Groundwater age dating using tritium lovedatingagency com ua
Deeper groundwater sources can overcome the most common problems that arise from microbiological contamination of surface waters, shallow groundwaters and spring water.
According to the Drinking-Water Standards for New Zealand:2005 (DWSNZ:2005), a groundwater source is considered secure when it can be demonstrated that it is not likely to be contaminated by pathogenic organisms by satisfying the following conditions: Age dating yields an average age of the water as most groundwaters are mixtures of water with different ages.
H), and other chemical and isotopic substances in ground water, can be used to trace the flow of young water (water recharged within the past 50 years) and to determine the time elapsed since recharge.
Information about the age of ground water can be used to define recharge rates, refine hydrologic models of ground-water systems, predict contamination potential, and estimate the time needed to flush contaminants from ground-water systems.
These atmospheric substances, such as tritium (H) in water vapor from detonation of nuclear bombs in the 1950s and early 1960s,and chlorofluorocarbons (CFCs) from refrigeration and other uses from the 1950s through the 1980s, dissolve in precipitation, become incorporated in the Earths hydrologic cycle, and can be found in ground water that has been recharged within the past 50 years.
Approximately 350,000 people, more than half of Alaskas population, reside in the basin, mostly in the Anchorage area.
However, rapid growth is occurring in the Matanuska Susitna and Kenai Peninsula Boroughs to the north and south of Anchorage.
This document is also available in pdf format: fs-022-02(1.0 MB) The Cook Inlet Basin (Fig.
1) encompasses 39,325 square miles in south-central Alaska.