[582] - Temporal stability of soil water content as affected by soil hydraulic parameters

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Qu, W., 2012. Temporal stability of soil water content as affected by soil hydraulic parameters. PhD Report, Institute of Bio and Geosciences Agrosphere (IBG-3), Research Center Jülich, Jülich, Germany. Accessed from https://www.tr32db.uni-koeln.de/data.php?dataID=582 at 2020-04-05.
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Title(s):Main Title: Temporal stability of soil water content as affected by soil hydraulic parameters
Description(s):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(s):Author: Wie Qu
Publisher:CRC/TR32 Database (TR32DB)
TR32 Topic:Other
Subject(s):CRC/TR32 Keywords: PhD Report
File Details
File Name:Report4_Qu_2012.pdf
Data Type:Text
File Size:1200 kB (1.172 MB)
Date(s):Available: 2012-10-01
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
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
Measurement Region:Kall
Measurement Location:Rollesbroich
Specific Informations - 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
Period of Pages:1 - 24
Further Informations:TR 32 Student Report Phase II
Metadata Details
Metadata Creator:Wei Qu
Metadata Created:2013-12-04
Metadata Last Updated:2013-12-04
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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