NEW APPROACHES TO THE LABORATORY AND FIELD MEASUREMENT OF SOIL SUCTION

There is now a large range of commercially available testing equipment for the measurement of soil suction. The transistor psychrometer developed in the past few years is proving to be an instrument with a wide range and the ability to test large numbers of soil samples quite rapidly. The upper range of this instrument has now been extended by experimentation to the point where it can measure air dry samples. The filter paper technique, which can also be used to cover the full range of soil suction, is now becoming more widely used as procedures are becoming more firmly established. To overcome the main problem of the measurement of the gain in mass of the filter paper a balance has been developed which can be used within the soil sample chamber. This promises to revolutionise the technique for both the laboratory and downhole measurement. Many sensors are now available for field use, some of which can be adapted from those in agriculture and horticulture. Tests on a number of these have been made and work is continuing on assessment of their range and accuracy. (A) For the covering abstract see IRRD 881647.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 667-71

Subject/Index Terms

Filing Info

  • Accession Number: 00729127
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 90-5410-583-6
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM