8 Module Variogram Models; M. Makkawi, PhD
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Semivariogram Models• It is a mathematical expression that results from
curve fitting a function to the experimental variogram.
• Models are used to determine variogram parametersthat are necessary in both estimation (kriging) and conditional simulation procedures.
• Model variograms can be classified according to the presence or absence of sill into two groups:
• Models with sill (transition models)• Models without sill (drift or trend models)
8 Module Variogram Models; M. Makkawi, PhD
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Semivariogram Models
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Models with Sill
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Models with Sill
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Models without Sill
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Models without Sill
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Types of ContinuityContinuous Variogram
8 Module Variogram Models; M. Makkawi, PhD
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Types of ContinuityLinear Variogram
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Types of ContinuityNugget Variogram
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Types of ContinuityRandom Variogram
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Zone of InfluenceVariogram Ranges
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Zone of InfluenceGeologic Structure Ranges
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AnisotropyGeometric Anisotropy
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AnisotropyZonal Anisotropy
