5. Conclusions
In this study, we analyzed SWC variability with landcover types, and
semivariance characteristics and spatial interpolation results using a
geostatistical method in 10 survey plots. Kriging interception was
conducted based on variogram analysis to characterize the spatial
structure of SWC in each plot. SWC declined from natural forest,
brushland, grassland, planted forest and mixed forest, whereas
non-significant tendency was found alongside the vertical axes of
slope-side among the landcover types. Results of this study indicated
that planted and mixed forests, aged between 30 and 50 years, decreased
SWC compared with natural forest or shrubland in semi- and arid regions.
We propose that the vegetation used in restoration projects needs to be
matched with the level of local mean annual precipitation.