Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloPractical Data Products From Cosmic-Ray Neutron Sensing for Hydrological Applications
Anno di pubblicazione2020
Autore/iFranz, T., Wahbi, A., Zhang, J., Vreugdenhil, M., Heng, L., Dercon, G., Strauss, P., Brocca, L., Wagner, W.
Affiliazioni autori1School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, United States 2Soil and Water Management & Crop Nutrition Subprogramme, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency (IAEA), Vienna, Austria 3Arid Land Research Center, Tottori University, Tottori, Japan 4College of Land Science and Technology, China Agricultural University, Beijing, China 5Centre for Water Resource Systems, Vienna University of Technology (TU Wien), Vienna, Austria 6Department of Geodesy and Geoinformation, Vienna University of Technology (TU Wien), Vienna, Austria 7Federal Agency for Water Management, Institute for Land and Water Management Research, Petzenkirchen, Austria 8National Research Council, Research Institute for Geo-Hydrological Protection, Perugia, Italy
Autori CNR e affiliazioni
  • inglese
AbstractThe Cosmic-Ray Neutron Sensor (CRNS) technique for estimating landscape average soil water content (SWC) is now a decade old and includes many practical methods for implementing measurements, such as identification of detection area and depth and determining crop biomass water equivalent. However, in order to maximize the societal relevance of CRNS SWC data, practical value-added products need to be developed that can estimate both water flux (i.e., rainfall, deep percolation, evapotranspiration) and root zone SWC changes. In particular, simple methods that can be used to estimate daily values at landscape average scales are needed by decision makers and stakeholders interested in utilizing this technique. Moreover, landscape average values are necessary for better comparisons with remote sensing products. In this work we utilize three well-established algorithms to enhance the usability of the CRNS data. The algorithms aim to: (1) temporally smooth the neutron intensity and SWC time series, (2) estimate a daily rainfall product using the Soil Moisture 2 Rain (SM2RAIN) algorithm, and (3) estimate daily root zone SWC using an exponential filter algorithm. The algorithms are tested on the CRNS site at the Hydrological Open Air Laboratory experiment in Petzenkirchen, Austria over a 3 years period. Independent observations of rainfall and point SWC data are used to calibrate the algorithms. With respect to the neutron filter, we found the Savitzky-Golay (SG) had the best results in preserving the amplitude and timing of the SWC response to rainfall as compared to the Moving Average (MA), which shifted the SWC peak by 2-4 h. With respect to daily rainfall using the SM2RAIN algorithm, we found the MA and SG filters had similar results for a range of temporal windows (3-13 h) with cumulative errors of <9% against the observations. With respect to daily root zone SWC, we found all filters behaved well (Kling-Gupta-Efficiency criteria > 0.9). A methodological framework is presented that summarizes the different processes, required data, algorithms, and products.
Lingua abstractinglese
Altro abstract-
Lingua altro abstract-
Pagine da2
Pagine a9
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RivistaFrontiers (Los Angel. Calif.)
Attiva dal 1982
Editore: Frontiers, - Los Angeles, CA
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 1526-1972
Titolo chiave: Frontiers (Los Angel. Calif.)
Titolo proprio: Frontiers. (Los Angel. Calif.)
Titolo abbreviato: Frontiers (Los Angel. Calif.)
Titolo alternativo: Frontiers newsmagazine (Los Angel. Calif.)
Numero volume della rivista-
Fascicolo della rivista-
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)-
Parole chiaveSM2RAIN, soil moisture, cosmic ray
Link (URL, URI)-
Titolo parallelo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR
  • DTA.AD003.164.001 : Studio e monitoraggio dei processi idrologici
Progetti Europei-