In this study, two techniques for spatio-temporal (ST) kriging of soil water content are compared. The first technique, spatio-temporal ordinary kriging, is the simplest of the two, and uses only information about soil water content. The second technique, spatio-temporal kriging with external drift, uses also the relationship between soil water content and net-precipitation to aid the interpolation. It is shown that the behaviour of the soil water content predictions is physically more realistic when using spatio-temporal kriging with external drift. Also, the prediction uncertainties are slightly smaller. The data used in this study consist of Time Domain Reflectometry (TDR) measurements from a 30-day irrigation experiment on a 60 x 60-m grassland in the Netherlands. (C) 2002 Elsevier Science B.V. All rights reserved.
- soil water content
Snepvangers, J. J. J. C., Heuvelink, G. B. M., & Huisman, J. A. (2003). Soil water content interpolation using spatio-temporal kriging with external drift. Geoderma, 112, 253-271. https://doi.org/10.1016/S0016-7061(02)00310-5