Dumping Dredged Material with Double-Tremie

Double-tremie work was applied to mitigate some effects caused by dumping dredged materials. Field investigations were carried out in order to clarify its efficiency, which can reduce the discharge of suspended solids by circulating water body in it. It is found that natural circulation did not occur under an intermittent dumping condition, but an additional compulsory circulation by aeration could keep suspended solids in the tremie at a higher level and reduce the discharge to the surrounding water.