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Detection of soil salinity changes and mapping land cover types based upon remotely sensed data

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Abstract

Soil salinity is a major environmental hazard. The global extent of primary and secondary salt affected soils is about 955 and 77 M ha, respectively. Soil salinity tends to increase in spite of considerable effort dedicated to land reclamation. This requires careful monitoring of the soil salinity status. The objectives of this study were: (a) to evaluate the capability of thematic mapper (TM) and multispectral scanner (MSS) imagery for mapping land cover types, (b) to analyse the spectral features of sail crusts relative to bare soil and gravely soil surface conditions, and (c) to detect the soil salinity changes during the period 1975–2004 in the Ardakan area located in the central Iranian Deserts. The Landsat MSS and TM on two different dates of September 14, 1975 and September 11, 2004, respectively, were used. Due to great confusion between some classes, the TM 6 was included in the band combination. The result of the image classification based on the combination of TM bands 3, 4, 5, and 6 showed of the classification results. For multi-temporal analysis, both TM and MSS images were classified with the same method but with a different number of training classes. The TM-classified image was regrouped to make it comparable with MSS regrouped classified image. The comparison between the classified images showed about 39% of the total area had changed in 29 years. The result of this study revealed the possibility of detecting important soil salinity changes by using Landsat satellite data

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Correspondence to Hamid Reza Matinfar.

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Matinfar, H.R., Alavi Panah, S.K., Zand, F. et al. Detection of soil salinity changes and mapping land cover types based upon remotely sensed data. Arab J Geosci 6, 913–919 (2013). https://doi.org/10.1007/s12517-011-0384-6

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  • DOI: https://doi.org/10.1007/s12517-011-0384-6

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