
Drainage Layer

Bacteria Transport and Deposition under Unsaturated Flow Conditions: The Role of Water Content and Bacteria Surface Hydrophobicity

2008 ◽  
Vol 7 (2) ◽  
pp. 406-419 ◽  
Author(s):  
G. Gargiulo ◽  
S. A. Bradford ◽  
J. Simunek ◽  
P. Ustohal ◽  
H. Vereecken ◽  
...  
Keyword(s):  
Water Content ◽  
Unsaturated Flow ◽  
Surface Hydrophobicity ◽  
Flow Conditions ◽  
Bacteria Transport

Parameter estimation for coupled unsaturated flow and transport

1989 ◽  
Vol 25 (3) ◽  
pp. 385-396 ◽  
Author(s):  
S. Mishra ◽  
J. C. Parker
Keyword(s):  
Parameter Estimation ◽  
Unsaturated Flow ◽  
Flow And Transport

Unsaturated flow properties used to predict outflow and evapotranspiration from a sloping lysimeter

1973 ◽  
Vol 9 (6) ◽  
pp. 1645-1655 ◽  
Author(s):  
David G. Scholl ◽  
Alden R. Hibbert
Keyword(s):  
Unsaturated Flow ◽  
Flow Properties

scholarly journals An active fracture model for unsaturated flow and transport in fractured rocks

1998 ◽  
Vol 34 (10) ◽  
pp. 2633-2646 ◽  
Author(s):  
H. H. Liu ◽  
C. Doughty ◽  
G. S. Bodvarsson
Keyword(s):  
Fractured Rocks ◽  
Unsaturated Flow ◽  
Fracture Model ◽  
Flow And Transport ◽  
Active Fracture
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