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April 2011 BAPG Monthly Meeting

  • April 20, 2011
  • 5:30 PM - 9:59 PM
  • Banchetti by Rizzo's 550 North French Road Amherst, NY 14228

Registration

  • Active and Associate Members early bird registration fee.
  • Registration cost after early bird registration date.
  • All Non-members
  • All Non-Members after early bird registration deadline
  • Student Cost for early bird registration must show valid student ID.
  • Student price after early bird registration window. Must show valid student ID

Registration is closed

Abstract

Geophysical and temperature measurements were used to identify hydrostratigraphicfeatures that control groundwater/surface water interactions in a peat-dominated wetland/stream complex.  Using these combined measurement techniques, we identified features that control the distribution of springs, ponds, and stream discharge zones within the wetland.  Ground penetrating radar (GPR) surveys were used to image the distribution of peat within the wetland.  A fiber optic-based distributed temperature sensor was used to measure changes in streambed temperature along the length of the stream.  Variations between groundwater and surface water temperature were used to identify focused zones of groundwater discharge as well as larger gaining and losing reaches.  Variations in the thickness of the peat, especially abrupt changes in slope, appear to correspond to the location of springs and ponds at the wetland surface.  Based on these observations we propose a conceptual model to explain the relation between the changes in hydrostratigraphiclayers and the position of springs and ponds.  Hypothesis testing using numerical groundwater flow simulations shows potential groundwater flow paths that may support the formation of springs and ponds.

Bio

Chris Lowry is currently an assistant professor in the department of geology at the University at Buffalo.  Chris is a native of southern California but has spent the last ten years in the Midwest attempting to acclimate to the Buffalo climate.  He has a bachelor’s degree in Physics from Pacific Union College and a MS and PhD in Geology from University of Wisconsin-Madison.  The focus of his group’s research at UB is on quantifying controls on groundwater flow in wetland and riparian ecosystems.

Map of Banchetti's by Rizzo's
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