Tracing the decomposition of dissolved organic carbon in artificial groundwater recharge using carbon isotope ratios

Kortelainen, Nina M.; Karhu, Juha A.

doi:10.1016/j.apgeochem.2006.01.004

Cited by 41 publications

(27 citation statements)

References 18 publications

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“…In temperate climates such as in Finland, the isotopic composition of the local groundwater closely follows that of local precipitation (Kortelainen, 2007;Kortelainen and Karhu, 2004). The stable isotope method has been widely applied in Finland, especially to evaluate natural groundwater-surface water interaction (Rautio and Korkka-Niemi, 2011) and artificially enhanced surface water infiltration into aquifers (Kortelainen and Karhu, 2006;Hendriksson et al, 2012).…”

Section: Stable Isotope Oxygen and Hydrogen Analysismentioning

confidence: 99%

Confronting the vicinity of the surface water and sea shore in a shallow glaciogenic aquifer in southern Finland

Luoma

Okkonen

Korkka-Niemi

et al. 2015

Hydrol. Earth Syst. Sci.

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Abstract. The groundwater in a shallow, unconfined, lowlying coastal aquifer in Santala, southern Finland, was chemically characterised by integrating multivariate statistical approaches, principal component analysis (PCA) and hierarchical cluster analysis (HCA), based on the stable isotopes δ 2 H and δ 18 O, hydrogeochemistry and field monitoring data. PCA and HCA yielded similar results and classified groundwater samples into six distinct groups that revealed the factors controlling temporal and spatial variations in the groundwater geochemistry, such as the geology, anthropogenic sources from human activities, climate and surface water. High temporal variation in groundwater chemistry directly corresponded to precipitation. With an increase in precipitation, KMnO 4 consumption, EC, alkalinity and Ca concentrations also increased in most wells, while Fe, Al, Mn and SO 4 were occasionally increased during spring after the snowmelt under specific geological conditions. The continued increase in NO 3 and metal concentrations in groundwater indicates the potential contamination risk to the aquifer. Stable isotopes of δ 18 O and δ 2 H indicate groundwater recharge directly from meteoric water, with an insignificant contribution from lake water, and no seawater intrusion into the aquifer. Groundwater geochemistry suggests that local seawater intrusion is temporarily able to take place in the sulfate reduction zone along the freshwater and seawater mixed zone in the low-lying coastal area, but the contribution of seawater was found to be very low. The influence of lake water could be observed from higher levels of KMnO 4 consumption in wells near the lake. The integration of PCA and HCA with conventional classification of groundwater types, as well as with the hydrogeochemical data, provided useful tools to identify the vulnerable groundwater areas representing the impacts of both natural and human activities on water quality and the understanding of complex groundwater flow system for the aquifer vulnerability assessment and groundwater management in the future.

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Section: Stable Isotope Oxygen and Hydrogen Analysismentioning

confidence: 99%

Confronting the vicinity of the surface water and sea shore in a shallow glaciogenic aquifer in southern Finland

Luoma

Okkonen

Korkka-Niemi

et al. 2015

Hydrol. Earth Syst. Sci.

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“…Water from Lake Päijänne (9370 m 3 day −1 ) is conducted to the infiltration site through a water supply tunnel and is artificially recharged into the aquifer by pond infiltration through the permeable esker deposits. This artificial GW is accounting for 70 % of water intake from the Jäniksenlinna aquifer (Kortelainen and Karhu, 2006). GW flows towards the River Palojoki from the NW (mostly artificial GW) and SE (mostly natural GW) (Helmisaari et al, 2003) (Fig.…”

Section: Study Areamentioning

confidence: 99%

Vulnerability of groundwater resources to interaction with river water in a boreal catchment

Rautio

Kivimäki

Korkka-Niemi

et al. 2015

Hydrol. Earth Syst. Sci.

