Influence of rainfall quantity on the isotopic composition (18O and 2H) of water in mountainous areas. Application for groundwater research in the Yunquera-Nieves karst aquifers (S Spain)

Andreo, Bartolomé; Liñán, Cristina; Carrasco, Francisco; Cisneros, C. Jiménez de; Caballero, Fernando; Mudry, Jacques

doi:10.1016/j.apgeochem.2003.08.002

Cited by 79 publications

(42 citation statements)

References 19 publications

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“…The isotopic signatures of the groundwater are plotted along the GMWL, indicating an Atlantic source of the precipitation. This is in contrast to other studies in Andalusia where an influence of the western Mediterranean has also been reported (Cruz San Julian et al 1992;Andreo et al 2004;Kohfahl et al 2008). V-06 shows a clearly lighter isotopic signature, indicating higher recharge altitudes than the other points.…”

Section: Stable Isotopescontrasting

confidence: 54%

The impact of hydrological conditions on salinisation and nitrate concentration in the coastal Velez River aquifer (southern Spain)

et al. 2009

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This study reports the impact of hydrological conditions on salinisation and nitrate concentrations of a coastal aquifer located at the Mediterranean Sea, southern Spain. Eighty-two samples of ground-and surface water taken during two extreme hydrological events between 1994 and 1996 at 25 different wells were evaluated with regard to hydrochemistry, focusing on nitrate concentrations and salinisation, which constitute the main hazard of this aquifer. Furthermore, hydrochemical data were analysed by principal component analysis (PCA). Additionally, in 2007 13 ground-and surface water samples taken at 12 different locations were analysed for stable isotopes of D/ 18 O, and one sample was analysed for 15 N. Since 1993 until present saltwater intrusion was observed only during dry hydrological conditions in 1994; it showed an irregular salinisation pattern probably related to locally elevated hydraulic conductivities. Nitrate concentrations increase significantly during wet hydrologic conditions owing to uptake of nitrate by rising groundwater. Stable isotopes of groundwater reveal an Atlantic origin of the precipitation that recharges the aquifer and a minor amount of groundwater recharge by the water coming from the La Viñuela reservoir, which is used for irrigation over the aquifer. 15 N isotopes point to a considerable input of nitrates derived from organic fertilisers.

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Section: Stable Isotopescontrasting

confidence: 54%

The impact of hydrological conditions on salinisation and nitrate concentration in the coastal Velez River aquifer (southern Spain)

et al. 2009

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“…O of precipitation (Andreo et al, 2004), but no highresolution records are currently available. There is an indication that there is a correlation between δ…”

mentioning

confidence: 99%

Modification and preservation of environmental signals in speleothems

Fairchild

Smith

Baker

et al. 2006

Earth-Science Reviews

736

506

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Speleothems are primarily studied in order to generate archives of climatic change and results have led to significant advances in identifying and dating major shifts in the climate system. However, the climatological meaning of many speleothem records cannot be interpreted unequivocally; this is particularly so for more subtle shifts and shorter time periods, but the use of multiple proxies and improving understanding of formation mechanisms offers a clear way forward.An explicit description of speleothem records as time series draws attention to the nature and importance of the signal filtering processes by which the weather, the seasons and longer-term climatic and other environmental fluctuations become encoded in speleothems. We distinguish five sources of variation that influence speleothem geochemistry: atmospheric, vegetation/soil, karstic aquifer, primary speleothem crystal growth and secondary alteration and give specific examples of their influence. The direct role of climate diminishes progressively through these five factors.We identify and review a number of processes identified in recent and current work that bear significantly on the conventional interpretation of speleothem records, for example: 1) speleothem geochemistry can vary seasonally and hence a research need is to establish the proportion of growth attributable to different seasons and whether this varies over time.2) whereas there has traditionally been a focus on monthly mean δ 18 O data of atmospheric moisture, current work emphasizes the importance of understanding the synoptic processes that lead to characteristic isotope signals, since changing relative abundance of different weather types might 1 Corresponding author, fax +44(0)1214145528, E-mail: i.j.fairchild@bham.ac.uk control their variation on the longer-term. 3) the ecosystem and soil zone overlying the cave fundamentally imprint the carbon and trace element signals and can show characteristic variations with time. 4) new modelling on aquifer plumbing allows quantification of the effects of aquifer mixing. 5) recent work has emphasized the importance and seasonal variability of CO 2 -degassing leading to calcite precipitation upflow of a depositional site on carbon isotope and trace element composition of speleothems. 6) Although much is known about the chemical partitioning between water and stalagmites, variability in relation to crystal growth mechanisms and kinetics is a research frontier. 7) Aragonite is susceptible to conversion to calcite with major loss of chemical information, but the controls on the rate of this process are obscure.Analytical factors are critical to generate high-resolution speleothem records. A variety of methods of trace element analysis are available, but standardization is a common problem with the most rapid methods. New stable isotope data on Irish stalagmite CC3 compares rapid laser-ablation techniques with the conventional analysis of micromilled powders and ion microprobe methods. A high degree of comparability between techniques ...

