The evaporation method: Extending the measurement range of soil hydraulic properties using the air-entry pressure of the ceramic cup

2010 ◽  
Vol 173 (4) ◽  
pp. 563-572 ◽  
Author(s):  
Uwe Schindler ◽  
Wolfgang Durner ◽  
G. von Unold ◽  
L. Mueller ◽  
R. Wieland
Keyword(s):  
Hydraulic Properties ◽  
Measurement Range ◽  
Soil Hydraulic Properties ◽  
Evaporation Method ◽  
Entry Pressure ◽  
Soil Hydraulic

scholarly journals Upward infiltration–evaporation method to estimate soil hydraulic properties

2017 ◽  
Vol 62 (10) ◽  
pp. 1683-1693 ◽  
Author(s):  
C. Peña-Sancho ◽  
T.A. Ghezzehei ◽  
B. Latorre ◽  
C. González-Cebollada ◽  
D. Moret-Fernández
Keyword(s):  
Hydraulic Properties ◽  
Soil Hydraulic Properties ◽  
Evaporation Method ◽  
Soil Hydraulic

scholarly journals Further tests of the HYPROP evaporation method for estimating the unsaturated soil hydraulic properties

2018 ◽  
Vol 66 (2) ◽  
pp. 161-169 ◽  
Author(s):  
Camila R. Bezerra-Coelho ◽  
Luwen Zhuang ◽  
Maria C. Barbosa ◽  
Miguel Alfaro Soto ◽  
Martinus Th. van Genuchten
Keyword(s):  
Hydraulic Conductivity ◽  
Unsaturated Soil ◽  
Hydraulic Properties ◽  
Water Retention ◽  
Measurement Techniques ◽  
Richards Equation ◽  
Water Retention Curve ◽  
Soil Hydraulic Properties ◽  
Evaporation Method ◽  
Soil Hydraulic

AbstractMany soil, hydrologic and environmental applications require information about the unsaturated soil hydraulic properties. The evaporation method has long been used for estimating the drying branches of the soil hydraulic functions. An increasingly popular version of the evaporation method is the semi-automated HYPROP©measurement system (HMS) commercialized by Decagon Devices (Pullman, WA) and UMS AG (München, Germany). Several studies were previously carried out to test the HMS methodology by using the Richards equation and the van-Genuchten-Mualem (VG) or Kosugi-Mualem soil hydraulic functions to obtain synthetic data for use in the HMS analysis, and then to compare results against the original hydraulic properties. Using HYDRUS-1D, we carried out independent tests of the HYPROP system as applied to the VG functions for a broad range of soil textures. Our results closely agreed with previous findings. Accurate estimates were especially obtained for the soil water retention curve and its parameters, at least over the range of available retention measurements. We also successfully tested a dual-porosity soil, as well as an extremely coarse medium with a very high van Genuchtennvalue. The latter case gave excellent results for water retention, but failed for the hydraulic conductivity. In many cases, especially for soils with intermediate and highnvalues, an independent estimate of the saturated hydraulic conductivity should be obtained. Overall, the HMS methodology performed extremely well and as such constitutes a much-needed addition to current soil hydraulic measurement techniques.

A modified upward infiltration method for characterizing soil hydraulic properties

2002 ◽  
Vol 66 (1) ◽  
pp. 57 ◽  
Author(s):  
M. H. Young ◽  
A. Karagunduz ◽  
J. Šimůnek ◽  
K. D. Pennell
Keyword(s):  
Hydraulic Properties ◽  
Soil Hydraulic Properties ◽  
Soil Hydraulic ◽  
Infiltration Method
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