Additionally, location of the mid-1960s bomb peak provides information on recharge rate (Schlosser and others, 1988, 1989; Solomon and Sudicky, 1991; Solomon and others, 1992, 1993; Ekwurzel and others, 1994).
Locating the position of the mid-1960s bomb peak is difficult due to the required high density of vertical sampling and, therefore, is often an impractical means of obtaining ground-water age information. Ekwurzel, B., Schlosser, P., Smethie, Jr., Plummer, L. L., Weppernig, R., and, Stute, M., 1994, Dating of shallow groundwater: Comparison of the transient tracers Kr: Water Resources Research, v.
Knowing the original amount of tritiated water that was ingested and the concentration, one can calculate the volume of water in the body.
As these substances are virtually inert in ground water, unaffected by ground-water chemistry and unaffected by contamination from most anthropogenic sources, He dating complements existing capabilities within the U. Geological Survey for dating of young ground water, such as, uses of chlorofluorocarbons and sulfur hexafluoride, and can be applied to dating water recharged since about 1965. B., 1993, Chlorofluorocarbons (CCl) as Dating Tools and Hydrologic Tracers in Shallow Ground Water of the Delmarva Peninsula, Atlantic Coastal Plain, United States: Water Resources Research, v. Several conditions are necessary to permit solving the helium isotope mass balance for ), after correction for dilution with old (low tritium) water, should be consistent with possible tritium-age relations for surface water or meteoric infiltration water of that age (see for example Figure 14 in Dunkle and others, 1993; Figure 7 in Ekwurzel and others, 1994; and Figure 7 in Plummer and others, 2000). If the atoms of H, or 3.24 picocuries per liter, p Ci/L. H, half-life of 12.43 years (Unterweger and others, 1980)) has provided an excellent tracer of young waters. Tritium input to ground water has occurred in a series of spikes following periods of atmospheric testing of nuclear devices that began in 1952 and reached a maximum in 1963-1964. Tritium measurements alone can be used to locate the depth of the mid-1960s bomb peak, but, because of radioactive decay, many samples may need to be collected and analyzed today to locate its position.