Strontium isotopes as a tool for estimation of groundwater recharge and aquifer connectivity

Semhi, Khadija; Abdalla, Osman; Abri, Rashid Al; Al-Hosni, Talal; Clark, Ian D.

doi:10.1016/j.gsd.2016.11.001

Cited by 18 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strontium isotope ratios in rocks vary principally according to the Rb/Sr ratio . Thus, the Rb/Sr ratio in groundwater is a function of the type of host rock and its interaction with the groundwater . The high 87 Sr/ 86 Sr values for the Dameigou Formation water (0.713842) and the Quaternary groundwater (0.712140) suggest that water-rock interaction happened in these two formations, and the most probably reacted matrix is alumino-silicate minerals in the sediment with an average 87 Sr/ 86 Sr value of 0.720 for those originating from the continental crust .…”

Section: Resultsmentioning

confidence: 99%

Hydrogeochemical and Isotopic Indicators of Hydraulic Fracturing Flowback Fluids in Shallow Groundwater and Stream Water, derived from Dameigou Shale Gas Extraction in the Northern Qaidam Basin

Zheng

Hong-da

Chen

et al. 2017

Environ. Sci. Technol.

View full text Add to dashboard Cite

Most of the shale gas production in northwest China is from continental shale. Identifying hydrogeochemical and isotopic indicators of toxic hydraulic fracturing flowback fluids (HFFF) has great significance in assessing the safety of drinking water from shallow groundwater and streamwater. Hydrogeochemical and isotopic data for HFFF from the Dameigou shale formations (Cl/Br ratio (1.81 × 10-6.52 × 10), Ba/Sr (>0.2), δB (-10-1‰), and ε (56-65, where ε is the deviation of the Sr/Sr ratio from that of seawater in parts per 10)) were distinct from data for the background saline shallow groundwater and streamwater before fracturing. Mixing models indicated that inorganic elemental signatures (Br/Cl, Ba/Sr) and isotopic fingerprints (δB, ε) can be used to distinguish between HFFF and conventional oil-field brine in shallow groundwater and streamwater. These diagnostic indicators were applied to identify potential releases of HFFF into shallow groundwater and streamwater during fracturing, flowback and storage. The monitored time series data for shallow groundwater and streamwater exhibit no clear trends along mixing curves toward the HFFF end member, indicating that there is no detectable release occurring at present.

show abstract

Section: Resultsmentioning

confidence: 99%

Hydrogeochemical and Isotopic Indicators of Hydraulic Fracturing Flowback Fluids in Shallow Groundwater and Stream Water, derived from Dameigou Shale Gas Extraction in the Northern Qaidam Basin

Zheng

Hong-da

Chen

et al. 2017

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Hydro-geochemistry explains the formation of groundwater based quantitative comparison relationships as well as analysis of its element content, ionic balance and changes in hydro-chemical composition during water–rock interactions [ 21 , 22 ]. This method is often combined with multivariate statistics to identify groundwater pollution characteristics based on hydrogeologic investigations [ 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Identification of Groundwater Pollution Characteristics and Health Risk Assessment of a Landfill in a Low Permeability Area

Wang

Song

et al. 2021

IJERPH

View full text Add to dashboard Cite

The shallow weathering fissure groundwater in the red-bed area of Southwest China is usually the only drinking water source for most rural residents. In this study, a typical landfill with surrounding residents drinking unpurified groundwater in red-bed area was selected and water quality detection, groundwater numerical simulation and human health risk assessment were used to identify and assess groundwater pollution in the region. The chemical type evolved from HCO3-SO4-Ca-Mg and HCO3-SO4-Ca to Na-Ca-Cl-HCO3 contaminated by the landfill. Na+ and Cl− were selected as factors for rapid identification of groundwater pollution. Subsequent analyses using these factors showed that the leachate pollution plume boundary was 190 m downstream of the landfill. Analysis of the redox conditions revealed that the area from the landfill to 5 m downstream was the reduction zone, while the area beyond 5 m was the oxidation zone. The migration and attenuation patterns of inorganic salts (such as SO42−) and heavy metals (such as Fe and Mn) in the oxidation and reduction zones differed obviously. Meanwhile, the organic pollutants in the leachate were reduced and decomposed into organic acids, which caused the groundwater 80 m downstream of the landfill to become weakly acidic (pH ranged from 6.51 to 6.83), and promoted re-entry of adsorbed heavy metals (such as Pb) into the groundwater. The groundwater risk assessment based on human health revealed that lead, manganese, chlorobenzene, dichloroethane and chloroform constituted a major health threat to the residents. The rank of non-carcinogenic risk was lead >manganese, and the maximum area of non-carcinogenic risk was 15,485 m2. The total carcinogenic risk caused by organic pollutants was 7.9 × 10−6, and the area of the carcinogenic risk zone was 11,414 m2. Overall, the results of this study provide a scientific basis for management of drinking water and groundwater remediation in the red-bed area with low permeability.

