High Resolution Remote Sensing Estimation of Salinity in Salt Lake with Uranium Resources

The uranium resources of salt lake is positively correlated to the salinity, and the salinity of salt lake is an important factor to evaluate whether it contains rich uranium resources. This paper takes the Gasikule salt lake with uranium resources in Qaidam as the study area, exploring the remote sensing estimation of salinity based on SPOT5 data with high resolution, in order to to identify the salinity fast and precisely. The spectrum of lake water with different salinity are acquired and the spectra feature is studied, and the multi-dimensional salinity indexes of SPOT5 data are constructed. What's more, the paper extracted the salinity information of salt lake by the method of ratio and principal components analysis (PCA), and discovered the high salinity circular abnormal phenomenon in the east of lake, and identified the location of salinity abnormal hiding in the salt lake. The results provide the important basis to identify the location of rich uranium resources in salt lake.