DOI: 10.5194/hess-19-225-2015
Scopus记录号: 2-s2.0-84920973667
论文题名: Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements
作者: Hübner R ; , Heller K ; , Günther T ; , Kleber A
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 1 起始页码: 225
结束页码: 240
语种: 英语
Scopus关键词: Catchments
; Dynamics
; Electric conductivity
; Moisture
; Moisture control
; Runoff
; Soil moisture
; Soils
; Water content
; Content distribution
; Dynamics of soil moistures
; Electrical resistivity tomography
; Hydrological process
; Hydrometric measurements
; Inversion parameters
; Soil moisture dynamics
; Soil moisture sensors
; Soil surveys
; electrical resistivity
; floodplain
; flow pattern
; heterogeneity
; hillslope
; hydrological change
; hydrometry
; soil moisture
; spatial analysis
; tensiometer
; tomography
; water budget
; Erzgebirge Mountains
英文摘要: Besides floodplains, hillslopes are basic units that mainly control water movement and flow pathways within catchments of subdued mountain ranges. The structure of their shallow subsurface affects water balance, e.g. infiltration, retention, and runoff. Nevertheless, there is still a gap in the knowledge of the hydrological dynamics on hillslopes, notably due to the lack of generalization and transferability. This study presents a robust multi-method framework of electrical resistivity tomography (ERT) in addition to hydrometric point measurements, transferring hydrometric data into higher spatial scales to obtain additional patterns of distribution and dynamics of soil moisture on a hillslope. A geoelectrical monitoring in a small catchment in the eastern Ore Mountains was carried out at weekly intervals from May to December 2008 to image seasonal moisture dynamics on the hillslope scale. To link water content and electrical resistivity, the parameters of Archie's law were determined using different core samples. To optimize inversion parameters and methods, the derived spatial and temporal water content distribution was compared to tensiometer data. The results from ERT measurements show a strong correlation with the hydrometric data. The response is congruent to the soil tension data. Water content calculated from the ERT profile shows similar variations as that of water content from soil moisture sensors. Consequently, soil moisture dynamics on the hillslope scale may be determined not only by expensive invasive punctual hydrometric measurements, but also by minimally invasive time-lapse ERT, provided that pedo-/petrophysical relationships are known. Since ERT integrates larger spatial scales, a combination with hydrometric point measurements improves the understanding of the ongoing hydrological processes and better suits identification of heterogeneities. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78642
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Institute of Geography, Dresden University of Technology, Helmholtzstr. 10, Dresden, Germany; Leibniz Institute for Applied Geophysics (LIAG), Stilleweg 2, D-Hanover, Germany
Recommended Citation:
Hübner R,, Heller K,, Günther T,et al. Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements[J]. Hydrology and Earth System Sciences,2015-01-01,19(1)