Study on Soil Moisture Inversion Method in Desert Oasis Regions Based on Multi-source Remote Sensing
Remote sensing inversion of soil moisture in arid and semi-arid areas is helpful to discover the law of drought occurrence.In this paper,Minqin desert oasis in Gansu province was selected as the study area,and GF-6 WFV data and CBERS-04 IRS data were selected as the remote sensing data sources.By spectral feature analysis,the applicability of perpendicular drought index,modified perpendicular drought index and temperature vegetation drought index in soil moisture inversion in arid and semi-arid areas were dis-cussed.The measured soil moisture at the same time in the following year was used to verify the inversion results.The results showed that the inversion results of temperature vegetation drought index were more in line with the law of land cover in the study area,and the inversion results of perpendicular drought index,modified perpendicular drought index cannot effectively reflect the difference of land surface humidity.The results could provide reference for monitoring soil moisture in arid desert oasis.
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