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Killi Tı n ve Organik Toprakta Toprak Su içeri ğ inin Zaman Etkili Yans ı ma Ölçer TDR Kullan ı larak izlenmesi

Year 2002, Volume: 08 Issue: 02, 122 - 127, 01.05.2002
https://doi.org/10.1501/Tarimbil_0000000723

Abstract

Bu çal ış mada, zaman etkili yans ı ma ölçer TDR ve tansiyometreler, killi t ı n ve organik toprakla doldurulmu ş toprak kolonlar ı nda, toprak su içeri ğinde ve toprak su potansiyelindeki de ğ iş iklikleri zamana bağ l ı olarak izlemek için kullan ı lm ış lard ı r. Toprak kolonlar ı içerisindeki bu de ğ işiklikleri belirlemek için üç çubuklu TDR problar ı ve tansiyometreler 5, 15, 25, 35 ve 45 cm derinliklerine yerle ştirilmi şlerdir. Bu denemede, toprak su içeri ğ indeki ve toprak su potansiyelindeki değ işiklikler 20 mm h-1sabit h ı zla uygulanan 15 litre saf suyun ya ğ murlamas ı süresince ve sonras ı nda belirlenmi ştir. Killi t ı n toprakta su hareketi ba şlang ı çta h ı zl ı olmuş ve 15 cm derinli ğ inde ilk de ğ işiklik ilk yar ı m saat içerisinde belirlenmi ş , fakat sonra su hareketin yava şlad ığı gözlemlenmiştir. Organik toprakta ise derinli ğ e bağl ı olarak toprak su içeri ğ indeki de ğ işiklikler killi t ı n topraktaki ile kar şı laşt ı r ı ld ığı nda yava ş olmuştur. 15 cm derinli ğ indeki su içeri ğ indeki ilk de ğ işiklik ancak yağ murlaman ı n başlamas ı ndan 1 saat sonra gözlemlenmi ştir. 5 cm derinli ğ indeki en yüksek su içeriği % 48,6 ancak ya ğ murlaman ı n başlamas ı ndan yaklaşı k 2,5 saat sonra belirlenmiştir.

References

  • Alharti, A. and J. Lange, 1987. Soil water saturation: Dielectric determination, Water Resources Res. J. 23, 591-595.
  • Baker, J. M. and R. R. Allmaras, 1990. System for automating and multiplexing soil moisture measurement by time domain reflectometry, Soil Sci. Soc. Am. J. 54, 1-6, 1.
  • Dalton, F. N. and M. T. H. Van Genuchten, 1986. The timedomain reflectometry method for measuring soil water content and salinity, Geoderma, 38, 237-250.
  • Dobson, M. C., F. T. Ulaby, M. T. Hallikainen and M. A. El-Rayes, 1985. Microwave dielectric wave of wet soil, part 11: Dielectric mixing models, IEEE Transactions Geoscience Remote Sensing., 73, 616-623.
  • Heimovaara, T. J. and W. Bouten,1990. A computer-controlled 36 channel time domain reflectometry system for monitoring soil water contents, Water Resour. Res., 26, 2311-2316.
  • Herkelrath, W. N., S. P. Hamburg and F. Murpy, 1991.Automatic real-time monitoring of soil moisture in a remote field area with time domain reflectometry, Water Resour. Res. 27, 857-864.
  • Kachanoski, R. G., E. Pringle and A. L. Ward, 1992. A. Field measurements of soil travel times using time domain reflectometry, Soil Sci. Soc. Am. J., 56, 47-52.
  • Ledieu, J., P. De Ridder, P. De Clerck and S. Dauttebande, 1986. A method of measuring soil moisture by time domain reflectometry Journal of Hydrology, 88,319-328.
  • Michiels, P. and E. De Strooper, 1989. bepaling van het vochtgehalte van de bodem met behulp van time domain reflactometry. Theoretische beschouwingen. In: Hartmann R. Bodemfysica Basisprinciples (cursusnota's). Gent, Faculteit van de Landbouwwetschappen, P 50.
  • Patterson, D. E. and M. W. Smith, 1981. The measurement of unfrozen water content by TDR: Results from laboratory test, Can. Geotech. J. 18, 131-145.
  • Roth, K., R. Schulin, H. Flühler and W. Attinger, 1990. Calibration of time domain reflectometry for water content measurement using a composite dielectric approach, Water Resource Res. Vol. 26, No. 10, 2267-2273.
  • Topp, G. C., J. L. Davis and A.P. Annan, 1980. Electromagnetic determination of soil water content: measurements in coaxial transmission lines, Water Resour. Res. 16, 574-582.
  • Topp G. C., S. J. Zegelin and I. White, 2000. Impacts of the real and imaginary components of relative permittivity on time domain reflectometry measurements in soils. Soil Sci. Soc. Am. J. 64: (4) 1244-1252.
  • Vogeler, I., B. E. Clothier, S. R. Green, D. R. Scotter and R. W. Tilmann, 1996. Characterizing water and solute movement by time domain reflectometry and disk permeametry, Soil Sci. Soc. Am. J. 60, 5-12.
  • Ward A. L., R. G. Kachanoski and D. E. Elrick, 1994. Laboratory measurements of solute transport using time domain reflectometry, Soil Sci. Soc. Am. J. 58, 1031-1039.
  • Zegelin, S. J. and I. White, 1989. Improved field probes for soil water content and electrical conductivity measurement using time domain reflectometry, Water Resources Res., 25, 2367-2376.
  • Zegelin, S. J., I. White, G. and F. Rusell, 1992. A critique of the time domain reflectometry technique for determining field soil water content. Advances in measurement of soil physical properties: Bringing theory into practice, Soil Science Society America, Madison, WI, USA. Special Publication 30, 187-208.

