GSA Annual Meeting, November 5-8, 2001

Paper No. 0
Presentation Time: 9:00 AM

DETAILED GROUND-PENETRATING RADAR SURVEY OF A POINT-BAR, WHITEMAN’S CREEK, ONTARIO FOR USE IN A NEW FULLY-INTEGRATED 3D SURFACE / SUBSURFACE FLOW MODEL


BRUNNER, Derek S.1, ENDRES, A. L.2 and SUDICKY, E. A.2, (1)Earth Sciences, Univ of Waterloo, Waterloo, ON N2L 3G1, Canada, (2)Earth Sciences, Univ of Waterloo, Waterloo, ON N2l 3G1, Canada, dsbrunne@uwaterloo.ca

An intensive ground-penetrating radar (GPR) survey has been conducted over a point-bar of Whiteman’s Creek in Southern Ontario for the purpose of characterizing subsurface stratigraphy for input into a new fully-integrated 3D surface / subsurface flow model. A Sensors and Software pulseEKKO IV system with 100 and 200 MHz antennas was used to collect two sets of overlapping data on a 4m by 4m grid over an area of approximately 7500 square metres. Prominent subsurface features were correlated between GPR profiles. In addition, statistical correlations were performed, resulting in a multi-layered 3D block. Borehole and trench data are used to confirm boundary conditions and conductivities for use within the model. The final conceptual model represents the large-scale features and demonstrates the complexity involved in characterizing fluvial environments. Small-scale stratigraphy at the site will be interpreted more completely in a future study.