Please use this identifier to cite or link to this item:
https://hdl.handle.net/11681/9337| Title: | Radar profiling of buried reflectors and the groundwater table |
| Authors: | Sellmann, P. V. (Paul V.) Arcone, Steven A. Delaney, Allan J. |
| Keywords: | Alaska Radar penetration (soils) Cold regions Radar reflectors Frozen soils Frozen ground Soils Ground water Radar Water supplies Water table |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | CRREL report ; 83-11. |
| Description: | CRREL Report Abstract: Investigations of ground radar performance over thawed and seasonally frozen silts, and sands and gravels containing artificial and natural reflectors were carried out in Alaska. The radar emitted 5-10 ns pulses, the center frequency of which was approximately 150 MHz. The artificial reflectors were metal sheets and discs and the natural reflectors were the groundwater table and interfaces between frozen and thawed material. The water table was profiled at three sites where the subsurface material was coarse-grained alluvium. Dielectric constants of 16 to 18 were measured for the thawed silts, 6 to 7 for the frozen silts and 3 to 9 for the sands and gravels. Signal penetration in the thawed high moisture content silts may be achieved only by use of a lower frequency radar, whereas in the sands and gravels greater depths may be detected with more sophisticated signal processing. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/9337 |
| Appears in Collections: | CRREL Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-83-11.pdf | 1.06 MB | Adobe PDF |  View/Open |