Difference between revisions of "Soil moisture/Electric Conductivity - FDR (WET Sensor)"
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| − | [[Image: Wetsensor. | + | [[Image: Wetsensor.jpg |right|500px|]] |
==Parameter to be measured:== | ==Parameter to be measured:== | ||
| − | Soil moisture, permittivity | + | *Soil moisture, permittivity |
| − | Indirect measurement of electric conductivity of pore water | + | *Indirect measurement of electric conductivity of pore water |
| − | Temperature | + | *Temperature |
==Method:== | ==Method:== | ||
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Other related web sites: | Other related web sites: | ||
| − | + | :[http://www.delta-t.co.uk/product-display.asp?id=WET-2%20Product&div=Irrigation%20and%20Horticulture Delta-T Devices] | |
| − | |||
==References== | ==References== | ||
| + | *[http://www.wageningenur.nl/en/Publication-details.htm?publicationId=publication-way-333434373931 Balendonck, J., Bruins, M.A., Wattimena, M.R., Voogt, W., Huys, A. (2005): WET-sensor pore water EC calibration for three horticultural soils, Acta Horticulturae 691, ISSN 0567-7572, 789 - 796]. | ||
| + | *Bouskila, F.,Persson, M., Berndtsson, R., Bahri, A. (2008), Soil water content and salinity determination using different dielectric methods in saline gypsiferous soil, HYDROLOG SCI J 53(1), 253-265. | ||
*Hamed, Y.,Samy, G., Persson, M. (2006), Evaluation of the WET sensor compared to time domain reflectometry, HYDROLOG SCI J 51(4),671-681. | *Hamed, Y.,Samy, G., Persson, M. (2006), Evaluation of the WET sensor compared to time domain reflectometry, HYDROLOG SCI J 51(4),671-681. | ||
| + | *Inoue, M., Ahmed, B.A., Saito, T., Irshad, M., Uzoma, K.C. (2008): Comparison of three dielectric moisture sensors for measurement of water in saline sandy soil, Soil Use and Management 24, 156–162, DOI: 10.1111/j.1475-2743.2008.00154.x. | ||
| + | *Kargas, G., Kerkides, P*, Seyfried, M, Sgoumbopoulou, A (2011): WET Sensor Performance in Organic and Inorganic Media with Heterogeneous Moisture Distribution, Soil Science Society of America Journal 75(4), 1244-1252, DOI: 10.2136/sssaj2010.0238. | ||
*Regalado, C.M., Ritter, A., Rodriguez-Gonzalez, R.M. (2007), Performance of the commercial WET capacitance sensor as compared with time domain reflectometry in volcanic soils, VADOSE ZONE J 6(3), 1539-1663. | *Regalado, C.M., Ritter, A., Rodriguez-Gonzalez, R.M. (2007), Performance of the commercial WET capacitance sensor as compared with time domain reflectometry in volcanic soils, VADOSE ZONE J 6(3), 1539-1663. | ||
| − | * | + | *Wu, J., Li, P., Qian, H., Fang, Y. (2014), Assessment of soil salinization based on a low-cost method and its influencing factors in a semi-arid agricultural area, northwest China, Environ Earth Sci., 71, 3465–3475, DOI: 10.1007/s12665-013-2736-x. |
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[[Category:Equipment]] | [[Category:Equipment]] | ||
[[Category: Soil Moisture]] | [[Category: Soil Moisture]] | ||
| + | [[Category:Electrical Conductivity]] | ||
| + | [[Category:Temperature]] | ||
Latest revision as of 08:54, 22 May 2015
Parameter to be measured:
- Soil moisture, permittivity
- Indirect measurement of electric conductivity of pore water
- Temperature
Method:
Frequency Domain Sensor
Equipment:
- Delta-T Device: WET Sensor with 3 rods of 600 mm length, HH2 display for manual reading or a data logger
Advantages:
- easy and fast measurement of punctual soil moisture and electric conductivity of soil pore water
- manual as well as continuously logged measurements possible
Disadvantages:
- Each sensor has to be calibrated
- careful application of probe in stony soils
- Underestimating of permitivity in media with low permitivity (ε > 40, clay and organic soils)
- unaccurate values in saturated media
What to watch out for:
- Good contact between probe and medium has to be proved
Problems/Questions:
Links
Other related web sites:
References
- Balendonck, J., Bruins, M.A., Wattimena, M.R., Voogt, W., Huys, A. (2005): WET-sensor pore water EC calibration for three horticultural soils, Acta Horticulturae 691, ISSN 0567-7572, 789 - 796.
- Bouskila, F.,Persson, M., Berndtsson, R., Bahri, A. (2008), Soil water content and salinity determination using different dielectric methods in saline gypsiferous soil, HYDROLOG SCI J 53(1), 253-265.
- Hamed, Y.,Samy, G., Persson, M. (2006), Evaluation of the WET sensor compared to time domain reflectometry, HYDROLOG SCI J 51(4),671-681.
- Inoue, M., Ahmed, B.A., Saito, T., Irshad, M., Uzoma, K.C. (2008): Comparison of three dielectric moisture sensors for measurement of water in saline sandy soil, Soil Use and Management 24, 156–162, DOI: 10.1111/j.1475-2743.2008.00154.x.
- Kargas, G., Kerkides, P*, Seyfried, M, Sgoumbopoulou, A (2011): WET Sensor Performance in Organic and Inorganic Media with Heterogeneous Moisture Distribution, Soil Science Society of America Journal 75(4), 1244-1252, DOI: 10.2136/sssaj2010.0238.
- Regalado, C.M., Ritter, A., Rodriguez-Gonzalez, R.M. (2007), Performance of the commercial WET capacitance sensor as compared with time domain reflectometry in volcanic soils, VADOSE ZONE J 6(3), 1539-1663.
- Wu, J., Li, P., Qian, H., Fang, Y. (2014), Assessment of soil salinization based on a low-cost method and its influencing factors in a semi-arid agricultural area, northwest China, Environ Earth Sci., 71, 3465–3475, DOI: 10.1007/s12665-013-2736-x.