IMPROVEMENT EFFECT OF BIOLOGICAL ENVIRONMENT BY USING GRANULATED COAL ASH ON LOW NUTRIENTS TIDAL FLAT

Abstract

 Artificial tidal flats made of granulated coal ash(GCA) have been created in Hirosima coastal area and the effect of GCA on tidal flats environment has been evaluated. In previous research, we clarified the improvement of the sediment and biological environment in tidal flats with high organic mud deposits. In this study, we investigated the environmental improvement effect of bottom sediment in tidal flats where mud with low organic content accumulated, clarified the effect of increasing benthic organisms including clams, and the effect of improving the primary productivity of tidal flats (increase effect of microalgae). In addition, we compared the difference in living organisms depending on whether or not GCA on the tidal flats, and clarified that the GCA has the effect of constructing a various ecosystem.