STUDY ON THE APPLICATION OF DIFFERENT MODELS FOR ESTIMATION OF MOISTURE CHARACTERISTIC CURVES

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DARBANDI S.; NEYSHABOURI M.R.; NAZEMI A.H.

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Journal: JOURNAL OF AGRICULTURAL KNOWLEDGE Year:2006 | Volume:15 | Issue:4 Page(s): 41-52

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Title

STUDY ON THE APPLICATION OF DIFFERENT MODELS FOR ESTIMATION OF MOISTURE CHARACTERISTIC CURVES

Author(s)

DARBANDI S. | NEYSHABOURI M.R. | NAZEMI A.H. | Issue Writer Certificate

Keywords

CHARACTERISTIC CURVEQ4

UNSATURATED SOILQ4

WATER AND SOILQ4

Abstract

Soil moisture- matric potential relation which is affected by hysterias is recognized as soil water CHARACTERISTIC CURVE. This curve is fundamentally important in soil physics because it demonstrates soil structure, porosity, pore size distribution and adsorption effects on soil water retention. In this investigation CHARACTERISTIC CURVEs of three different textures of soils were prepared by pressure plate apparatus. Then these curves were compared to Gupta and Larson, Grigson et al. and Van- Genuchten models, and the most convenient model was identified. The Gupta and Larson model with modified coefficients produced the closest agreement between the predicted and experimental curves comparing to others. The regression coefficients proposed by Gupta and Larson for the prediction of soil moisture content in particular matric suction seems may not be generalized for all soils. Gregson et al. model resulted in satisfactory prediction but only for the sandy soil in particular moisture content and with decreasing moisture content larger deviations between predicted and measured moisture suctions were occurred. Van- Genuchten model by modifying the constant from 1 to 0.7 as n =1/0.7-m, produced better agreement between the predicted and experimental O.7-m curve in the sandy- loam soil. While for the sandy and clay soils, deviation between the experimental and the predicted curve was large.

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APA: Copy

DARBANDI, S., NEYSHABOURI, M.R., & NAZEMI, A.H.. (2006). STUDY ON THE APPLICATION OF DIFFERENT MODELS FOR ESTIMATION OF MOISTURE CHARACTERISTIC CURVES. JOURNAL OF AGRICULTURAL KNOWLEDGE, 15(4), 41-52. SID. https://sid.ir/paper/28972/en

Vancouver: Copy

DARBANDI S., NEYSHABOURI M.R., NAZEMI A.H.. STUDY ON THE APPLICATION OF DIFFERENT MODELS FOR ESTIMATION OF MOISTURE CHARACTERISTIC CURVES. JOURNAL OF AGRICULTURAL KNOWLEDGE[Internet]. 2006;15(4):41-52. Available from: https://sid.ir/paper/28972/en

IEEE: Copy

S. DARBANDI, M.R. NEYSHABOURI, and A.H. NAZEMI, “STUDY ON THE APPLICATION OF DIFFERENT MODELS FOR ESTIMATION OF MOISTURE CHARACTERISTIC CURVES,” JOURNAL OF AGRICULTURAL KNOWLEDGE, vol. 15, no. 4, pp. 41–52, 2006, [Online]. Available: https://sid.ir/paper/28972/en

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