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| Titel |
Interaction of water components in the semi-arid Huasco and Limarí river basins, North Central Chile |
| VerfasserIn |
G. Strauch, R. Oyarzún, F. Reinstorf, J. Oyarzún, M. Schirmer, K. Knöller |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 4th EGU Alexander von Humboldt Conference "The Andes: Challenge for Geosciences" ; Nr. 22 (2009-10-13), S.51-57 |
| Datensatznummer |
250014728
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| Publikation (Nr.) |
 copernicus.org/adgeo-22-51-2009.pdf |
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| Zusammenfassung |
For sustainable water resource management in semi-arid regions, sound
information is required about interactions between the different components
of the water system: rain/snow precipitation, surface/subsurface run-off,
groundwater recharge. Exemplarily, the Huasco and Limarí river basins
as water stressed river catchments have been studied by isotope and
hydrochemical methods for (i) the origin of water, (ii) water quality, (iii)
relations of surface and groundwater.
Applying the complex multi-isotopic and hydrochemical methodology to the
water components of the Huasco and Limarí basins, a differentiation of
water components concerning subsurface flow and river water along the
catchment area and by anthropogenic impacts are detected. Sulphate and
nitrate concentrations indicate remarkable input from mining and
agricultural activities along the river catchment.
The 2H-18O relations of river water and groundwater of both
catchments point to the behaviour of river waters originated in an arid to
semi-arid environment.
Consequently, the groundwater from several production wells in the lower
parts of the catchments is related to the rivers where the wells located,
however, it can be distinguished from the river water. Using the
hydrological water balance and the isotope mixing model, the interaction
between surface and subsurface flows and river flow is estimated. |
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