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A novel probe for point injections in groundwater monitoring wells

Fahrmeier, Nikolai ; Goeppert, Nadine ; Goldscheider, Nico

Hydrogeology journal, 2022-05, Vol.30 (3), p.1021-1029 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
A novel probe for point injections in groundwater monitoring wells
Autor: Fahrmeier, Nikolai ; Goeppert, Nadine ; Goldscheider, Nico
Assuntos: Aquatic Pollution ; Aquifer systems ; Aquifers ; Boreholes ; Dilution ; Dilution tests ; Earth and Environmental Science ; Earth Sciences ; Field tests ; Geology ; Geophysics/Geodesy ; Groundwater ; Hydrogeology ; Hydrology/Water Resources ; Identification methods ; Injection ; Karst ; Laboratories ; Methods ; Monitoring ; Natural flow ; Technical Note ; Tests ; Tracers ; Vertical flow ; Vertical mixing ; Waste Water Technology ; Water Management ; Water monitoring ; Water Pollution Control ; Water Quality/Water Pollution ; Wells
É parte de: Hydrogeology journal, 2022-05, Vol.30 (3), p.1021-1029
Descrição: Groundwater monitoring wells or boreholes often show complex flow behaviors that are essential to understand for the characterization of aquifer systems. In karst or fractured aquifers, where complex conduit and/or fracture networks with differing hydraulic heads can be intersected by a well or borehole, vertical flow is highly probable. Single-borehole dilution tests (SBDT) with uniform injections are, in general, a good method to gain knowledge about a specific well or borehole, but tend to deliver ambiguous results regarding vertical flow, while SBDTs with point injections are an effective method to identify vertical flow. This technical note introduces a newly developed probe for point injections in groundwater without disturbing the natural flow field. In order to evaluate this probe, several tests were conducted in the laboratory and in groundwater monitoring wells that show vertical flow. During repeated tests in the laboratory, the new point injection probe showed a good reproducibility regarding the shape and extent of the tracer cloud after an injection. The opening mechanism was found to be well-functioning and reliable. Field tests lead to significant results for all tested wells and showed that the probe can easily be operated by a single person. Due to the flexibility regarding tracer, aquifer and injection depth, combined with the easy handling, it is a useful device, suitable for the investigation of boreholes and groundwater monitoring wells, and a good alternative to existing methods.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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A novel probe for point injections in groundwater monitoring wells

Fahrmeier, Nikolai ; Goeppert, Nadine ; Goldscheider, Nico

Berlin/Heidelberg: Springer Berlin Heidelberg

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