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| Titel |
Spatio-temporal impact of climate change on the groundwater system |
| VerfasserIn |
J. Dams, E. Salvadore, T. Daele, V. Ntegeka, P. Willems, O. Batelaan |
| 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 ; 16, no. 5 ; Nr. 16, no. 5 (2012-05-23), S.1517-1531 |
| Datensatznummer |
250013303
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| Publikation (Nr.) |
 copernicus.org/hess-16-1517-2012.pdf |
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| Zusammenfassung |
| Given the importance of groundwater for food production and drinking water
supply, but also for the survival of groundwater dependent terrestrial
ecosystems (GWDTEs) it is essential to assess the impact of climate change on
this freshwater resource. In this paper we study with high temporal and
spatial resolution the impact of 28 climate change scenarios on the
groundwater system of a lowland catchment in Belgium. Our results show for
the scenario period 2070–2101 compared with the reference period 1960–1991, a
change in annual groundwater recharge between −20% and +7%. On average
annual groundwater recharge decreases 7%. In most scenarios the recharge
increases during winter but decreases during summer. The altered recharge
patterns cause the groundwater level to decrease significantly from September
to January. On average the groundwater level decreases about 7 cm with a
standard deviation between the scenarios of 5 cm. Groundwater levels in
interfluves and upstream areas are more sensitive to climate change than
groundwater levels in the river valley. Groundwater discharge to GWDTEs is
expected to decrease during late summer and autumn as much as 10%, though
the discharge remains at reference-period level during winter and early
spring. As GWDTEs are strongly influenced by temporal dynamics of the
groundwater system, close monitoring of groundwater and implementation of
adaptive management measures are required to prevent ecological loss. |
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