DOI: 10.5194/hess-21-495-2017
Scopus记录号: 2-s2.0-85010716292
论文题名: Repeated electromagnetic induction measurements for mapping soil moisture at the field scale: Validation with data from a wireless soil moisture monitoring network
作者: Martini E ; , Werban U ; , Zacharias S ; , Pohle M ; , Dietrich P ; , Wollschläger U
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 1 起始页码: 495
结束页码: 513
语种: 英语
Scopus关键词: Complex networks
; Electric conductivity
; Electromagnetic induction
; Mapping
; Moisture
; Moisture control
; Soil moisture
; Soils
; Apparent electrical conductivity
; Electrical conductivity
; Electromagnetic inductions (EMI)
; EMI measurements
; Site characteristics
; Soil moisture monitoring
; Temporal variability
; Temporal variation
; Soil surveys
; clay soil
; electrical conductivity
; electromagnetic method
; field method
; hillslope
; imaging method
; mapping method
; model validation
; monitoring system
; soil moisture
; soil temperature
英文摘要: Electromagnetic induction (EMI) measurements are widely used for soil mapping, as they allow fast and relatively low-cost surveys of soil apparent electrical conductivity (ECa). Although the use of non-invasive EMI for imaging spatial soil properties is very attractive, the dependence of ECa on several factors challenges any interpretation with respect to individual soil properties or states such as soil moisture (θ). The major aim of this study was to further investigate the potential of repeated EMI measurements to map θ, with particular focus on the temporal variability of the spatial patterns of ECa and θ. To this end, we compared repeated EMI measurements with high-resolution θ data from a wireless soil moisture and soil temperature monitoring network for an extensively managed hillslope area for which soil properties and θ dynamics are known. For the investigated site, (i) ECa showed small temporal variations whereas θ varied from very dry to almost saturation, (ii) temporal changes of the spatial pattern of ECa differed from those of the spatial pattern of θ, and (iii) the ECa–θ relationship varied with time. Results suggest that (i) depending upon site characteristics, stable soil properties can be the major control of ECa measured with EMI, and (ii) for soils with low clay content, the influence of θ on ECa may be confounded by changes of the electrical conductivity of the soil solution. Further, this study discusses the complex interplay between factors controlling ECa and θ, and the use of EMI-based ECa data with respect to hydrological applications. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79281
Appears in Collections: 气候变化事实与影响
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作者单位: Dept. Monitoring and Exploration Technologies, UFZ - Helmholtz Centre for Environmental Research, Permoserstraße 15, Leipzig, Germany; Centre for Applied Geoscience, University of Tübingen, Hölderlinstraße 12, Tübingen, Germany; Dept. Soil Physics, UFZ - Helmholtz Centre for Environmental Research, Theodor-Lieser-Straße 4, Halle (Saale), Germany
Recommended Citation:
Martini E,, Werban U,, Zacharias S,et al. Repeated electromagnetic induction measurements for mapping soil moisture at the field scale: Validation with data from a wireless soil moisture monitoring network[J]. Hydrology and Earth System Sciences,2017-01-01,21(1)