Magazine of the Korean Society of Agricultural Engineers (한국농공학회지)

The Korean Society of Agricultural Engineers (한국농공학회)
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Experimental on the Accuracy of Soil Water Content Measurement Using TDR

TDR을 이용한 토양함수비 측정의 정확성에 대한 실험

  • 윤춘경 (건국대학교 농업생명과학대학)
  • Published : 1999.02.01
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Abstract

Laboratory experiment was performed for the TDR to measure the soil moisture, and the results, were compared with the design water content and the one measured by oven-try method. Sand and kaolinite were used . Varaiables for the experiment were water content (10-50%), void ration (0.7 -1.3), mixture rate of kaolinite (10-30%), and measurement methods (TDR and oven-dry). In all cases , TDR method showed very accurage and reliable results , and average error and error range were far lews than the oven-dry method which is widely used. Considerable error was noticed when water contnet was 50% where saturation was achieved for both methods. Therefore, TDR was thought to be applicable to the field moisture measurement if it is unsaturated. For field scale application of TDR, more research and verification of the accuracy with diverse soil conditions including physical ,chemical and mineral properties are recommended.

Keywords

References

  1. 비포화 영역에서 용존 오염물질 거동에 관한 실험적 연구 박재현
  2. 한국수자원학회논문집 v.30 no.6 TDR을 이용한 토양함수량의 측정 박재현;윤성용;김상준;선우중호
  3. 한국농공학회지 v.38 no.4 TDR을 이용한 토양함수량과 토양염도의 측정 정상옥
  4. Canadian Geotechnical Journal v.24 Measurement of Soil Water Content Using the Combined Time Domain Reflectometry Thermal Conductivity Probe Baker. T. H. W.;Goodrich. L. E.
  5. Water Resour. Res. v.27 Automatic real time monitoring of soil moisture in a remote field area with TDR Herkerlra, W. N.;Mamburg, S. P.;Murpfy, F.
  6. Econ. Environ. Geol. v.29 no.6 Application of an automated time domain reflectometry to solute transport study at field scale : Experimental methodologey and calibration of TDR Kim, D. J.
  7. Econ. Environ. Geol. v.29 no.6 Application of an automated time domain reflectometry to solute transport study at field scale : Transport concept Kim, D. J.
  8. Canadian Society of Soil Science Topp, G. C.;Carter, M. R.(ed.)
  9. Advances in irrigation v.3 Time domain reflectometry(TDR) and its application to irrigation scheduling Topp, G. C.;Davis, J. L.;Hillel, D.(ed.)
  10. Water Resour. Res. v.16 Electromagnetic determination of soil water content : Measurement in coaxial transmission lines Topp, G. C.;Davis, J. L.;Annan, A. P.