Retrieve of Spatial and Temporal Distribution of Suspended Sediment in Bohai Bay Based on GF-1 Remote Sensing Satellite

Abstract

Abstract: Suspended sediment is one of the important parameters to evaluate the quality of Case II Waters. As the suspended sediment
in coastal waters has a certain adsorption effect on heavy metals and nutrients, its distribution characteristics can
reflect transferring and circling of pollutants to some extent. Therefore, the study of suspended sediment is of great
significance to the construction and environmental protection of Bohai Bay, China. In order to explore the variations of
sediment index and distribution of suspended sediment in Bohai Bay, the suspended sediment index of the Bohai Bay is
retrieved by band combination from the multi-spectral satellite image of GF-1, and the suspended sediment indexes of
the nine months in 2019 are obtained. It is found that the suspended sediment in Bohai Bay is greatly influenced
by monsoon in winter, and in spring and summer, the suspended sediment of high concentration shrinks towards
nearshore. Besides, the distribution pattern of suspended sediment in fall has a trend of transition to that of
winter. The study provides an important scientific basis and reference for the ecological environment protection
and industrial development in Bohai Bay.

Key words: Bohai Bay, suspended sediment, sediment index, band combination, temporal and spatial contribution

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