Difference between revisions of "Soil moisture - capacitance (EC-10)"
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* Only for low salinity soils (Decagon has developed newer ECH<sub>2</sub>O probes that are less sensitive to salinity issues, e.g. the EC-5) | * Only for low salinity soils (Decagon has developed newer ECH<sub>2</sub>O probes that are less sensitive to salinity issues, e.g. the EC-5) | ||
* Calibration needed | * Calibration needed | ||
| + | * Small measurement volume compared to other sensors | ||
==What to watch out for:== | ==What to watch out for:== | ||
* Temperature sensitivity | * 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:== | ==Problems/Questions:== | ||
| Line 28: | Line 30: | ||
==Links== | ==Links== | ||
Projects that used the above equipment: | Projects that used the above equipment: | ||
| − | + | *[http://www.gfz-potsdam.de/pb5/pb54/projects/Hygra/content.html HYGRA – The effect of water storage variations on in-situ gravity measurements and their use for hydrology] | |
| − | HYGRA | ||
Other related web sites: | Other related web sites: | ||
| − | *[http://www.decagon.com/ | + | *[http://www.decagon.com/assets/Manuals/Manual-Soil-Moisture-Sensor-Ech2o.pdf EC-5, EC-10, EC-20 Manual] |
| − | [http://www.decagon.com/ | + | *[http://www.decagon.com/assets/Uploads/Calibration-Equations-for-the-ECH2O-EC-5-ECH2o-TE-and-5TE-Sensors.pdf Calibration Equations or the ECH2O EC-5, ECH2O-TE and 5TE Sensors] |
| − | *http://www.decagon.com/ | + | *[http://www.decagon.com/assets/Uploads/EC-5-Volume-of-Sensitivity.pdf EC-5 Volume of Sensitivity] |
*[http://www.czen.org/files/2004_ECH2O_calibration_summary.ppt USGS ECH2O calibration summary] | *[http://www.czen.org/files/2004_ECH2O_calibration_summary.ppt USGS ECH2O calibration summary] | ||
*[http://www.czen.org/files/ECH2O%20calibration%20protocol_CZEN.doc USGS ECH2O probe calibration protocol (destructive harvest)] | *[http://www.czen.org/files/ECH2O%20calibration%20protocol_CZEN.doc USGS ECH2O probe calibration protocol (destructive harvest)] | ||
| + | *[http://www.sowacs.com sowacs.com] - the central resource for soil moisture measurement | ||
==References== | ==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): [http://www.mdpi.com/1424-8220/12/7/9773 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. | ||
[[Category:Equipment]] | [[Category:Equipment]] | ||
[[Category:Soil Moisture]] | [[Category:Soil Moisture]] | ||
Latest revision as of 10:38, 23 July 2012
Parameter to be measured:
Soil moisture
Method:
Capacitance
[[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:
- EC-5, EC-10, EC-20 Manual
- Calibration Equations or the ECH2O EC-5, ECH2O-TE and 5TE Sensors
- EC-5 Volume of Sensitivity
- USGS ECH2O calibration summary
- USGS ECH2O probe calibration protocol (destructive harvest)
- sowacs.com - the central resource for soil moisture measurement
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.