Simplified Multistep Outflow Method to Estimate Unsaturated Hydraulic Functions for Coarse-Textured Soils

2011 ◽  
Vol 75 (2) ◽  
pp. 418-425 ◽  
Author(s):  
Paolo Nasta ◽  
Sylvie Huynh ◽  
Jan W. Hopmans
Keyword(s):  
Multistep Outflow

Multistep outflow experiments to derive a soil hydraulic database for forest soils

2009 ◽  
Vol 60 (5) ◽  
pp. 792-806 ◽  
Author(s):  
H. Puhlmann ◽  
K. Von Wilpert ◽  
M. Lukes ◽  
W. Dröge
Keyword(s):  
Forest Soils ◽  
Soil Hydraulic ◽  
Multistep Outflow

scholarly journals Variability of topsoil hydraulic conductivity along the hillslope transects delineated in four areas strongly affected by soil erosion

2021 ◽  
Vol 69 (2) ◽  
pp. 220-231
Author(s):  
Antonín Nikodem ◽  
Radka Kodešová ◽  
Miroslav Fér ◽  
Aleš Klement
Keyword(s):  
Main Parameter ◽  
Water Retention ◽  
Sandy Loam ◽  
Pressure Head ◽  
Water Retention Curve ◽  
Soil Water Retention Curve ◽  
Soil Water Retention ◽  
Retention Curve ◽  
Multistep Outflow ◽  
Guelph Permeameter

Abstract Soil hydraulic conductivities of topsoils were studied at 5 points of the hillslope transects delineated at 4 geomorphologically diverse areas, where the original soil types (Chernozem, Luvisol and two Cambisols) were due to erosion transformed into different soil unites. Hydraulic conductivities of saturated soils and for a pressure head of –2 cm were measured directly in the field using a Guelph permeameter (K s,GP ) and mini disk tension infiltrometer (K h=– 2 ,MDI ), and in the laboratory using a multistep outflow method (K s,MSO , K h= – 2 ,MSO ). While K s,GP ≈ K s,MSO in the Chernozem and Cambisol (sandy loam) regions, and K s,GP < K s,MSO in the Luvisol and Cambisol (loam) regions. The K s values obtained using different methods showed different trends along the hillslope transects. The K h= – 2 values obtained using different methods showed similar trends along the transects in the Chernozem and Luvisol regions. These trends could be explained by the position within the transects (i.e., different stages of erosion/accumulation processes). No relationships were found between the K h=– 2 values in the Cambisol regions. The pressure head at an inflection point of the a soil-water retention curve was the main parameter, which appeared to associate (negative correlation) with K h=– 2 and K s,MSO in the Chernozem and Luvisol regions.

EVALUATION OF THE MULTISTEP OUTFLOW METHOD FOR THE DETERMINATION OF UNSATURATED HYDRAULIC PROPERTIES OF SOILS

Soil Science ◽  
1997 ◽  
Vol 162 (9) ◽  
pp. 618-631 ◽  
Author(s):  
H. Vereecken ◽  
R. Kaiser ◽  
M. Dust ◽  
T. Pütz
Keyword(s):  
Hydraulic Properties ◽  
Multistep Outflow

Neural Networks Prediction of Soil Hydraulic Functions for Alluvial Soils Using Multistep Outflow Data

2004 ◽  
Vol 68 (2) ◽  
pp. 417 ◽  
Author(s):  
B. Minasny ◽  
J. W. Hopmans ◽  
T. Harter ◽  
S. O. Eching ◽  
A. Tuli ◽  
...  
Keyword(s):  
Neural Networks ◽  
Alluvial Soils ◽  
Soil Hydraulic ◽  
Multistep Outflow

Multistep Outflow Experiments to Determine Soil Physical and Carbon Dioxide Production Parameters

2009 ◽  
Vol 8 (3) ◽  
pp. 772-782 ◽  
Author(s):  
L. Weihermüller ◽  
J. A. Huisman ◽  
A. Graf ◽  
M. Herbst ◽  
J.-M. Sequaris
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Production ◽  
Production Parameters ◽  
Multistep Outflow

Design of a User-Friendly Automated Multistep Outflow Apparatus

2009 ◽  
Vol 8 (2) ◽  
pp. 523-529 ◽  
Author(s):  
Jordi Figueras ◽  
Molly M. Gribb
Keyword(s):  
Multistep Outflow ◽  
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