TR32-Database: Database of Transregio 32

[660] - Estimating soil hydraulic properties from infra-red measurements of soil surface temperatures and TDR data

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Steenpass, C., Vanderborght, J., Herbst, M., Simunek, J., Vereecken, H., 2010. Estimating soil hydraulic properties from infra-red measurements of soil surface temperatures and TDR data. Vadose Zone Journal, 9 (4), 910 - 924. DOI: 10.2136/vzj2009.0176.
Title(s):Main Title: Estimating soil hydraulic properties from infra-red measurements of soil surface temperatures and TDR data
Description(s):Abstract: The spatiotemporal development of soil surface temperatures (SST) depends on water availability in the near-surface soil layer. Since the soil loses latent heat during evaporation and water available for evaporation depends on soil hydraulic properties (SHP), the temporal variability of SST should contain information about the near-surface SHP. The objective of this study was to investigate the uncertainties of SHP derived from SST. HYDRUS-1D coupled with a global optimizer (DREAM) was used to inversely estimate van Genuchten-Mualem parameters from infra-red measured SST and TDR-measured water contents. This approach was tested using synthetic and real data, collected during September 2008 from a harrowed silty-loam field plot in Selhausen, Germany. The synthetic data illustrated that SHP can be derived from SST and that additional soil water content measurements reduce the uncertainty of estimated SHP. Unlike for the synthetic experiment with a vertically homogeneous soil profile, a layered soil profile had to be assumed to derive SHP from the real data. Therefore, the uncertainty of SHP derived from real data was considerably larger. Water retention curves of undisturbed soil cores were similar to those estimated from SST and TDR data for the deeper undisturbed soil. The retention curves derived from SST and TDR data for the harrowed top soil layer were typical for a coarse textured soil and deviated considerably from the retention curves of soil cores, which were typical for a fine textured soil and similar to those from the subsoil.
Identifier(s):DOI: 10.2136/vzj2009.0176
Responsible Party
Creator(s):Author: Christian Steenpass
Author: Jan Vanderborght
Author: Michael Herbst
Author: Jirka Simunek
Author: Harry Vereecken
Publisher:Soil Science Society of America
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: TDR, Soil Water Content
File Details
File Name:2010_Steenpass_VZJ.pdf
Data Type:Text
Size(s):15 Pages
File Size:4096 kB (4 MB)
Date(s):Issued: 2010-10-20
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:Ellebach
Measurement Location:Selhausen
Specific Informations - Publication
Article Type:Journal
Source:Vadose Zone Journal
Number Of Pages:15
Page Range:910 - 924
Metadata Details
Metadata Creator:Christian Steenpass
Metadata Created:2013-12-02
Metadata Last Updated:2013-12-02
Funding Phase:1
Metadata Language:English
Metadata Version:V40
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