Normalized Difference Suspended Sediment Index (NDSSI)

The NDSSI equation is as follows

NDSSI = (blue - nir) / (blue + nir)

NDSSI range from -1 to +1 where higher values indicate the presence of more clear water and lower values indicate the presence of more turbid water or land.

Sources

Hossain, A. K. M. A., Y. Jia, and X. Chao. "Development of remote sensing based index for estimating/mapping suspended sediment concentration in river and lake environments." Proceedings of 8th international symposium on ECOHYDRAULICS (ISE 2010). Vol. 435. 2010.