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: | |
| Language: | English |
| Status: | Completed |
Constraints
| 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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| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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