How geostatistics can help you

Soil Use and Management - Tập 7 Số 4 - Trang 206-217 - 1991
Margaret A. Oliver1, R. Webster2
1School of Geography, The University, Edgbaston, Birmingham B15 2TT, UK.
2INRA Science du Sol, Place Pierre Viala, 34060 Montpellier Cedex, France. Present address: Rothamsted Experimental Station, Harpenden, Herts AL5 2JQ, UK.

Tóm tắt

Abstract. Geostatistics is basically a technology for estimating the local values of properties that vary in space from sample data. Research and development in the last 15 years has shown it to be eminently suited for soil and ripe for application in soil survey and land management. The basic technique, ordinary kriging, provides unbiased estimates with minimum and known variance. Data for related variables can be incorporated to improve estimates using cokriging. By more elaborate analysis using disjunctive kriging the probabilities of deficiency and excess can be estimated to aid decision.

The variogram is crucial in all geostatistics; it must be estimated reliably from sufficient data at a sensible scale and modelled properly. Once obtained it can be used not only in the estimation itself but also to choose additional sampling sites, improve a monitoring network or design an optimal sampling scheme for a survey. It may also be used to control a multivariate classification so that the resulting classes are not too fragmented spatially to manage.

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Soil Use and Management

Tập 7 Số 4

206-217

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