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“…A coleta das águas teve a duração de um ano hidrológico, para abranger toda a variação climática possível (Abbott et al, 2000;Andreo et al, 2004;Aquilina et al, 2005;Darling & Bath, 1988;Huddart et al, 1999;O'Driscoll et al, 2005;Taylor & Howard, 1996;Williams, 1997 …”

Section: Amostragemunclassified

“…É importante também manter a temperatura sem alteração, para que não haja fracionamento. Alguns autores enterram o frasco ou o mantem embrulhado, principalmente em amostragens de longo período (mensais), como a da chuva (Abbott et al, 2000;Andreo et al, 2004;O'Driscoll et al, 2005). Outros destacam o fato dos frascos terem sido vedados com parafina/cera, para evitar evaporação, principalmente no caso dos isótopos estáveis (Andreo et al, 2004), ou vedados com uma fita isolante (Ojiambo et al, 2003).…”

Section: Procedimento De Amostragemunclassified

“…arenito fino a siltito (bege) X X X S10V(1,2) 1.20 argila bege c/ intercalações de areia X X X X S10V(2,4) 2.40 areia fina bege a laranja S10V(3,6) 3.60 areia fina bege a laranja X X X S10V(4,8) 4.80 areia fina bege a laranja S10V(6,0) 6.00 arenito fino a médio bege alaranjado S10V(7,2) 7.20 arenito fino a médio bege alaranjado X X X X S10V (7,8) O em amostras de água baseia-se na troca isotópica que ocorre entre a água e gás CO 2 de composição isotópica conhecida (Barbieri et al, 2005;Abbott et al, 2000;Andreo et al, 2004;Huddart et al, 1999;Farah et al, 2000;Williams, 1997;Darling & Bath, 1988). Para isto, coleta-se uma alíquota de 3 ml com uma seringa que já contenha algumas gotas de ácido sulfúrico.…”

Section: As Análises De Difração De Raios-x (Dfrx) Foram Feitas No Launclassified

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Aplicação de isótopos de Pb, Sr, H e O como traçadores da recarga e da contaminação de aqüíferos metropolitanos: um exemplo da Bacia do Alto Tietê

Martins¹

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Influence of rainfall quantity on the isotopic composition (18O and 2H) of water in mountainous areas. Application for groundwater research in the Yunquera-Nieves karst aquifers (S Spain)

Cited by 79 publications

References 19 publications

The impact of hydrological conditions on salinisation and nitrate concentration in the coastal Velez River aquifer (southern Spain)

The impact of hydrological conditions on salinisation and nitrate concentration in the coastal Velez River aquifer (southern Spain)

Modification and preservation of environmental signals in speleothems

Aplicação de isótopos de Pb, Sr, H e O como traçadores da recarga e da contaminação de aqüíferos metropolitanos: um exemplo da Bacia do Alto Tietê

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