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| Titel |
Geochemical tracers for the groundwater and streams in central mountainous regions of Taiwan |
| VerfasserIn |
Jin-Lun Chuang, Tsanyao Frank Yang, Ai-Ti Chen, Ching-Chou Fu, Shih-Jung Lin, Tsung-Kwei Liu, Kuan-Yu Chen, Yunshuen Wang |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094108
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| Publikation (Nr.) |
 EGU/EGU2014-9494.pdf |
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| Zusammenfassung |
| Noble gases have been considered as sensitive tracers for groundwater due to their unique
geochemical characteristics. In this study, groundwater of the monitoring wells and river
water were collected for geochemical analysis, including Radon concentration and Helium
isotopes, from central mountainous regions of Taiwan to discuss their fluid sources. The
results of hydrogen and oxygen isotopic values are -77.8~-36.5oand -10.7~-6.3o
respectively, falling on the local meteoric water line of Taiwan. It revealed that groundwater
source in studied area is mainly from the precipitation. The helium isotopic ratios of the
samples range from 0.78 to 1.13 Ra. It implies that, in addition to the air-saturated water,
there are additional sources for the groundwater in central mountainous regions of
Taiwan. Interestingly the water sample from Liwu River was detected high 222Rn
concentration, 7.66 kBq/m3, which is much higher than background values in normal
river water. It suggests that local groundwater with high 222Rn concentration of
1.38~75.4 kBq/m3 may play important role for the Liwu River. Combined with other
geochemical tracers, like 87Sr/86Sr and carbon isotopes of DIC, we will further discuss
possible interaction between the groundwater and surface water with bed rocks. |
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