Soil moisture - capacitance (EC-10)

From ExperimentalHydrologyWiki
Jump to: navigation, search
EC10.jpg

Contents

Parameter to be measured:

Soil moisture

Method:

Capacitance

ECHO Probe Profile along a Soil Proilfe
[[Image:]]

Equipment:

  • EC-5
  • EC-10 (ECH2O)
  • EC-20

Advantages:

  • Relatively cheap
  • Easy to install
  • Compatible with many loggers

Disadvantages:

  • Only for low salinity soils (Decagon has developed newer ECH2O probes that are less sensitive to salinity issues, e.g. the EC-5)
  • Calibration needed
  • Small measurement volume compared to other sensors

What to watch out for:

  • Temperature sensitivity
  • Careful installation, air gaps have a sustainable influence on the measurement compared to other sensors because of the small measurement volume

Problems/Questions:

Links

Projects that used the above equipment:

Other related web sites:

References

  • Bogena, HR; Huisman, JA; Oberdoerster, C; Vereecken, H. 2007. Evaluation of a low-cost soil water content sensor for wireless network applications. Journal of Hydrology, 344(1-2), 32-42, DOI: 10.1016/j.jhydrol.2007.06.032.
  • Chanzy, A., Gaudu, J.-G., Marloie, O. (2012): Correcting the Temperature Influence on Soil Capacitance Sensors Using Diurnal Temperature and Water Content Cycles. Sensors 12, 9773-9790, DOI: 10.3390/s120709773.
  • Saito, T; Fujimaki, H; Yasuda, H; Inoue, M. 2009. Empirical Temperature Calibration of Capacitance Probes to Measure Soil Water. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 73, 1931-1937, DOI: 10.2136/sssaj2008.0128.
Personal tools