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| Titel |
Quantification of anthropogenic impact on groundwater-dependent terrestrial ecosystem using geochemical and isotope tools combined with 3-D flow and transport modelling |
| VerfasserIn |
A. J. Zurek, S. Witczak, M. Dulinski, P. Wachniew, K. Rozanski, J. Kania, A. Postawa, J. Karczewski, W. J. Moscicki |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 2 ; Nr. 19, no. 2 (2015-02-24), S.1015-1033 |
| Datensatznummer |
250120636
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| Publikation (Nr.) |
 copernicus.org/hess-19-1015-2015.pdf |
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| Zusammenfassung |
| Groundwater-dependent ecosystems (GDEs) have important functions in all
climatic zones as they contribute to biological and landscape diversity and
provide important economic and social services. Steadily growing
anthropogenic pressure on groundwater resources creates a conflict situation
between nature and man which are competing for clean and safe sources of
water. Such conflicts are particularly noticeable in GDEs located in densely
populated regions. A dedicated study was launched in 2010 with the main aim
to better understand the functioning of a groundwater-dependent terrestrial
ecosystem (GDTE) located in southern Poland. The GDTE consists of a valuable
forest stand (Niepolomice Forest) and associated wetland (Wielkie Błoto
fen). It relies mostly on groundwater from the shallow Quaternary aquifer
and possibly from the deeper Neogene (Bogucice Sands) aquifer. In July 2009
a cluster of new pumping wells abstracting water from the Neogene aquifer
was set up 1 km to the northern border of the fen. A conceptual model of the
Wielkie Błoto fen area for the natural, pre-exploitation state and for the
envisaged future status resulting from intense abstraction of groundwater
through the new well field was developed. The main aim of the reported study
was to probe the validity of the conceptual model and to quantify the
expected anthropogenic impact on the studied GDTE. A wide range of research
tools was used. The results obtained through combined geologic, geophysical,
geochemical, hydrometric and isotope investigations provide strong
evidence for the existence of upward seepage of groundwater from the deeper
Neogene aquifer to the shallow Quaternary aquifer supporting the studied
GDTE. Simulations of the groundwater flow field in the study area with the aid
of a 3-D flow and transport model developed for Bogucice Sands (Neogene)
aquifer and calibrated using environmental tracer data and observations of
hydraulic head in three different locations on the study area, allowed us to
quantify the transient response of the aquifer to operation of the
newly established Wola Batorska well field. The model runs reveal the presence of
upward groundwater seepage to the shallow Quaternary aquifer of the
order of 440 m3 d−1. By the end of the simulation period (2029),
with continuous operation of the Wola Batorska well field at maximum
permissible capacity (ca. 10 000 m3 d−1), the direction of
groundwater seepage will change sign (total change of the order of 900 m3 d−1).
The water table drawdown in the study area will reach ca. 30 cm. This may
have significant adverse effects on functioning of the
studied GDTE. |
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