Soil moisture - TDR (TRIME tube access probe)
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Parameter to be measured:
Soil moisture
Method:
Trime TDR-method
Equipment:
- IMKO: T3 tube probe
Advantages:
- easy and fast measurement in access tube to the depth of the access tube
- manual as well as continuously logged measurements possible, but if logged measurement only in one depth
- accuracy comparable to neutron probes
Disadvantages:
- installation of access tube in gravel rich soils is complicated and the IMKO drill is useless in this soils.
What to watch out for:
- The measurement volume of the probe is not circularly around the probe. To measure the mean water content of one depth requires measurement in different directions.
Problems/Questions:
Links
Other related web sites:
- IMKO: [1]
References
Evett, SR, Tolk, JA, Howell, TQ 2006. Soil profile water content determination: Sensor accuracy, axial response, calibration, temperature dependence, and precision. Vadose Zone 5, 894–907.
Laurent, J-P, Ruelle, P, Delage, L, Zairi, A, Nouna, BB, Adjmi, T 2005. Monitoring Soil Water Content Profiles with a Commercial TDR System: Comparative Field Tests and Laboratory Calibration. Vadose Zone Journal 4, 1030–1036.