Soil Surface Salinity Prediction Using ASTER Data: Comparing Statistical and Geostatistical Models

    Tajgardan, T and Ayoubi, S and Shataee, S and Sahrawat, K L (2010) Soil Surface Salinity Prediction Using ASTER Data: Comparing Statistical and Geostatistical Models. Australian Journal of Basic and Applied Sciences, 4 (3). pp. 457-467. ISSN 1991-8178

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    Abstract

    This study was conducted to evaluate the performance of univariate spatial (ordinary kriging- OK), hybrid/multivariate geostatistical methods (regression-kriging- RK, Co-kriging- CK) with multivariate linear regression (MLR) in incorporation with ASTER data in order to predict the spatial variability of surface soil salinity in an arid area in northern Iran. The primary attributes were obtained from grid soil sampling with nested-systematic pattern of 169 samples and the secondary information extracted from spectral data of ASTER satellite images. The principal component analysis, NDVI and some suitable ratioing bands were applied to generate new arithmetic bands. According to validation based RMSE and ME calculated by a validation data set, the predictions for soil salinity were found to be the best and varied in the following order: RK ASTERmultivariate > REG ASTERmultivariate > Co-kriging ASTER> kriging. Overall, this comparative study demonstrated that RK approach was a better predicator than other selected methods to predict spatial variability of soil salinity. The overall results confirmed that using ancillary variables such as remotely sensed data, the accuracy of spatial prediction can further improved.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Aster, electrical conductivity, geostatistics, spatial prediction
    Subjects: Others > Soil Science
    Others > Agriculture-Farming, Production, Technology, Economics
    Depositing User: Ms. Ishrath Durafsha
    Date Deposited: 20 Nov 2014 05:19
    Last Modified: 20 Nov 2014 05:19
    URI: http://oar.icrisat.org/id/eprint/8342
    Official URL: http://www.insipub.com/ajbas/2010/457-467.pdf
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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