Fig. 8From: Reconstruction of sediment-transport pathways on a modern microtidal coast by a new grain-size trend analysis methodSemivariograms and fitted variogram models of principal components (PC1–PC3). The variogram models were fitted by the least-squares method, and the model that produces the fewest residual errors was chosen from among the Gaussian, spherical, and exponential models. The exponential model was used for PC1 and the spherical model for PC2 and PC3Back to article page