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

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Title:Main Title: Estimating soil hydraulic properties from infra-red measurements of soil surface temperatures and TDR data
Description: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:10.2136/vzj2009.0176 (DOI)
Responsible Party
Creators:Christian Steenpass (Author), Jan Vanderborght (Author), Michael Herbst (Author), Jirka Simunek (Author), Harry Vereecken (Author)
Publisher:Soil Science Society of America
Publication Year:2013
Topic
TR32 Topic:Soil
Related Subproject:B4
Subjects:Keywords: TDR, Soil Water Content
File Details
Filename:2010_Steenpass_VZJ.pdf
Data Type:Text - Article
Size:15 Pages
File Size:4 MB
Date:Issued: 20.10.2010
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:[TR32DB] Data policy agreement
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Specific Information - Publication
Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Vadose Zone Journal
Source Website:www.soils.org
Issue:4
Volume:9
Number of Pages:15 (910 - 924)
Metadata Details
Metadata Creator:Christian Steenpass
Metadata Created:02.12.2013
Metadata Last Updated:02.12.2013
Subproject:B4
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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