CGRG Bibliography of Canadian Geomorphology
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Author : Berthold, S.; Bentley, L.R.; and Hayashi, M.
Date : 2003.
Title : Integrated hydrological and geophysical interpretation of water and solute cycling around prairie wetlands.
Publication : Canadian Geophysical Union. Annual Meeting, May 10 -14, 2003. Banff Centre, Banff, Alberta.
Issue :
Page(s) :
Abstract
Two- and three-dimensional electrical resistivity imaging (ERI) was used to investigate a conceptual model of water and solute cycling in a prairie wetland, located in the St. Denis National Wildlife Area in Saskatchewan. The data were acquired with standard multi-electrode equipment designed for 2-D applications. Sets of profiles measured in two perpendicular directions were combined to form a 3-D grid. The data sets were inverted to get a resistivity model of the subsurface using a least-squares, smoothness- constrained inversion technique. The resistivity models were compared to a conceptual model based on previous hydrologic and geochemical investigations. The ERI results were consistent with measured water chemistry and the conceptual model of water and salt cycling around prairie wetlands. Low electrical conductivity was found beneath the wetland indicating the leaching of salts from soil by depression-focused infiltration of snowmelt water. High electrical conductivity was found beneath the margin of the wetlands (Fig. 2), where evaporitic salt accumulation occurs. The 2-D and 3D- images revealed a complicated distribution of salts that presumably reflects complex hydrologic interactions between flow systems of adjacent wetlands.
Bibliography of Canadian Geomorphology