Predicting subgrid variability of soil water content from basic soil information
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| Title: | Main Title: Predicting subgrid variability of soil water content from basic soil information |
| Description: | Abstract: Knowledge of unresolved soil water content variability within model grid cells (i.e., subgrid variability) is impor tant for accurate predic tions of land-surface energy and hydrologic fluxes. Here we derived a closed-form expression to describe how soil water content variability depends on mean soil water content (σθ(<θ>)) using stochastic analysis of 1-D unsaturat ed gravitational flow based on the van Genuchten-Mualem (VGM) model. A sensitivity analysis showed that the n parameter strongly influenced both the shape and magnitude of the maximum of σθ(<θ>). The closed- form express ion was used to predict σθ(<θ>) f or eight data sets with varying soil tex ture using VGM parameters obtained from pedotransfer f unctions that rely on available soil information. Generally, there was good agreement between obser ved and predicted σθ(<θ>) despite the obvious simplifications that were used to derive the closed-form expression. Fur thermore, the novel clos ed-form expression was successfully used to inversely estimate the variability of hydraulic proper ties from obser ved σθ(<θ>) data. |
| Identifier: | 10.1002/ 2014GL062496 (DOI) |
| Citation Advice: | Qu, W., H. R. Bogena, J. A. Huisman, J. Vanderborght, M. Schuh, E. Priesack, and H. Vereecken (2015), Predicting subgrid variability of soil water content from basic soil information, Geophys. Res. Lett., 42, 789–796, doi:10.1002/2014GL062496. |
Responsible Party
| Creators: | Wie Qu (Author), Heye Bogena (Author), Johan A. Huisman (Author), Jan Vanderborght (Author), Max Schuh (Author), Erwin Priesack (Author), Harry Vereecken (Author) |
| Publisher: | AGU Publications |
| Publication Year: | 2017 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | C1 |
| Subject: | Keyword: Hydrological Modelling |
File Details
| Filename: | Qu2015.pdf |
| Data Type: | Text - Article |
| File Size: | 495 KB |
| Date: | Available: 11.01.2015 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| General Access and Use Conditions: | According to the TR32DB data policy agreement. |
| Access Limitations: | According to the TR32DB data policy agreement. |
| Licence: | [TR32DB] Data policy agreement |
Geographic
Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Geophysical Research Letters |
| Number of Pages: | 8 (789 - 796) |
Metadata Details
| Metadata Creator: | Michael Stockinger |
| Metadata Created: | 30.05.2017 |
| Metadata Last Updated: | 30.05.2017 |
| Subproject: | C1 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 752 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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