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Groundwater age dating

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Post by Matt Herod Welcome to the first edition of groundwater speed dating.In today’s post I introduce you to a motley crew of isotopes and chemicals that hydrogeologists and geochemists use to date the age of groundwater.However, there are natural limits to this method because tritium decay and dispersion make it increasingly difficult to identify the bomb peak in groundwater.

PIERRE PERROCHET has twenty years of experience in the field of groundwater flow and transport modeling within various world-renowned research institutions.He teaches advanced hydrogeology, hydrogeochemistry, and environmental tracers.He has industry experience as a geologist and has authored several relevant publications. LEHR is the Senior Scientist on the Technical Advisory Board at Earthwater Global, LLC and a Senior Scientist at the Heartland Institute.Groundwater age is usually defined as the time between recharge at the water table to the time when groundwater was sampled.Groundwater age estimates are based on concentrations of environmental tracers (i.e., tracers derived from the atmosphere, as opposed to artificial tracers) in groundwater.His scientific interests focus on theoretical and computational developments related to hydro-thermo-chemical phenomena, with numerous applications to environmental and hydrogeological engineering issues.He is presently Professor at the Centre of Hydrogeology, University of Neuchâtel, Switzerland, where he teaches groundwater dynamics, transport processes, and mathematical modeling."This book does a good job of introducing the reader to the often-overlooked complexity interpreting the deceptively simple results of age dating." (Journal of Environmental Quality, March/April 2008) "…this book is the first to incorporate and synthesize the entire state of the art of the business of groundwater dating." (CHOICE, January 2007) "Presenting modern knowledge and cutting-edge research simply and clearly, 'Groundwater Age' will satisfy and stimulate both seasonal professionals and student novices alike." (Journal of the American Water Resources Association, August 2006) To apply for permission please send your request to [email protected] specific details of your requirements.The range of groundwater ages, and links to each groundwater age study, can be viewed by clicking on the location symbols in the map above.Note that some locations are generalized (samples may have been collected over a range of locations), and some studies are represented by multiple symbols because samples were collected at locations that were relatively far apart.Pumping could draw more water into the aquifer from recharge (not always an option) to replace what is lost, the water pumped could be from groundwater already stored in the aquifer, or it could be groundwater that was leaving the aquifer via discharge into a river or lake that is now diverted to your well.Another great reason to know the groundwater age is to assess the vulnerability of an aquifer to contamination.