GSTDTAP  > 资源环境科学
DOI10.1029/2018WR022692
Cosmic Ray Neutron Sensing for Simultaneous Soil Water Content and Biomass Quantification in Drought Conditions
Jakobi, J.1; Huisman, J. A.1; Vereecken, H.1; Diekkrueger, B.2; Bogena, H. R.1
2018-10-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2018
卷号54期号:10页码:7383-7402
文章类型Article
语种英语
国家Germany
英文摘要

Understanding the feedback mechanisms between soil water content (SWC) and biomass production is important for sustainable resources management. Here we present a new method enabling simultaneous noninvasive measurements of SWC and biomass dynamics based on cosmic ray neutron sensing (CRNS). Recently, it was suggested that the neutron ratio (N-r) between thermal neutron (TN) and fast neutron (FN) intensity contains information on other hydrogen pools like vegetation, canopy interception, and snow. The aim of this study is to evaluate the accuracy of simultaneous measurements of SWC and biomass dynamics during agricultural drought conditions using CRNS probes. To this end, we instrumented an arable field cropped with sugar beet with CRNS probes and a wireless in situ SWC sensor network. Belowground and aboveground biomass were sampled in monthly intervals. We found a linear relationship between N-r and the aboveground biomass that allowed to continuously quantify the dry aboveground biomass development throughout the growing season with a root-mean-square error from 0.14 to 0.22 kg/m(2). This information was used together with measured belowground biomass to correct for the effect of biomass on SWC determination with CRNS probes, which increased the accuracy of the SWC estimates considerably as indicated by the decrease of the root-mean-square error from 0.046 to 0.013 cm(3)/cm(3). We anticipate that future research on the N-r can further improve the accuracy of SWC and biomass estimates and extend the application of CRNS to include canopy interception, ponding water, and snow water equivalent estimation for both stationary and roving CRNS systems.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000450726000016
WOS关键词UNIVERSAL CALIBRATION FUNCTION ; CATCHMENT SCALE ; FIELD-SCALE ; VEGETATION INDEXES ; MOISTURE ; NETWORK ; EVAPOTRANSPIRATION ; VALIDATION ; DYNAMICS ; PATTERNS
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/21749
专题资源环境科学
作者单位1.Forschungszentrum Julich, Agrosphere Inst IBG 3, Julich, Germany;
2.Univ Bonn, Dept Geog, Bonn, Germany
推荐引用方式
GB/T 7714
Jakobi, J.,Huisman, J. A.,Vereecken, H.,et al. Cosmic Ray Neutron Sensing for Simultaneous Soil Water Content and Biomass Quantification in Drought Conditions[J]. WATER RESOURCES RESEARCH,2018,54(10):7383-7402.
APA Jakobi, J.,Huisman, J. A.,Vereecken, H.,Diekkrueger, B.,&Bogena, H. R..(2018).Cosmic Ray Neutron Sensing for Simultaneous Soil Water Content and Biomass Quantification in Drought Conditions.WATER RESOURCES RESEARCH,54(10),7383-7402.
MLA Jakobi, J.,et al."Cosmic Ray Neutron Sensing for Simultaneous Soil Water Content and Biomass Quantification in Drought Conditions".WATER RESOURCES RESEARCH 54.10(2018):7383-7402.
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