| Study on spatial variability and patterns of soil salinity in the lli River Valley |
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| DOI：10.7606/j.issn.1000-7601.2011.02.26 |
| Key Words: geostatistics soil salinity spatial variability Kriging method the Ili River Valley |
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| Abstract: |
| The spatial variability of soil salinity in different soil layers，in the Ili River Valley as an example, was
quantificationally analyzed by means of GPS and GIS technology， based on the regionalized variable theory， using the semivariograms and the Kriging method of geostatistics. The results showed that the semivariograms of soil salinity in 0~20 cm，20~40 cm and 60~80 cm fitted the spherical model while the semivarioqrams of soil salinity in 40~60 cm fit-ted the Gause model. The autocorrelation range of soil salinity in different soil layers had apparent differences， and the autocorrelation renge of soil salinity increased from the top layer to the deeper ones. Analysis of the spatial patterns of soil salinity indicated that high values of soil salinity were mainly distributed on the lower-lying areas. On the vertical direction，the salinity of suface soil (0~20 cm) was the highest and it decreased gradually with the increase of soil depth. |