Sub-bottom Surveying in Lakes with Ground-Penetrating Radar
1992
Sellmann, Paul V. | Delaney, Allan J. | Arcone, Steven A.
Information on the properties and distribution of sediments and rock beneath lakes, rivers, and shallow backwaters is needed for geologic and engineering investigations. Harbor and channel projects, sedimentation studies and general characterization of sub-bottom materials have relied on acoustic methods because of their ability to penetrate the bottom. However, acoustic equipment can have difficulty in resolving gradational contacts and in penetrating gassy sediments, which can cause high attenuation. Previous freshwater investigations using radar have revealed sub-bottom information. This report discusses radar equipment that we assembled with consideration given to frequency, power, deployment and analysis of radiation patterns for maximum sub- bottom penetration.
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