Abstract
Suspended Solids (SS) in brackish lakes are mainly originated from planktons, terrestrial organic matter, and bottom sediments. Total Organic Carbon (TOC) content and mass ratio of TOC to total nitrogen (C/N) in the SS from each origin is known to be different from others. Multi-wavelength remote sensing of these quantities is studied using a set of spectroradiometer data. The ISE-PLS method is applied to avoid multicollinearity in multiple regression method and to improve the accuracy in the estimation of TOC content and C/N. TOC content and C/N is found to be well estimated by the ISE-PLS method. Moreover, a case analysis using LANDSAT-5 TM observation data shows reasonable TOC content and C/N maps in Lake Shinji, a brackish lake in Shimane Prefecture, Japan.
