A Multilevel Device for Ground‐Water Sampling and Piezometric Monitoring

Pickens, J. F.; Cherry, John A.; Grisak, G. E.; Merritt, W. F.; Risto, B. A.

doi:10.1111/j.1745-6584.1978.tb03244.x

Cited by 93 publications

(31 citation statements)

References 2 publications

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“…The 3H concentrations in precipitation at Ottawa, Canada, showed annual variations be tween 1953and 1978(IAEA Tech. Reps., 1953to 1978.…”

Section: Resultsmentioning

confidence: 99%

“…1 The monitoring and sampling network com prise multilevel samples (PICKENS et al, 1978) and bundle piezometers (EGBOKA, 1980 andMACFARLANE et al, 1980). These were installed at various localised depths in the groundwater flow systems, and at many locations to enable the establishment of well-defined boundaries of the isotopes and dissolved geochemical con stituents.…”

mentioning

confidence: 99%

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Distribution patterns of bomb tritium, chloride, sulphate, oxygen - 18 and deuterium, in two shallow sand aquifers.

Egboka

1981

Geochem. J.

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“…The 3H concentrations in precipitation at Ottawa, Canada, showed annual variations be tween 1953and 1978(IAEA Tech. Reps., 1953to 1978.…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Distribution patterns of bomb tritium, chloride, sulphate, oxygen - 18 and deuterium, in two shallow sand aquifers.

Egboka

1981

Geochem. J.

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“…The network enabled the establishment of well-defined boundaries of 3 H and other geochemical constituents, the age, and the directions of flows for the Borden and Pinawa aquifers. Multilevel samplers (Pickens et al, 1978) and bundle piezometers (Fig.2) with small-diameter intake zones provided samples from the tubes and piezometers respectively. Sampling was carried out at narrowly-spaced depth-intervals, thereby ensuring that little or no mixing occurred between groundwaters of different age zones and strata.…”

Section: Cfb Borden and Wnre Aquifersmentioning

confidence: 99%

“…These problems adversely affect interpretations and conclusions based on 3 H data. The modern monitoring devices designed at Waterloo, Canada (Pickens et al, 1978; and extensively used in various field studies have avoided groundwater mixing YEAR Fig. 1 Tritium in monthly precipitation at Ottawa, Canada (Egboka et al, 1983). problems.…”

Section: Introductionmentioning

confidence: 98%

Appropriate monitoring techniques using bomb tritium and other geochemical parameters in hydrogeological investigations

Egboka

1985

Hydrological Sciences Journal

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A critical review of earlier uses of bomb tritium spotlights problems in its applications that may result in erroneous interpretations. The old monitoring technique using boreholes causes mixing of groundwaters of different age zones. In this study, the mixing problem is overcome by using modern monitoring devices of multi-level samplers and bundle piezometers that yield groundwater samples of small volumes at closely-spaced intervals. The old method may be used to determine recharge and discharge areas of aquifers and used where pollution poses no serious threat. Otherwise, the major pumpage of the aquifer distorts and reverses flow directions, causes mixing of different waters and may spread the pollutants. The disadvantages of the modern method include its restricted use in shallow aquifers and porous media.Techniques de surveillance appropriées utilisant le tritium et autres paramètres géochimiques dans les recherches hydrogéologiques RESUME Une revue critique des premières utilisations du tritium met en lumière un certain nombre de problèmes dans ses applications qui peuvent donner lieu à des interprétations erronées. La technique ancienne de surveillance qui utilise des trous de sondages provoque le mélange d'eaux souterraines de zones de différents âges. Dans cette étude on évite le problème du mélange des eaux en utilisant des dispositifs modernes de surveillance avec prises d'échantillons à plusieurs niveaux et piezomètres en faisceaux qui fournissent des échantillons d'eau de faible volume pris à des profondeurs très rapprochées. L'ancienne méthode peut être employée pour déterminer les zones de recharge et d'écoulement des aquifères et être utilisée également là où la pollution n'est pas une sérieuse menace. D'autre part, le pompage important dans l'aquifère dévie et même renverse la direction de l'écoulement, provoque le mélange d'eaux de natures différentes et peut disperser les produits polluants. Les désavantages de la méthode moderne comportent les restrictions de son emploi dans le cas de nappes peu profondes et de milieux poreux. 207Downloaded by [84.232.5.230]

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“…29,30 Moreover the system can be applied to meet the need of complex contaminant migration patterns. 31 Here, a simple inexpensive system for sample collection combined with TiO2/SiO2 phosphorimetric test kits was fabricated for the detection of H2O2 concentration at many levels in simulated water.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Multi-sits Determination of H2O2 in Vertical Water Based on Phosphor TiO2/SiO2 Nanocomposite

et al. 2016

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A promising strategy for trace analysis of hydrogen peroxide (H2O2) in natural water was established based on solid substrate room temperature phosphorimetry. The use of TiO2/SiO2 composite material as a phosphor for H2O2 detection was investigated. TiO2/SiO2 nanoparticle material was manufactured into a test kit for synchronous multilevel sampling test in the water sample reservoir. The proposed TiO2/SiO2 test kit displayed a wide linear response to H2O2 concentrations ranging from 1.0 × 10 -6 to 1.0 × 10 -1 M with a detection limit of 4.6 × 10 -7 M. When the concentration of other species was 100 times of 1.0 × 10 -4 M H2O2, the proposed test kit exhibited good selectivity toward the coexistence of 20 foreign ions. Satisfactory agreement between the proposed kit and spectrophotometric method was obtained, which demonstrated the possibility of its further development into a promising commercial phosphorescence sensor.

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A Multilevel Device for Ground‐Water Sampling and Piezometric Monitoring

Cited by 93 publications

References 2 publications

Distribution patterns of bomb tritium, chloride, sulphate, oxygen - 18 and deuterium, in two shallow sand aquifers.

Distribution patterns of bomb tritium, chloride, sulphate, oxygen - 18 and deuterium, in two shallow sand aquifers.

Appropriate monitoring techniques using bomb tritium and other geochemical parameters in hydrogeological investigations

Synchronous Multi-sits Determination of H2O2 in Vertical Water Based on Phosphor TiO2/SiO2 Nanocomposite

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