Isotope geochemistry and modelling of the multi-aquifer system in the eastern part of Lithuania

Mokrik, Robert; Juodkazis, Vytautas; Štuopis, Anicetas; Mažeika, Jonas

doi:10.1007/s10040-014-1120-6

Cited by 16 publications

(21 citation statements)

References 24 publications

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“…In the piezometer PzC09, the concentration of TDS was 1,558 mg/L. According to the stable isotope data available, in the same direction of flow, there is a depletion in values of δ 18 O.…”

Section: Resultsmentioning

confidence: 99%

“…Facies are expressed as the measured concentration of major ions in decreasing order [18]. Various techniques are used for hydrogeochemical interpretation, based on data from spatial representations, and graphical and statistical methods.…”

Section: Figure 1 Location Of Study Areamentioning

confidence: 99%

“…Other methods for the interpretation of groundwater chemistry include analysis techniques like multivariate statistics methods [19][20][21], inverse hydrogeochemical modeling [22,23], and the use of tracers and isotopic analysis [18,[24][25][26][27].…”

Section: Figure 1 Location Of Study Areamentioning

confidence: 99%

“…In 2013, the isotopic characterization of the Gulf of Urabá aquifer was completed, using 2 H, 18 O, 14 C, and 13 C [7]. With field information gathered since 1993, and considering the results of the detailed studies performed since then, a reinterpretation of the conceptual model of the aquifer established that the hydrogeological system of Urabá has a multilayer character [8].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogeochemical characterization and identification of a system of regional flow. Case study: the aquifer on the Gulf of Urabá, Colombia

Ossa

Betancur-Vargas

2018

Rev. Fac. Ing. Univ. Antioquia

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ABSTRACT:Hydrogeochemistry is an essential tool for the verification of conceptual models, especially of groundwater flow models. This is even more relevant when dealing with complex hydrogeological models that have intercalating layers with different degrees of permeability, and regional flows contributing to the system. The hydrogeochemical characteristics of the Urabá-Colombia Aquifer and geological cross-sections were studied to establish possible processes that explain the groundwater flow evolution and the recharge zones. 4 flow lines were considered to show the groundwater evolution from Ca 2+ -HCO 3 -facies and a TDS concentration of approximately 400 mg/L, trough Ca 2+ -Mg 2+ -HCO 3 -and Na + -Mg 2+ -HCO 3 -facies, ending with Na + -HCO 3 -facies close to discharge area, with TDS=1,550 mg/L. Data on stable isotopes confirmed the groundwater flow directions. It is also clear that evolution orders correspond to the possible flow rates in areas with a homogeneous gradient, but with higher hydraulic conductivity conditions to the south and center, compared to the north. RESUMEN:La hidrogeoquímica constituye una herramienta fundamental para la verificación de los modelos conceptuales, en particular los modelos de flujo de aguas subterráneas, esto se hace aún más relevante cuando se tienen modelos hidrogeológicos complejos en los que se intercalan capas de distinta permeabilidad e intervienen flujos regionales. Analizando las características del Acuífero del Golfo de Urabá y secciones geológicas, fue posible establecer procesos que explican la evolución del flujo del agua subterránea y las zonas de recarga del acuífero. Se utilizaron 4 líneas de flujo para mostrar la evolución del agua subterránea de facies Ca 2+ -HCO 3 -y una concentración de STD de 400 mg/L aproximadamente, pasando por facies Ca 2+ -Mg 2+ -HCO 3 -y Na + -Mg 2+ -HCO 3 -, y finalizando con una facies Na + -HCO 3 -, cerca de la zona de descarga, con STD=1,550 mg/L aproximadamente. Algunos datos de isotopos estables sustentan la verificación de los sentidos de flujo hidrogeológico. También es claro que los ordines de evolución se corresponden con las posibles velocidades de flujo en zona con gradiente homogéneo pero condiciones de conductividad hidráulica más altas en el sur y centro que en el norte.

