BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:0 UID:UW-Physics-Event-2080 DTSTART:20110201T180000Z DURATION:PT1H0M0S DTSTAMP:20260420T145931Z LAST-MODIFIED:20110121T163733Z LOCATION:4274 Chamberlin Hall SUMMARY:Spatial and Temporal Variability in Groundwater Chemistry: Is There Any Such Thing as a "Representative" Sample?\, Chaos & Complex S ystems Seminar\, Jean Bahr\, UW-Madison Dept of Geoscience DESCRIPTION:The dissolved constituents found in groundwater have been of interest for over two centuries. In fact many of the early developm ents in analytical chemistry were motivated by requests from physician s who were interested in the composition of springs and spas that had presumed therapeutic benefits. More recently\, public attention to gro undwater chemistry has focused on constituents that are associated wit h health hazards such as arsenic and hexavalent chromium. In addition to its relevance to human health\, water chemistry data provide hydrog eologists with clues to the complex subsurface structures and processe s that control groundwater flow and water-rock interactions. A major c hallenge to interpreting these data is posed by the spatial and tempor al variability of measured concentrations. This talk will discuss seve ral case studies in which high resolution sampling and tracer experime nts have been used to document the effects of complex flow fields and subsurface reactions on the chemical signatures we observe in groundwa ter samples.
URL:https://www.physics.wisc.edu/events/?id=2080 END:VEVENT END:VCALENDAR