[GeostatsGuy Lectures] Data Analytics: Spatial Heterogeneity

发布于 2022-08-25  223 次阅读


Could use any measure of dispersion.
- Variance
- Population variance average squared difference from the mean

\sigma^{2}=\frac{1}{N} \sum_{i=1}^{N}\left(x_{i}-\bar{x}\right)^{2}

  • Unbiased estimate of population variance from sample set

s^{2}=\frac{1}{N-1} \sum_{i=1}^{N}\left(x_{i}-\bar{x}\right)^{2}

  • Standard Deviation


Dykstra-Parsons Coefficient of Variation

Dykstra-Parsons Coefficient of Variation is a popular method for assessment of permeability variation:

Consider end members:
If \sigma_{k}^{2}=0 then k_{50}=k_{16} and V=0.0
V \leq 1.0 since k_{16} \geq 0.0

Lorenz Coefficient