Temporal stability of soil water content as affected by soil hydraulic parameters
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| Title: | Main Title: Temporal stability of soil water content as affected by soil hydraulic parameters |
| Description: | Abstract: The knowledge of temporal stability of soil water content is useful for the development of ground truthing strategies of remote sensing data and hydrological modeling. For this study we employed the wireless sensor network SoilNet developed by the Forschungszentrum Jülich to detect high resolution soil water content pattern of a grassland headwater catchment in Western Germany within the framework of the TERENO initiative. Soil water content was measured using newly developed time domain transmission sensors, which were installed in three depths (5, 20 and 50 cm). The mean relative difference is currently the principal tool for temporal stability analysis, which is computed by the individual measurements of soil water content at different locations in time. Sensor locations with a small mean relative difference provide a good estimation of the areal average of soil water content, whereas a small standard deviation indicates a great tendency of being temporally stable. This study showed that several locations for each depth are temporally stable but no location was found where all depths are equally temporal stable. To test the effect of hydraulic parameters on the temporal stability, the inverse model based on the observed large time scale dataset and under natural boundary conditions was used. The results show that the model fit the measurements well, and we found that with increasing saturated soil hydraulic conductivity, the mean relative difference is decreasing. These findings are of relevance for applications of geospatial surface soil water content assimilation in hydrologic modeling when only point-scale observations are available, as well as, remotely sensing surface soil water content calibration and validation studies. |
Responsible Party
| Creator: | Wie Qu (Author) |
| Publisher: | CRC/TR32 Database (TR32DB) |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Other |
| Related Subproject: | C1 |
| Subject: | Keyword: PhD Report |
File Details
| Filename: | Report4_Qu_2012.pdf |
| Data Type: | Text - Text |
| File Size: | 1.2 MB |
| Date: | Available: 01.10.2012 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| 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 |
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Specific Information - Report
| Report Date: | 1st of October, 2012 |
| Report Type: | PhD Report |
| Report City: | Jülich, Germany |
| Report Institution: | Institute of Bio and Geosciences Agrosphere (IBG-3), Research Center Jülich |
| Number of Pages: | 24 (1 - 24) |
| Further Information: | TR 32 Student Report Phase II |
Metadata Details
| Metadata Creator: | Wei Qu |
| Metadata Created: | 04.12.2013 |
| Metadata Last Updated: | 04.12.2013 |
| Subproject: | C1 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 667 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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