DOI: 10.5194/hess-21-3167-2017
Scopus记录号: 2-s2.0-85021675546
论文题名: Landscape-scale water balance monitoring with an iGrav superconducting gravimeter in a field enclosure
作者: Güntner A ; , Reich M ; , Mikolaj M ; , Creutzfeldt B ; , Schroeder S ; , Wziontek H
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 6 起始页码: 3167
结束页码: 3182
语种: 英语
Scopus关键词: Digital storage
; Enclosures
; Observatories
; Time series
; Actual evapotranspiration
; Controlled environment
; Hydrological fields
; Spatial heterogeneity
; Superconducting gravimeter
; Temperate climate
; Water and energies
; Water balance components
; Gravimeters
; climate conditions
; evapotranspiration
; grassland
; gravimetry
; landscape change
; water budget
; water storage
英文摘要: In spite of the fundamental role of the landscape water balance for the Earth's water and energy cycles, monitoring the water balance and its components beyond the point scale is notoriously difficult due to the multitude of flow and storage processes and their spatial heterogeneity. Here, we present the first field deployment of an iGrav superconducting gravimeter (SG) in a minimized enclosure for long-term integrative monitoring of water storage changes. Results of the field SG on a grassland site under wet-temperate climate conditions were compared to data provided by a nearby SG located in the controlled environment of an observatory building. The field system proves to provide gravity time series that are similarly precise as those of the observatory SG. At the same time, the field SG is more sensitive to hydrological variations than the observatory SG. We demonstrate that the gravity variations observed by the field setup are almost independent of the depth below the terrain surface where water storage changes occur (contrary to SGs in buildings), and thus the field SG system directly observes the total water storage change, i.e., the water balance, in its surroundings in an integrative way. We provide a framework to single out the water balance components actual evapotranspiration and lateral subsurface discharge from the gravity time series on annual to daily timescales. With about 99 and 85% of the gravity signal due to local water storage changes originating within a radius of 4000 and 200m around the instrument, respectively, this setup paves the road towards gravimetry as a continuous hydrological field-monitoring technique at the landscape scale. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79140
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 5.4 Hydrology, Potsdam, Germany; Senate Department for Urban Development and the Environment, Berlin, Germany; Federal Agency for Cartography and Geodesy (BKG), Leipzig, Germany; University of Potsdam, Institute of Earth and Environmental Science, Potsdam, Germany
Recommended Citation:
Güntner A,, Reich M,, Mikolaj M,et al. Landscape-scale water balance monitoring with an iGrav superconducting gravimeter in a field enclosure[J]. Hydrology and Earth System Sciences,2017-01-01,21(6)