THE NUCLEAR METHOD OF SOIL-MOISTURE DETERMINATION AT DEPTH

MOISTURE CHANGES AT DEPTH AT THREE DIFFERENT TEST SITES WERE MEASURED. MOISTURE CONTENTS WERE OBTAINED USING THE MANUFACTURER'S CALIBRATION CURVE, WITH THE ACCURACY OF THE CURVE CHECKED IN THE FIELD BY COMPARING NUCLEAR AND GRAVIMETRIC RESULTS. THE EFFECT OF AIR GAP, THE REPRODUCIBILITY OF A NEUTRON COUNT, AND TIME AND TEMPERATURE EFFECTS WERE ALSO INVESTIGATED. THE MAJOR PROBLEM ASSOCIATED WITH THE NUCLEAR METHOD DURING THE INVESTIGATION WAS CONCERNED WITH ACCESS-TUBE INSTALLATION; A POSSIBLE SOLUTION OF THE PROBLEM IN SOIL CONTAINING GRAVEL IS DISCUSSED. THE ACCURACY OF THE NUCLEAR METHOD WAS FOUND TO BE SATISFACTORY WHEN COMPARED TO GRAVIMETRIC RESULTS, AND RECALIBRATION OF THE NUCLEAR EQUIPMENT WAS NOT NECESSARY. THE NUCLEAR METHOD IS RECOMMENDED FOR STUDIES CONCERNED WITH THE MEASUREMENT OF SOIL-MOISTURE CHANGES AT DEPTH. /AUTHOR/

• Supplemental Notes:
  • Res Rpt 89-4, 67 PP
• Corporate Authors:

  University of Texas, Austin

  Cockrell Hall
  Austin, TX  United States  78712
• Authors:
  • Ehlers, C J
  • Reese, L C
  • Anagnos, J N
• Publication Date: 1969-6

Subject/Index Terms

• TRT Terms: Accuracy; Alternatives analysis; Calibration; Depth; Gravimetric analysis; Moisture content; Neutrons; Nuclear tests; Soils; Temperature; Test procedures; Time
• Uncontrolled Terms: Reproducibility
• Old TRIS Terms: Air gaps; Gravimetric analyses
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216958
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 15 1970 12:00AM