| Summary: | 碩士 === 國立臺灣大學 === 農業工程學系 === 84 === The purpose of this research is trying to find out the soil
contaminated sites in Taiwan. First, the surveyed data of 1600
ha-grid and the tentative threshold of the monitoring and
control values which EPA suggests are compared. Second, the
Kriging me- thod of geostaistics is used to find out the best
semivariogram and concentration contour in each county.
Finally, the contami- nated sites are identified. The results
shows that up to 13 counties among the 15 coun- ties have the
value exceeding the monitoring threshold and need to be
identified. Various semivariogram models are used in this
research to fitted Experimental semivariogram. Spherical model
analysis is used on the evaluation of Taipei and Nanto
counties. The Gaussian model is adapted to analysis the other
11 counties. Upon using the nature-log transformation, only the
value of Taipei county show the obvious progress in the
semivariogram analysis. Furthermore, the Zn contaminated in the
soil of Chang- hwa county is measured to find out if different
methods will have influence on the estimated value. The
conclusion is the estimated value gained from Spherical model
and Gaussian model is closer. However, the estimated value
gained from Spherical model is less similar to the value from
Gaussian model. The identification result is made into the
graph and enclosed in Appendix as reference.
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