Monitoring the Soil Water Content Using Time Domain Reflectometry in a Clay Loam and an Organic Soil

Year 2002, Volume: 08 Issue: 02, 122 - 127, 01.05.2002
https://doi.org/10.1501/Tarimbil_0000000723

Abstract

n the present study, Time Domain Reflectometry TDR and tensiometers were used to follow changes in soil water content and soil water pressure head over time in soil containers filled with a clay loam soil and an organic soil. The moisture content changes throughout the soil columns were determined by three-rod TDR probes and tensiometers inserted at the depths of 5, 15, 25, 35 and 45 cm. In the experiment, changes in soil water content and soil water pressure head were determined during and after the simulation of 15 L demineralized water applied at a constant rate of 20 mm hr-1 . The water movement through the clay loam soil was initially fast and the first moisture content change at the depth of 15 cm was detected during the first half an hour but later slow water movement was observed. For the organic soil, change in the moisture content with depth was slow compared with that of the clay loam soil. The first change in moisture content at the depth of 15 cm was observed after only 1 hour from the simulation of water. The highest moisture level, 48.6%, at the depth of 5 cm was determined only after approximately 2.5 hours later from the beginning of simulated rainfall.

References

  • Alharti, A. and J. Lange, 1987. Soil water saturation: Dielectric determination, Water Resources Res. J. 23, 591-595.
  • Baker, J. M. and R. R. Allmaras, 1990. System for automating and multiplexing soil moisture measurement by time domain reflectometry, Soil Sci. Soc. Am. J. 54, 1-6, 1.
  • Dalton, F. N. and M. T. H. Van Genuchten, 1986. The timedomain reflectometry method for measuring soil water content and salinity, Geoderma, 38, 237-250.
  • Dobson, M. C., F. T. Ulaby, M. T. Hallikainen and M. A. El-Rayes, 1985. Microwave dielectric wave of wet soil, part 11: Dielectric mixing models, IEEE Transactions Geoscience Remote Sensing., 73, 616-623.
  • Heimovaara, T. J. and W. Bouten,1990. A computer-controlled 36 channel time domain reflectometry system for monitoring soil water contents, Water Resour. Res., 26, 2311-2316.
  • Herkelrath, W. N., S. P. Hamburg and F. Murpy, 1991.Automatic real-time monitoring of soil moisture in a remote field area with time domain reflectometry, Water Resour. Res. 27, 857-864.
  • Kachanoski, R. G., E. Pringle and A. L. Ward, 1992. A. Field measurements of soil travel times using time domain reflectometry, Soil Sci. Soc. Am. J., 56, 47-52.
  • Ledieu, J., P. De Ridder, P. De Clerck and S. Dauttebande, 1986. A method of measuring soil moisture by time domain reflectometry Journal of Hydrology, 88,319-328.
  • Michiels, P. and E. De Strooper, 1989. bepaling van het vochtgehalte van de bodem met behulp van time domain reflactometry. Theoretische beschouwingen. In: Hartmann R. Bodemfysica Basisprinciples (cursusnota's). Gent, Faculteit van de Landbouwwetschappen, P 50.
  • Patterson, D. E. and M. W. Smith, 1981. The measurement of unfrozen water content by TDR: Results from laboratory test, Can. Geotech. J. 18, 131-145.
  • Roth, K., R. Schulin, H. Flühler and W. Attinger, 1990. Calibration of time domain reflectometry for water content measurement using a composite dielectric approach, Water Resource Res. Vol. 26, No. 10, 2267-2273.
  • Topp, G. C., J. L. Davis and A.P. Annan, 1980. Electromagnetic determination of soil water content: measurements in coaxial transmission lines, Water Resour. Res. 16, 574-582.
  • Topp G. C., S. J. Zegelin and I. White, 2000. Impacts of the real and imaginary components of relative permittivity on time domain reflectometry measurements in soils. Soil Sci. Soc. Am. J. 64: (4) 1244-1252.
  • Vogeler, I., B. E. Clothier, S. R. Green, D. R. Scotter and R. W. Tilmann, 1996. Characterizing water and solute movement by time domain reflectometry and disk permeametry, Soil Sci. Soc. Am. J. 60, 5-12.
  • Ward A. L., R. G. Kachanoski and D. E. Elrick, 1994. Laboratory measurements of solute transport using time domain reflectometry, Soil Sci. Soc. Am. J. 58, 1031-1039.
  • Zegelin, S. J. and I. White, 1989. Improved field probes for soil water content and electrical conductivity measurement using time domain reflectometry, Water Resources Res., 25, 2367-2376.
  • Zegelin, S. J., I. White, G. and F. Rusell, 1992. A critique of the time domain reflectometry technique for determining field soil water content. Advances in measurement of soil physical properties: Bringing theory into practice, Soil Science Society America, Madison, WI, USA. Special Publication 30, 187-208.
There are 17 citations in total.

Details

Primary Language English
Journal Section Research Article
Authors

Hasan Sabri Özturk This is me

Roger Hartmann This is me

Publication Date May 1, 2002
Submission Date May 1, 2002
Published in Issue Year 2002 Volume: 08 Issue: 02

Cite

APA Özturk, H. S., & Hartmann, R. (2002). Monitoring the Soil Water Content Using Time Domain Reflectometry in a Clay Loam and an Organic Soil. Journal of Agricultural Sciences, 08(02), 122-127. https://doi.org/10.1501/Tarimbil_0000000723

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