| Abstract: | The 3H-3He dating method is applied in a buried-valley aquifer near Dayton, Ohio. The study area is large, not all sampling locations lie along well-defined flow paths, and existing wells with variable screen lengths and diameters are used. Reliable use of the method at this site requires addressing several complications: (1) The flow system is disturbed because of high pumping rates and induced infiltration; (2) tritium contamination is present in several areas of the aquifer; and (3) radiogenic helium concentrations are elevated in a significant number of the wells. The 3H-3He ages are examined for self-consistency by comparing the reconstructed tritium evolution to the annual weighted tritium measured in precipitation; deviations result from dispersion, tritium contamination, and mixing. The 3H-3He ages are next examined for consistency with chlorofluorocarbon ages, the agreement is poor because of degradation of CFCs. Finally, the 3H-3He ages are examined for consistency with the current understanding of local hydrologic processes; the ages are generally supported by hydrogeologic data and the results of groundwater flow modeling coupled with particle-tracking analyses. |
| Genre: | Article |
| ProdID: | 70020360 |
| Citation Author: | Shapiro, S. D.; Rowe, G.; Schlosser, P.; Ludin, A.; Stute, M. |
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| Citation End Page: | 1180 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Water Resources Research |
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| Citation Number Of Pages: | 16 |
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| Citation Search Results Text: | Tritium-helium 3 dating under complex conditions in hydraulically stressed areas of a buried-valley aquifer; 1998; Article; Journal; Water Resources Research; Shapiro, S. D.; Rowe, G.; Schlosser, P.; Ludin, A.; Stute, M. |
| Citation Start Page: | 1165 |
| Citation Volume: | 34 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Tritium-helium 3 dating under complex conditions in hydraulically stressed areas of a buried-valley aquifer; 1998; Article; Journal; Water Resources Research; Shapiro, S. D.; Rowe, G.; Schlosser, P.; Ludin, A.; Stute, M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1998 00:00 -0600 |
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