The normalized peak area (NPA) of remote-sensing reflectance (R rs) in the near-infrared region was used to estimate the concentration of total suspended matter (C TSM) in coastal waters. A linear regression model between C TSM and S NPA (R 2 = 0.83) was established, where S NPA is the area encompassed by the reflectance curve and the straight line between wavelengths 768 and 840 nm where there is a maximum of R rs near 715 nm. In the Pearl River estuary of South China, this NPA model performed better than other single-band and multi-band regression models, with a root mean square error (RMSE) of 4.07 mg l–1. This model may be widely applied to in situ measurements of TSM.
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Ma et al. (2011) studied this question.