DOI: 10.5194/hess-18-435-2014
Scopus记录号: 2-s2.0-84893482279
论文题名: Spatially resolved information on karst conduit flow from in-cave dye tracing
作者: Lauber U ; , Ufrecht W ; , Goldscheider N
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 2 起始页码: 435
结束页码: 445
语种: 英语
Scopus关键词: Drainage structures
; Flow and transport
; Hydraulic connection
; Hydrograph analysis
; Mean flow velocities
; Natural laboratories
; Temporally resolved
; Tracer breakthrough curves
; Catchments
; Caves
; Groundwater flow
; Open channel flow
; Springs (water)
; Aquifers
; aquifer
; breakthrough curve
; cave
; dye
; environmental monitoring
; heterogeneity
; karst
; phreatic zone
; spatial analysis
; water budget
英文摘要: Artificial tracers are powerful tools for investigating karst systems. Tracers are commonly injected into sinking streams or dolines, while springs serve as monitoring sites. The obtained flow and transport parameters represent mixed information from the vadose, epiphreatic and phreatic zones (that is, the aquifer remains a black box). Accessible active caves constitute valuable but underexploited natural laboratories to gain detailed insights into the hydrologic functioning of the aquifer. Two multi-tracer tests in the catchment of a major karst spring (Blautopf, Germany) with injections and monitoring in two associated water caves aimed at obtaining spatially and temporally resolved information on groundwater flow in different compartments of the system. Two tracers were injected into the caves to characterize the hydraulic connections between them and with the spring. Two injections at the land surface, far from the spring, aimed at resolving the aquifer's internal drainage structure. Tracer breakthrough curves were monitored by field fluorimeters in caves and at the spring. Results demonstrate the dendritic drainage structure of the aquifer. It was possible to obtain relevant flow and transport parameters for different sections of this system. The highest mean flow velocities (275 m h-1) were observed in the near-spring epiphreatic section (open-channel flow), while velocities in the phreatic zone (pressurized flow) were one order of magnitude lower. Determined conduit water volumes confirm results of water balances and hydrograph analyses. In conclusion, experiments and monitoring in caves can deliver spatially resolved information on karst aquifer heterogeneity and dynamics that cannot be obtained by traditional investigative methods. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78334
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 Applied Geosciences, Division of Hydrogeology, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany; Höhlen- und Heimatverein Laichingen, Höhleweg 220, 89159 Laichingen, Germany
Recommended Citation:
Lauber U,, Ufrecht W,, Goldscheider N. Spatially resolved information on karst conduit flow from in-cave dye tracing[J]. Hydrology and Earth System Sciences,2014-01-01,18(2)