Hydrogeochemical and nitrate isotopic evolution of a semiarid mountainous basin aquifer of glacial-fluvial and paleolacustrine origin (Lake Titicaca, Bolivia): the effects of natural processes and anthropogenic activities

Avilés, Gabriela Patricia Flores; Spadini, Lorenzo; Sacchi, Elisa; Rossier, Yvan; Savarino, Joël; Ramos, Oswaldo Eduardo Ramos; Duwig, Céline

doi:10.1007/s10040-021-02434-9

Cited by 6 publications

(1 citation statement)

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“…Hydrochemistry can help define the chemical reactions occurring as groundwater interacts with the host rock (Nagaiah et al 2017). Understanding the variation in hydrochemistry can therefore aid in identifying the hydrogeochemical processes that influence the groundwater′s hydrochemical facies (e.g., Akpataku et al 2019;Flores Avilés et al 2022;Gastmans et al 2016;Owoyemi et al 2019;Shanyengana et al 2004;Teramoto et al 2020;Wagh et al 2016). It is important to understand the controlling factors on water chemistry in order to preserve groundwater resources.…”

Section: Introductionmentioning

confidence: 99%

澳大利亚昆士Tamborine山浅层和深层玄武岩含水层的水文地球化学演变

Catania

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2023

Hydrogeol J

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Tamborine Mountain, Queensland (Australia), is a prime example of a basalt fractured-rock aquifer. Yet very little is known about the hydrochemistry of this groundwater system. Both analytical (major ions and stable isotopes) and multivariate (hierarchical cluster analysis, principal component analysis and factor analysis) analyses were used in this study to investigate the factors that interact within this aquifer system, in order to determine groundwater hydrogeochemistry. A new approach was applied to the data by classifying hydrographs by water type to clearly identify differing aquifer zones. Three distinct groundwater chemistry types were identified, and they were differentiated by variations in depth. Shallow bores were dominated by Na–Cl waters, deep bores were dominated by Na–HCO3 and Ca–HCO3 waters, and the two deepest bores were dominated by mixed water types. The evaluation of hydrogeochemical data has determined that both mineral weathering processes and groundwater/surface-water interaction had a strong influence on the hydrogeochemistry. Seasonal effects were minimal in the study area based on physicochemical parameters and ion chemistry. However, stable isotopic data show temporal trends. Increased rainfall events during the wet season produced a depletion in δ18O and increased d-excess values. The opposite is found during the dry season as a result of higher evaporation rates that are not hindered by intense rainfall events.

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