Spatial and temporal distributions of suspended sediment concentrations are greatly important for analyzing the deposition and erosion variety of the estuary and coast

evaluating the material fluxes from river to sea

and studying oceanic sediment velocity and environment.The spectrometry imagery technology includes three kinds of spatial

radiation and spectral information.The Chinese Moderate Resolution Imaging Spectroradiometer（CMODIS） with 34 bands was loaded on the China’s SZ-3 spacecraft on March 25

2002.Making use of the CMODIS data

this paper presents the retrievals of the suspended sediment concentrations and its spatial and temporal distributions in the Yangtze River estuary with the field measurements.