Publication Date:
2020-12-15
Description:
determined for evaluating its possible use as an isotopic tracer of the local groundwater recharge. These
spot measures were compared with a longer series of local rain and spring compositions and with other
samples taken, under different hydrogeological conditions, in caves of the Harz Mountains (Northern Germany).
The slow flowing dripwater from Sicily showed d18O/dD ratios similar to those of local rain and
groundwater, demonstrating that these three are all parent waters. A parallel similarity was found in
the vertical isotopic gradient (Dd18O) of the three groups of water, accounting for their common meteoric
origin. In the colder Harz Region, dripwater, spring water and rain have the same d18O/dD ratio but fast
flowing dripwater, infiltrating through open cracks, is significantly enriched in lighter isotopes and representative
of short residence time percolation. These results lead to the conclusion that dripwater, even
if collected as spot samples, can be considered as a good isotopic marker of the average local groundwater
recharge on the condition that only slow, diffused drips due to seepages are sampled.
Description:
Published
Description:
231-239
Description:
3.7. Dinamica del clima e dell'oceano
Description:
JCR Journal
Description:
restricted
Keywords:
Harz Mountains
;
Isotopic composition
;
Rain
;
Groundwater
;
Dripwater
;
Sicily
;
Rain
;
03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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