show abstract

“…In groundwater samples from ophiolite aquifer, the 87 Sr/ 86 Sr ratio is higher than the values reported by Weyhenmeyer et al [32]. This is attributed to the absence of the carbonate rocks of the Hajar Super Group (HSG) in the study area, which according to Semhi et al [27] and Weyhenmeyer et al [32] marks the main source of recharge. In the study area, only the ophiolites are present, which when interact with the groundwater will release more Sr as opposed to the HSG.…”

Section: Strontiummentioning

confidence: 54%

“…The correlation between the ratio of 87 Sr/ 86 Sr and 1/Sr is a useful tool to identify the source rocks. Two mixing groundwater sources will show a strong positive correlation, whereas a poor correlation indicates that there are more than two groundwater sources [27]. The Sr concentration in the groundwater samples (17 samples) collected during this study varies from 0.02 to 2.17 mg/l, whereas the 87 Sr/ 86 Sr ratio remains unchanged except for 2 samples (E4, sample number 34, and farm 2 well 1, sample number 50).…”

Section: Strontiummentioning

confidence: 76%

“…In general, the groundwater chemistry evolves with increasing depth and proximity to the NOM as indicated in the Piper diagram ( Figure 2) signifying the role of water-3 Geofluids [20] adjacent to the study area, and in Tunisia [21]. Hydrochemical investigations of groundwater in Oman (e.g., [22][23][24][25][26][27][28]) have made a consensus that water-rock interaction is the primary factor controlling the groundwater chemistry with a secondary contribution from evaporation. The NOM marks the region of fresh water and groundwater salinity increases away from NOM with increasing mineral dissolution.…”

Section: Chemical Composition and Groundwater Classificationmentioning

confidence: 99%

See 1 more Smart Citation

Modern Recharge in a Transboundary Groundwater Basin Deduced from Hydrochemical and Isotopic Investigations: Al Buraimi, Oman

et al. 2018

View full text Add to dashboard Cite

Groundwater samples (54) collected from different geological units (alluvium, Tertiary, ophiolite, and Hawasina) located in the transboundary groundwater basin in north Oman at the United Arab Emirates (UAE) borders were analyzed for general hydrochemistry and water isotopes, and subsets thereof were analyzed for 14 C and 3 H and 87 Sr/ 86 Sr. The chemical composition, percentage of modern carbon (pmc), δ 2 H, δ 18 O, and 87 Sr/ 86 Sr of the groundwater in the study area progressively change from the recharge zone in the elevated area of the North Oman Mountains (NOM) to the flat plains at the UAE borders. While the water-rock interaction is the dominant process controlling the groundwater chemistry, evaporation and groundwater mixing affect the hydrochemistry at the UAE borders. Therefore, groundwater evolves from carbonate-dominant in the NOM into sodium chloride-dominant close to the UAE borders. It is also evident that groundwater lateral recharge from the ophiolites into the alluvium retains the chemical affinity of the ophiolites. Groundwater dating (high pmc), homogeneous 87 Sr/ 86 Sr ratios, and enriched δ 2 H and δ 18 O demonstrate the presence of modern recharge in the shallow zones of the ophiolites and alluvium. However, deep zones and areas at the UAE border contain older groundwater form during cooler and wetter climatic conditions as supported by the depleted δ 2 H and δ 18 O and lower 87 Sr/ 86 Sr ratios and pmc. Furthermore, the data clearly showed that modern groundwater mixes with older groundwater along the flow path from the NOM into the UAE border. Modern recharge occurs as lateral recharge from NOM and direct recharge in the plain area. The current findings support future development of aflaj system along NOM slopes and shallow wells in the plain areas.

show abstract

Strontium isotopes as a tool for estimation of groundwater recharge and aquifer connectivity

Cited by 18 publications

References 27 publications

Hydrogeochemical and Isotopic Indicators of Hydraulic Fracturing Flowback Fluids in Shallow Groundwater and Stream Water, derived from Dameigou Shale Gas Extraction in the Northern Qaidam Basin

Hydrogeochemical and Isotopic Indicators of Hydraulic Fracturing Flowback Fluids in Shallow Groundwater and Stream Water, derived from Dameigou Shale Gas Extraction in the Northern Qaidam Basin

Identification of Groundwater Pollution Characteristics and Health Risk Assessment of a Landfill in a Low Permeability Area

Modern Recharge in a Transboundary Groundwater Basin Deduced from Hydrochemical and Isotopic Investigations: Al Buraimi, Oman

Contact Info

Product

Resources

About