Scientific Investigations Report 2006–5290
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5290
The authors would like to thank Donna Francy and Don Stoeckel, Ohio Water Science Center of the USGS, for their guidance and advice during the data analysis. The helpful comments and suggestions for the report provided by USGS colleagues is greatly appreciated. Also, the authors gratefully acknowledge the assistance of Frank Voss, Washington Water Science Center of the USGS, for compiling GIS data layers and maps for illustrating principal aquifers and well networks of the NAWQA program; and Robert Black, Washington Water Science Center of the USGS, for technical assistance with statistical applications.