Use of Environmental Tracers to Evaluate Ground-Water Age and Water-Quality211 Trends in a Buried-Valley Aquifer, Dayton Area, Southwestern, Ohio

摘要

Chlorofluorocarbons (CFC method) and tritium and helium isotopes ((H-3 - He-3)211u001emethod) were used as environmental tracers to estimate ground-water age in 211u001econjunction with efforts to develop a regional ground-water flow model of the 211u001eburied-valley aquifer in the Dayton area, southwestern Ohio. This report 211u001edescribes results of CFC and water-quality sampling, summarizes relevant aspects