USGS Scientific Investigations Report 2012–5141  - Estimates of Tracer-Based Piston-Flow Ages of Groundwater from Selected Sites: National Water-Quality Assessment Program, 2006–10 

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Scientific Investigations Report 2012–5141 

National Water-Quality Assessment Program 

Estimates of Tracer-Based Piston-Flow Ages of Groundwater from Selected Sites: National Water-Quality Assessment Program, 2006–10 

By Stephanie D. Shapiro, L. Niel Plummer, Eurybiades Busenberg, Peggy K. Widman, Gerolamo C. Casile, Julian E. Wayland, and Donna L. Runkle

Contents

Conversion Factors, Datums, and Abbreviations and Acronyms

Approach Used in this Compilation

Tracer-Based Piston-Flow Ages and Related Information

Summary and Conclusions

References Cited

First posted July 31, 2012

Report PDF (17 MB)

Table 1 XLS (166 kB)
Table A1 XLS (21 kB)
Appendix B PDF (16 MB)
Appendix B tables XLS ZIP (2.9 MB)

For additional information contact:
Chief, National Water-Quality Assessment (NAWQA) Program
U.S. Geological Survey
413 National Center
12201 Sunrise Valley Drive
Reston, VA 20192
http://water.usgs.gov/nawqa/

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