VISUALIZATION OF GPR STRATIGRAPHY FROM WAITES ISLAND IN NORTHEASTERN SOUTH CAROLINA

Waties Island is the first barrier island north of the 70 km long Grand Strand shoreline of northeastern South Carolina. To better view and map island stratigraphy, this study compiled 32 transects with over 13.8 trackline kilometers of GPR data from previous studies of the island into a single fence diagram. GPR transects were collected with both 100 and 200 MHz antennas. Processing of the data included gain, filtering, and surface normalization. Earlier collected Sensor and Software 100 MHz data were normalized by flattening the water table while GSSI 200 MHz data were surface normalized using GPS locations with GIS-extracted LIDAR elevations. Transects were placed in Fledermaus software for 3-D visualization of the data. The 3-D visualization of the integrated data as one fence diagram has afforded a better understanding of the stratigraphy of central core of the island and better definition of the orientation and dimension of channels formed to the north and south of the central core.