Saline soil identification based on electromagnetic induction and remote sensing in Xinjiang Oasis

Taking into account the problem of soil salinization existing in arid region, this study was to discuss the feasibility of identifying saline soil using electromagnetic induction techniques and spectral angle mapper (SAM) in a typical arid region of Weigan-Kuqa River Oasis of Xin jiang Province. To severe saline soil, for example, using EM38 electromagnetic induction instrument and sampling data, combined with spectral angle mapper and regression analysis, get the spatial distribution of soil electrical conductivity (EC1:5) and identify severe saline soil. The result indicated that soil apparent electrical conductivity (ECa) has good non-linear correlation with Soil conductivity (EC1:5); the interpretation accuracy of the vertical mode conductivity (EMv) to soil electrical conductivity (EC1:5) is better than the horizontal mode conductivity to; soil salt content showed moderate variation; the electromagnetic induction techniques and spectral angle mapper can identify eligible saline soil better together. This research method can identify the saline soil better in typical arid areas, and provide a new way for salinization assessment in different scales.