Spatial Variability of Soil Salinity for Tidal Flat by Geostatistics and 3S Technology

Agriculture in tidal flat develops slow very much. One of the important reason is that the soil salinity is very higher. The region which covered typical salt marsh vegetation was chosen as subject investigated. The spatial variability of soil salinity by using geostatistics, RS, GPS, and GIS technology was analyzed. The research result was indicated that there was not distinguished data among all the soil salinity, the data which was converted to logarithm format would follow normal distribution. Therefore, stable variation function was got by ordinary Kriging interpolation method. The soil salinity was mainly subject to structural factors and had very strong spatial autocorrelation. It decreased gradually from north to south.