SOIL DENSITY STUDIES IN CONNECTION WITH DETECTION OF UNDERGROUND NUCLEAR EXPLOSIONS. PART 1 - NUCLEAR TECHNIQUES. PART 2 - THERMAL TECHNIQUES. PACKRAT, HARDHAT AND GNOME EVENTS
Abstract
Nuclear techniques: The continuous-reading Qualicon 502 bulk density gauge cannot be used effectively to detect density differences in the soil because of extreme sensitivity to height variations and soil micro-relief. The P-22 surface density gauge is suitable for detecting soil density differences. Effects of normal variations in local soil texture, structure and moisture content (weather conditions) will present serious problems in the use of any soil-density measuring instrumentation for detection of underground explosion areas and may invalidate their use. Thermal techniques: Although extreme back ground temperature contrasts may present thermal imaging problems, satisfactory imaging of a test area can be accomplished with good image detail during both day and night observations. The Packrat blast site was detectable on Thermograph T-2 thermal images during both day and night.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1962
- Accession Number
- AD0406377
Entities
Organizations
- United States Army Engineer Research and Development Laboratory