Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain)
We characterize the precipitation and groundwater in a mountainous (peaks slightly above 3000 m a.s.l.), semi-arid river basin in SE Spain in terms of the isotopes 18O and 2H. This basin, with an extension of about 7000 km2, is an ideal site for such a study because fronts from the Atlantic and the...
| Autores: | , , , , , , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2010 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/277023 |
| Acesso em linha: | http://hdl.handle.net/10261/277023 https://doi.org/10.1002/hyp.7597 |
| Access Level: | acceso abierto |
| Palavra-chave: | stable isotopes Precipitation local meteoric water line Groundwater Southeast Spain Cuenca Guadiana Andalucía |
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Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain)Fernández Chacón, FranciscaBenavente Herrera, JoséRubio Campos, Juan CarlosKohfahl, Claus ReimerJiménez, J.Meyer, HannoHubberten, Hans WolfgangPekdeger, Asafstable isotopesPrecipitationlocal meteoric water lineGroundwaterSoutheast SpainCuenca GuadianaAndalucíaWe characterize the precipitation and groundwater in a mountainous (peaks slightly above 3000 m a.s.l.), semi-arid river basin in SE Spain in terms of the isotopes 18O and 2H. This basin, with an extension of about 7000 km2, is an ideal site for such a study because fronts from the Atlantic and the Mediterranean converge here. Much of the land is farmed and irrigated both by groundwater and runoff water collected in reservoirs. A total of approximately 100 water samples from precipitation and 300 from groundwater have been analysed. To sample precipitation we set up a network of 39 stations at different altitudes (800–1700 m a.s.l.), with which we were able to collect the rain and snowfall from 29 separate events between July 2005 and April 2007 and take monthly samples during the periods of maximum recharge of the aquifers. To characterize the groundwater we set up a control network of 43 points (23 springs and 20 wells) to sample every 3 months the main aquifers and both the thermal and non-thermal groundwater. We also sampled two shallow-water sites (a reservoir and a river). The isotope composition of the precipitation forms a local meteoric water line (LMWL) characterized by the equation υD D 7Ð72υ18O C 9Ð90, with mean values for υ18O and υD of 10Ð28‰ and 69Ð33‰, respectively, and 12Ð9‰ for the d-excess value. To correlate the isotope composition of the rainfall water with groundwater we calculated the weighted local meteoric water line (WLMWL), characterized by the equation υD D 7Ð40υ18O C 7Ð24, which takes into account the quantity of water precipitated during each event. These values of (dυD/dυ18O)<8 and d-excess (υD–8υ18O)<10 in each curve bear witness to the ‘amount effect’, an effect which is more manifest between May and September, when the ground temperature is higher. Other effects noted in the basin were those of altitude and the continental influence. The isotopic compositions of the groundwater are represented by the equation υD D 4Ð79υ18O 18Ð64. The groundwater is richer in heavy isotopes than the rainfall, with mean values of 8Ð48‰ for υ18O and 59Ð27‰ for υD. The isotope enrichment processes detected include a higher rate of evaporation from detrital aquifers than from carbonate ones, the effects of recharging aquifers from irrigation return flow and/or from reservoirs’ leakage and enrichment in υ18O from thermal waterInstituto del Agua, Universidad de Granada, EspañaOficina de Granada, Instituto Geológico y Minero de España, EspañaInstitute of Geological Sciences, Freie Universit¨at Berlin, AlemaniaAlfred Wegener Institute, AlemaniaJohn Wiley & SonsCSIC - Instituto Geológico y Minero de España (IGME)202220222010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/277023https://doi.org/10.1002/hyp.7597reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://onlinelibrary.wiley.com/doi/10.1002/hyp.7597info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2770232026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| title |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| spellingShingle |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) Fernández Chacón, Francisca stable isotopes Precipitation local meteoric water line Groundwater Southeast Spain Cuenca Guadiana Andalucía |
