Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.3390/w6030584 |
| Titel (primär) | Submarine groundwater discharge at a single spot location: evaluation of different detection approaches |
| Autor | Schubert, M.; Scholten, J.; Schmidt, A.; Comanducci, J.F.; Pham, M.K.; Mallast, U.; Knoeller, K. |
| Quelle | Water |
| Erscheinungsjahr | 2014 |
| Department | GWS; CATHYD |
| Band/Volume | 6 |
| Heft | 3 |
| Seite von | 584 |
| Seite bis | 601 |
| Sprache | englisch |
| Keywords | submarine groundwater discharge; SGD; environmental tracers; radon; radium; stable isotopes; multi-temporal thermal remote sensing |
| UFZ Querschnittsthemen | RU2; |
| Abstract | Submarine groundwater discharge (SGD) into
the ocean is of general interest because it acts as vehicle for the
transport of dissolved contaminants and/or nutrients into the coastal
sea and because it may be accompanied by the loss of significant volumes
of freshwater. Due to the large-scale and long-term nature of the
related hydrological processes, environmental tracers are required for
SGD investigation. The water parameters of electrical conductivity and
temperature, the naturally occurring radionuclides of radon and radium
as well as the stable water isotopes 18O and 2H
have proven in previous studies their general suitability for the
detection and quantification of SGD. However, individual hydrogeological
settings require a site-specific application of this “tool box”. This
study evaluates and compares the applicability of the abovementioned
tracers for investigating SGD from a distinct submarine source in a
karst environment at Cabbé, southern France. The specific advantages and
disadvantages of each individual parameter under the given
hydrogeological conditions are discussed. Radon appeared to be the most
suitable environmental tracer in the site specific context. The water
temperature was less reliable due to the little temperature difference
between seawater and groundwater and since the diurnal variation of the
air temperature masks potential SGD signals. Radium isotopes are less
applicable in the studied region due to the lack of a well-developed
subterranean estuary. The stable water isotopes showed results
consistent with the salinity and radon data; however, the significantly
higher effort required for stable isotope analyses is disadvantageous. A
multi-temporal thermal remote sensing approach proved to be a powerful
tool for initial SGD surveying. (This article belongs to the Special Issue Environmental Tracers) |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14718 |
| Schubert, M., Scholten, J., Schmidt, A., Comanducci, J.F., Pham, M.K., Mallast, U., Knoeller, K. (2014): Submarine groundwater discharge at a single spot location: evaluation of different detection approaches Water 6 (3), 584 - 601 10.3390/w6030584 |
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