[870] - Accuracy of the cosmic-ray soil water content probe in humid forest ecosystems: The worst case scenario

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Bogena, H., Huisman, J. A., Baatz, R., Hendricks-Franssen, H., Vereecken, H., 2013. Accuracy of the cosmic-ray soil water content probe in humid forest ecosystems: The worst case scenario. Water Resources Research, 49 (9), 5778 - 5791. DOI: 10.1002/wrcr.20463.
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Title(s):Main Title: Accuracy of the cosmic-ray soil water content probe in humid forest ecosystems: The worst case scenario
Description(s):Abstract: Soil water content is one of the key state variables in the soil-vegetation-atmosphere continuum due to its important role in the exchange of water and energy at the soil surface. A new promising method to measure integral soil water content at the field or small catchment scale is the cosmic-ray probe (CRP). Recent studies of CRP measurements have mainly presented results from test sites located in very dry areas and from agricultural fields with sandy soils. In this study, distributed continuous soil water content measurements from a wireless sensor network (SoilNet) were used to investigate the accuracy of CRP measurements for soil water content determination in a humid forest ecosystem. Such ecosystems are less favorable for CRP applications due to the presence of a litter layer. In addition, lattice water and carbohydrates of soil organic matter and belowground biomass reduce the effective sensor depth and thus were accounted for in the calibration of the CRP. The hydrogen located in the biomass decreased the level of neutron count rates and thus also decreased the sensitivity of the cosmic-ray probe, which in turn resulted in an increase of the measurement uncertainty.This uncertainty was compensated by using longer integration times (e.g., 24 h). For the Wuestebach forest site, the cosmic-ray probe enabled the assessment of integral daily soil water content dynamics with a RMSE of about 0.03 cm3/cm3 without explicitly considering the litter layer. By including simulated water contents of the litter layer in the calibration, a better accuracy could be achieved.
Identifier(s):DOI: 10.1002/wrcr.20463
Citation Advice:Bogena, H. R., J. A. Huisman, R. Baatz, H. J. H. Franssen, and H. Vereecken, 2013: Accuracy of the cosmic-ray soil water content probe in humid forest ecosystems: The worst case scenario. Water Resour Res, ,doi: 10.1002/wrcr.20463, 49, 5778-5791.
Responsible Party
Creator(s):Author: Heye Bogena
Author: Johan A. Huisman
Author: Roland Baatz
Author: Harrie-Jan Hendricks-Franssen
Author: Harry Vereecken
Publisher:Elsevier B.V.
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Soil Moisture, Cosmic Radiation, Vegetation
Topic Category:Environment
File Details
File Name:BogenaEtAl_2013_wrcr20463.pdf
Data Type:Text
File Size:5334 kB (5.209 MB)
Date(s):Available: 2013-09-13
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
Download Information:Accepted Manuscript
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
North:-no map data
Measurement Region:Erkensruhr
Measurement Location:Wüstebach
Specific Informations - Publication
Article Type:Journal
Source:Water Resources Research
Number Of Pages:14
Page Range:5778 - 5791
Metadata Details
Metadata Creator:Roland Baatz
Metadata Created:2014-05-26
Metadata Last Updated:2014-05-26
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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Metadata Downloads:0
Dataset Downloads:6
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