| title_short |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| title_full |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| title_fullStr |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| title_full_unstemmed |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| title_sort |
Isotopic composition (delta18O and deltaD) of precipitation and groundwater in a semi-arid, mountainous area (Guadiana Menor basin, Southeast Spain) |
| dc.creator.none.fl_str_mv |
Fernández Chacón, Francisca Benavente Herrera, José Rubio Campos, Juan Carlos Kohfahl, Claus Reimer Jiménez, J. Meyer, Hanno Hubberten, Hans Wolfgang Pekdeger, Asaf |
| author |
Fernández Chacón, Francisca |
| author_facet |
Fernández Chacón, Francisca Benavente Herrera, José Rubio Campos, Juan Carlos Kohfahl, Claus Reimer Jiménez, J. Meyer, Hanno Hubberten, Hans Wolfgang Pekdeger, Asaf |
| author_role |
author |
| author2 |
Benavente Herrera, José Rubio Campos, Juan Carlos Kohfahl, Claus Reimer Jiménez, J. Meyer, Hanno Hubberten, Hans Wolfgang Pekdeger, Asaf |
| author2_role |
author author author author author author author |
| dc.contributor.none.fl_str_mv |
CSIC - Instituto Geológico y Minero de España (IGME) |
| dc.subject.none.fl_str_mv |
stable isotopes Precipitation local meteoric water line Groundwater Southeast Spain Cuenca Guadiana Andalucía |
| topic |
stable isotopes Precipitation local meteoric water line Groundwater Southeast Spain Cuenca Guadiana Andalucía |
| description |
We characterize the precipitation and groundwater in a mountainous (peaks slightly above 3000 m a.s.l.), semi-arid river basin in SE Spain in terms of the isotopes 18O and 2H. This basin, with an extension of about 7000 km2, is an ideal site for such a study because fronts from the Atlantic and the Mediterranean converge here. Much of the land is farmed and irrigated both by groundwater and runoff water collected in reservoirs. A total of approximately 100 water samples from precipitation and 300 from groundwater have been analysed. To sample precipitation we set up a network of 39 stations at different altitudes (800–1700 m a.s.l.), with which we were able to collect the rain and snowfall from 29 separate events between July 2005 and April 2007 and take monthly samples during the periods of maximum recharge of the aquifers. To characterize the groundwater we set up a control network of 43 points (23 springs and 20 wells) to sample every 3 months the main aquifers and both the thermal and non-thermal groundwater. We also sampled two shallow-water sites (a reservoir and a river). The isotope composition of the precipitation forms a local meteoric water line (LMWL) characterized by the equation υD D 7Ð72υ18O C 9Ð90, with mean values for υ18O and υD of 10Ð28‰ and 69Ð33‰, respectively, and 12Ð9‰ for the d-excess value. To correlate the isotope composition of the rainfall water with groundwater we calculated the weighted local meteoric water line (WLMWL), characterized by the equation υD D 7Ð40υ18O C 7Ð24, which takes into account the quantity of water precipitated during each event. These values of (dυD/dυ18O)<8 and d-excess (υD–8υ18O)<10 in each curve bear witness to the ‘amount effect’, an effect which is more manifest between May and September, when the ground temperature is higher. Other effects noted in the basin were those of altitude and the continental influence. The isotopic compositions of the groundwater are represented by the equation υD D 4Ð79υ18O 18Ð64. The groundwater is richer in heavy isotopes than the rainfall, with mean values of 8Ð48‰ for υ18O and 59Ð27‰ for υD. The isotope enrichment processes detected include a higher rate of evaporation from detrital aquifers than from carbonate ones, the effects of recharging aquifers from irrigation return flow and/or from reservoirs’ leakage and enrichment in υ18O from thermal water |
| publishDate |
2010 |
| dc.date.none.fl_str_mv |
2010 2022 2022 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/277023 https://doi.org/10.1002/hyp.7597 |
| url |
http://hdl.handle.net/10261/277023 https://doi.org/10.1002/hyp.7597 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
https://onlinelibrary.wiley.com/doi/10.1002/hyp.7597 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
John Wiley & Sons |
| publisher.none.fl_str_mv |
John Wiley & Sons |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
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1869404749147668480 |
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15,812429 |