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The Kriging method based on the theory of regionalized variables is applied to the interpolation of transmissivity field at Aquifer. Compare to other interpolation schemes , the advantage of Kriging method is that it provides not only the "BLUE" ( abbreviation of Best Linear Unbiased Estimator ) estimated value but also the estimation variance ( Kriging variance ). For the purpose of Kriging,30 transmissivity values obta- ined from pumping test to be applied in this study. Stochastic analysis shows transmissivity values follow a log-normal distribution. To get a much better spatial structure, logarith- mic transformation is made for structure analysis. Mapping results also show the estimated values in boundary regions have higher variance, and thus, contain more uncertai- nty, which implies that higher priorities must be assigned to these areas when locate new pumping well.
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