Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1002/iroh.70025 |
Lizenz  |
|
| Titel (primär) | Lake–groundwater biogeochemical interactions in a river-delimited system: the Groundwater and Lakes Urban Observatory (GLUO) |
| Autor | Dordoni, M.
; Musolff, A.; Knöller, K.; Coder, L.; Krauss, M.
; Rosenlöcher, Y.; Büttner, O.; Tittel, J. |
| Quelle | International Review of Hydrobiology |
| Erscheinungsjahr | 2025 |
| Department | ASAM; SEEFO; HDG; CATHYD; EXPO |
| Sprache | englisch |
| Topic | T4 Coastal System T5 Future Landscapes T9 Healthy Planet |
| Supplements | Supplement 1 Supplement 2 Supplement 3 |
| Abstract |
Preservation of urban aquatic ecosystems is of primary
importance for human well-being, biodiversity protection and the future
of society. Lake–groundwater–river interactions within urban floodplains
harbour intrinsic fragility, yet remain largely understudied.
Appropriate environmental management can help assure the conservation of
these sites through strategies that are based on physical, chemical and
isotope constraints. Here we present the example of the Groundwater and
Lakes Urban Observatory (GLUO) in Magdeburg, Germany, where monitoring
has been carried out since 2022. Our database for the year 2023 includes
data from the Elbe River, two lakes named Lake Salbker South and Lake
Salbker North, and two groundwater wells. Major ion patterns point to
the Elbe River and Lake Salbker South as the end-members for water
compositions within the system, although contributions from the former
appear less significant. Stiff plots suggest the existence of a more
saline end-member that may receive inputs from the Zechstein Formation
and drives the geochemistry of Lake Salbker South. Dissolved oxygen (DO)
concentrations in Lake Salbker South during stratification show a
marked depletion in the hypolimnion with values down to 1.8 mg L−1
that we attribute to mineralization of organic matter as well as
oxidation of sulphur compounds. This feature acknowledges Lake Salbker
South as a natural hydrogen sulphide (H2S) reactor. Water stable isotope compositions (δ2HH2O and δ18OH2O)
of the water bodies within the GLUO outline a trend that is compatible
with moderate evaporation. We discuss that dissolution of saline
deposits may also play a role. These findings emphasize the need to
implement the study of lake–groundwater–river interactions within
floodplains, especially when hypertrophic or sulphur-rich water bodies
are involved. Due to the inherent vulnerability and potential hazards
associated to these environments, we stress the importance of
establishing a multidisciplinary monitoring framework to evaluate their
geochemical fluxes and ecological integrity. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31392 |
| Dordoni, M., Musolff, A., Knöller, K., Coder, L., Krauss, M., Rosenlöcher, Y., Büttner, O., Tittel, J. (2025): Lake–groundwater biogeochemical interactions in a river-delimited system: the Groundwater and Lakes Urban Observatory (GLUO) Int. Rev. Hydrobiol. 10.1002/iroh.70025 |
|