Application of the tritium interface method for determining recharge rates to unconfined drift aquifers, I. Homogeneous case

Larson, Grahame J.; Delcore, Manrico R.; Offer, Stuart

doi:10.1016/0022-1694(87)90128-4

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…A significant percentage of these (e.g. von Buttlar, 1959; Vogel et al, 1974;Dincer et al, 1974;Rabinowitz et al, 1977;Gvirtzman and Magaritz, 1986;Delcore and Larson, 1987;Larson et al, 1987) have determined the depth of 'bomb-pulse' tritium in order to quantify infiltration rates. These studies were readily facilitated by the large concentration variations (i.e.…”

Section: Other Tritium Investigations (A Brief Overview)mentioning

confidence: 99%

Tritium in ground water of the georgia piedmont: Implications for recharge and flow paths

Rose

1992

Hydrological Processes

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Environmental tritium was measured in 33 natural water samples representative of precipitation, stream runoff, and groundwater (derived principally from production wells) within the Georgia Piedmont Province. Major ion analyses were used to assist in the interpretation of the tritium results. Tritium concentrations were significantly greater within shallow groundwater derived from the regolith (28-34 TU) and stream runoff (25-30 TU) than within recent rainfall (4-17 TU). Based upon the decay-corrected tritium input function, this probably indicates that at least some of the shallow water is stored within the regolith for a period of approximately 25 years.A 'post-bomb' component of recharge was present in all groundwater derived from production wells in the study area. Groundwater sampled from the bedrock aquifers was commonly less tritiated than either stream runoff or shallow water stored in the regolith. The lower tritium concentrations may have resulted from the mixing of 'pre-bomb' water stored within the fractures or the transitional zone directly above the bedrock and modern water stored in the shallow regolith. The preponderance of modern water provides evidence that groundwater flow paths are areally restricted within this setting, probably confined to local surface water drainage basins. The residence time of groundwater in the Piedmont is limited by the lack of deep, gravity-driven regional flow and the localized vertical flow induced by pumping. The results of this study indicate that relatively small tritium concentration variations (10-20 TU) may have regional hydrological significance in the southeastern Piedmont Province and similar settings.

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Section: Other Tritium Investigations (A Brief Overview)mentioning

confidence: 99%

Tritium in ground water of the georgia piedmont: Implications for recharge and flow paths

Rose

1992

Hydrological Processes

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“…At least two papers were published that dealt with the use of tracers introduced in part by natural processes. Larson et al (1987) measured the depth of penetration of H‐bomb‐derived tritium into the saturated zone of a glaciofluvial aquifer, which allowed them to calculate an average recharge rate of 34–41 cm per year. Their values agreed with estimates based on water budget analyses, and the authors suggested that their approach can be applied at many sites.…”

Section: Physical Measurements In the Saturated Zonementioning

confidence: 99%

Physical Measurements in Subsurface Hydrology

Dane

Molz

1991

Reviews of Geophysics

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“…Egboka, 1983;Larson et al, 1987;Robertson and Cherry, 1989). The tracer is also used to measure dispersion in groundwater (Atakan, 1972;Egboka, 1983), and diffusion in groundwater (Foster, 1975).…”

Section: H As Hydrologic Tracermentioning

confidence: 99%

Analysis of vadose zone tritium transport from an underground storage tank release using numerical modeling and geostatistics

Lee¹

1997

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Application of the tritium interface method for determining recharge rates to unconfined drift aquifers, I. Homogeneous case

Cited by 10 publications

References 33 publications

Tritium in ground water of the georgia piedmont: Implications for recharge and flow paths

Tritium in ground water of the georgia piedmont: Implications for recharge and flow paths

Physical Measurements in Subsurface Hydrology

Analysis of vadose zone tritium transport from an underground storage tank release using numerical modeling and geostatistics

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