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Abstract.A low-altitude aerial infrared (AIR) survey was conducted to identify hydraulic connections between aquifers and rivers and to map spatial surface temperature patterns along boreal rivers. In addition, the stable isotopic compositions (δ 18 O, δD), dissolved silica (DSi) concentrations and electrical conductivity of water in combination with AIR data were used as tracers to verify the observed groundwater discharge into the river system in a boreal catchment. Based on low temperature anomalies in the AIR survey, around 370 groundwater discharge sites were located along the main river channel and its tributaries (203 km altogether). On the basis of the AIR survey, the longitudinal temperature patterns of the studied rivers differed noticeably. The stable isotopes and DSi composition revealed major differences between the studied rivers. The groundwater discharge locations identified in the proximity of 12 municipal water intake plants during the low-flow seasons should be considered as potential risk areas for water intake plants during flood periods (groundwater quality deterioration due to bank infiltration), and should be taken under consideration in river basin management under changing climatic situations.

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“…As such, the C isotope composition of DIC -which strongly correlates with TDS (Table 1a) -differentiates local water that has recharged through a soil zone (low d 13 C values) from imported water that has recharged through the ponds. The DOC in the pond water is relatively low, ranges from 1.3 to 3.9 mg/L as C, so the increase in DIC (Table 1a) and the decrease in d 13 C observed in groundwater wells cannot be attributable solely to decomposition of organic matter (Kortelainen and Karhu, 2006).…”

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confidence: 99%

California GAMA Special Study: Ion exchange and trace element surface complexation reactions associated with applied recharge of low-TDS water in the San Joaquin Valley, California

McNab¹,

Singleton²,

Moran³

et al. 2010

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Executive SummaryUnder the Special Studies portion of the State Water Resources Control Board's Groundwater Ambient Monitoring and Assessment (GAMA) program, water quality topics of statewide relevance are addressed through focused research studies carried out in collaboration with Lawrence Livermore National Laboratory. The study described here addresses changes in groundwater quality associated with managed aquifer recharge of high quality water.Managed aquifer recharge, including the storage of potable water in accessible aquifers as an alternative to surface reservoir storage, is a valuable water resource management tool for water purveyors. Managed recharge usually entails the infiltration of water that is out of chemical equilibrium with local aquifer minerals, potentially resulting in mineral reactions, redox reactions, and trace element mobilization that can affect water quality and local aquifer permeability. Improvements to recharge water quality (e.g., remineralization of organic material, removal of organic compounds, denitrification) have been observed with recharge of agricultural return water and wastewater. In contrast, water quality changes associated with managed recharge of high quality surface water, e.g. Sierra Nevada runoff containing very low total dissolved solids (TDS), have received less attention.The objective of this study was to understand the geochemical interactions of high quality, imported recharge water with underlying aquifer materials associated with a four-year-old managed aquifer recharge project underway near Stockton, California, U.S.A. in California's San Joaquin Valley. The study employed advanced analytical methods to delineate mixing of ambient groundwater and recharge water in the subsurface, including both an introduced dissolved gas tracer and groundwater age dating (He method). This information, used in concert with extensive major ion, trace element, and isotopic data, allowed development of a geochemical model that provides a framework for interpreting the geochemical response of the local groundwater system to recharge of imported water.The study site, operated by Stockton East Water District (SEWD), consists of ponds adjacent to agricultural fields and a surface water treatment plant. Approximately 7000 acre-ft of imported water from New Melones and New Hogan reservoirs are recharged annually. Wells adjacent to the pond had tracer detections 6 to 11 days after the peak tracer detection in the pond, while nested monitoring wells downgradient had detections after 17 days. Production wells screened below semi-confining units had no tracer detections and had groundwater ages indicating that produced water recharged at least several decades ago.Overall groundwater quality in the area is very good, with <17 mg/L nitrate (as NO 3 -), total organic carbon < 1 mg/L, and a low frequency of detection of low level volatile organic compounds. Major element chemistry of recharged water is controlled by 1) mixing between low TDS recharge water and higher TDS ambient groundwat...

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Tracing the decomposition of dissolved organic carbon in artificial groundwater recharge using carbon isotope ratios

Cited by 41 publications

References 18 publications

Confronting the vicinity of the surface water and sea shore in a shallow glaciogenic aquifer in southern Finland

Confronting the vicinity of the surface water and sea shore in a shallow glaciogenic aquifer in southern Finland

Vulnerability of groundwater resources to interaction with river water in a boreal catchment

California GAMA Special Study: Ion exchange and trace element surface complexation reactions associated with applied recharge of low-TDS water in the San Joaquin Valley, California

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