Calibration of a catchment scale cosmic-ray probe network: A comparison of three parameterization methods

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Title:Main Title: Calibration of a catchment scale cosmic-ray probe network: A comparison of three parameterization methods
Description:Abstract: The objective of this work was to assess the accuracy of soil water content determination from neutron flux measured by cosmic-ray probes under humid climate conditions. Ten cosmic-ray probes were set up in the Rur catchment located in western Germany, and calibrated by gravimetric soil sampling campaigns. Aboveground biomass was estimated at the sites to investigate the role of vegetation cover on the neutron flux and the calibration procedure. Three parameterization methods were used to generate site-specific neutron flux - soil water content calibration curves: i) the N0-method, ii) the hydrogen molar fraction method (hmf-method), and iii) the COSMIC-method. At five locations, calibration measurements were repeated to evaluate site-specific calibration parameters obtained in two different sampling campaigns. At two locations, soil water content determined by cosmic-ray probes was evaluated with horizontally and vertically weighted soil water content measurements of two distributed in-situ soil water content sensor networks. All three methods were successfully calibrated to determine field scale soil water content continuously at the ten sites. The hmf-method and the COSMIC-method had more similar calibration curves than the N0-method. The three methods performed similarly well in the validation and errors were within the uncertainty of neutron flux measurements despite observed differences in the calibration curves and variable model complexity. In addition, we found that the obtained calibration parameters NCOSMIC, N0 and NS showed a strong correlation with aboveground biomass.
Identifier:10.1016/j.jhydrol.2014.02.026 (DOI)
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Citation Advice:Baatz, R., H. Bogena, H. J. Hendricks-Franssen, J. A. Huisman, W. Qu, C. Montzka, and H. Vereecken, 2014: Calibration of a catchment scale cosmic-ray probe network: A comparison of three parameterization methods. J Hydrol., doi: 10.1016/j.jhydrol.2014.02.026
Responsible Party
Creators:Roland Baatz (Author), Heye Bogena (Author), Harrie-Jan Hendricks-Franssen (Author), Johan A. Huisman (Author), Wie Qu (Author), Carsten Montzka (Author), Harry Vereecken (Author)
Publisher:Elsevier B.V.
Publication Year:2014
TR32 Topic:Soil
Related Subproject:C6
Subjects:Keywords: Soil Moisture, Cosmic Radiation, Vegetation
Geogr. Information Topic:Environment
File Details
Data Type:Text - Article
File Size:2.4 MB
Date:Available: 17.02.2014
Mime Type:application/pdf
Data Format:PDF
Download Permission:Only Project Members
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
Specific Information - Publication
Publication Status:Accepted
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Journal of Hydrology
Source Website:
Number of Pages:14 (1 - 14)
Metadata Details
Metadata Creator:Roland Baatz
Metadata Created:26.05.2014
Metadata Last Updated:26.05.2014
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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