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“…In the piezometer PzC09, the concentration of TDS was 1,558 mg/L. According to the stable isotope data available, in the same direction of flow, there is a depletion in values of δ 18 O.…”

Section: Resultsmentioning

confidence: 99%

Section: Figure 1 Location Of Study Areamentioning

confidence: 99%

Section: Figure 1 Location Of Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogeochemical characterization and identification of a system of regional flow. Case study: the aquifer on the Gulf of Urabá, Colombia

Ossa

Betancur-Vargas

2018

Rev. Fac. Ing. Univ. Antioquia

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“…MODTATH can provide useful results only if MODFLOW carries reliable HM, such as LAMO4. It is described in [11] that the appliance of MODPATH with the HM for Lithuania eastern part provided very impressive results on modeling isotope geochemistry.…”

Section: Appliance Of Lamo For Groundwater Particle Trackingmentioning

confidence: 99%

The Novel Updates of the Hydrogeological Model of Latvia

Spalviņš

Šlangens

Lāce

et al. 2015

BFPCS

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-In 2010-2012, the hydrogeological model (HM) of Latvia (LAMO) was established by the scientists of Riga Technical University (RTU). LAMO is run by the commercial program Groundwater Vistas (GV). LAMO has generalized the geological and hydrogeological data that were provided for the active groundwater zone by the Latvian Environment, Geology and Meteorology Centre (LEGMC). In 2013-2014, LAMO was notably upgraded and a large amount of real hydrogeological data were added. In 2015, new improvements of LAMO were accomplished. The size of HM plane approximation step was reduced twofold (from 500 meters to 250 meters), the base flows of rivers were calibrated by using the hydrological data of measured river streams, and the permeability maps of HM aquifers were refined. The present paper describes the essence of the new updates.

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Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

Villegas

Paredes

Betancur

et al. 2018

Hydrological Processes

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The coastal confined aquifer in the Gulf of Urabá (Colombia) is an important water source for the banana agro-industry as well as for urban and rural communities. However, the main processes controlling recharge and mixing in the aquifer are still poorly understood. Hydrochemical analyses and stable isotope monitoring were conducted to (a) determine groundwater recharge origin, mean groundwater age, and the main processes governing groundwater chemistry and the potential mixing of marine water and the influence of diffusive processes from the two surrounding aquitard layers.Hydrochemical data indicate that the main processes affecting the dissolved chemical composition include cation exchange, dissolution of carbonated and CO 2 , and silicate weathering. δ 18 O and δ 2 H compositions combined with 14 C data highlight the differences in climatic conditions between the recharge zone and the confined section of the aquifer, which is close to the Atlantic Ocean. Groundwater samples with 14 C ages from recent to 28,300 years BP show a depleted isotopic trend ranging from −6.43‰ to −9.14‰ in δ 18 O and from −43.2‰ to −65.7‰ in δ 2 H. The most depleted δ 18 O and δ 2 H compositions suggest a cooler recharge climate than the current conditions (corresponding to the last glacial period of the late Pleistocene). Depleted δ 13 C values in the total dissolved inorganic carbon indicate the existence of organic material oxidation processes within the geologic formation. These results can be used or transferred to enhance groundwater modelling efforts in other confined coastal aquifers of South America where scarcity of long-term monitoring data limits water resources planification under a changing climate. KEYWORDS Colombia, confined coastal aquifer, isotope and geochemical hydrology, mean groundwater ages, recharge areas and groundwater flow

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Isotope geochemistry and modelling of the multi-aquifer system in the eastern part of Lithuania

Cited by 16 publications

References 24 publications

Hydrogeochemical characterization and identification of a system of regional flow. Case study: the aquifer on the Gulf of Urabá, Colombia

Hydrogeochemical characterization and identification of a system of regional flow. Case study: the aquifer on the Gulf of Urabá, Colombia

The Novel Updates of the Hydrogeological Model of Latvia

Groundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer

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