THE NUCLEAR METHOD OF SOIL-MOISTURE DETERMINATION AT DEPTH

NUCLEAR EQUIPMENT MANUFACTURED BY THE TROXLER ELECTRONIC LABORATORIES, INC. WAS USED TO MEASURE MOISTURE CHANGES AT DEPTH AT THREE DIFFERENT TEST SITES. MOISTURE CONTENTS WERE OBTAINED USING THE MANUFACTURER'S CALIBRATION CURVE, WHOSE ACCURACY WAS CHECKED IN THE FIELD BY COMPARING NUCLEAR AND GRAVIMETRIC RESULTS. EFFECT OF AIR GAP, THE REPRODUCIBILITY OF A NEUTRON COUNT, AND TIME AND TEMPERATURE EFFECTS WERE INVESTIGATED. THE MAJOR PROBLEM ASSOCIATED WITH THE NUCLEAR METHOD WAS CONCERNED WITH ACCESS-TUBE INSTALLATION. RESULTS SHOWED THAT THE NUCLEAR METHOD OF SOIL-MOISTURE DETERMINATION WAS FAST AND EFFICIENT. THE ACCURACY OF THE METHOD WAS FOUND TO BE SATISFACTORY WHEN COMPARED TO GRAVIMETRIC RESULTS, AND RECALIBRATION OF THE NUCLEAR EQUIPMENT WAS NOT FOUND TO BE NECESSARY. THE NUCLEAR METHOD IS RECOMMENDED FOR STUDIES CONCERNED WITH THE MEASUREMENT OF SOIL-MOISTURE CHANGES AT DEPTH. /AUTHOR/

  • Corporate Authors:

    University of Texas, Austin

    Cockrell Hall
    Austin, TX  United States  78712

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Ehlers, C J
    • Reese, L C
    • Anagnos, J N
  • Publication Date: 1968-10

Subject/Index Terms

Filing Info

  • Accession Number: 00233731
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: 3-5-65-89
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jan 11 1971 12:00AM