USGS Groundwater Information: Hydrogeophysics Branch
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![[Animation: GPR data collected while water is draining out of a horizontal fracture.]](movie.gif)
Animation of GPR data collected while water is draining out of a horizontal fracture through the center of the granite block of rock (located at about 25 nanoseconds (ns). The granite block measures about 2 m in length, 1 m in width, and 1.5 m in height. The fracture is located roughly 80 cm from the top of the block. The GPR survey was conducted with the Geophysical Survey Systems, Inc., SIR-10A+ and 500 MHz. antennas.* Twenty-nine traces were collected; one every 5 cm along the top surface of the rock. The fracture contained about 14 Liters (L) of water when it was saturated.
U.S. Department of the Interior |
U.S. Geological Survey
URL: https://water.usgs.gov/ogw/bgas/rock/draining.html
Page Contact Information: Contact the Hydrogeophysics Branch
Page Last Modified: Wednesday, 28-Dec-2016 15:11:23 EST
