TOPOGRAPHICAL CHANGES AND HABITATS IN ＡRTIFICIAL TIDAL FLATS AND SHOALS CONSTRUCTED GRADUALLY BY USING DREDGED MUD

Abstract

 In the tidal flats and the shoals which constructed gradually by using the dredged mud for 8 years, the features of the topographical change under and after construction and the habitat conditions of the organisms such as the short-neck clams were grasped from the existing data and the field survey. According to the result of evaluation of the topographical changes at the construction, some dredged mud moved and discharged before the sand capping. However, after the sand capping, the tidal flats were nearly stable and the habitat of the organisms such as the short-neck clams was maintained. Also, in the shoal construction zone, the eelgrass bed got the early recovery.