Carbon emission of dredged marine sediment

There are 4-6Mt carbon emission resulting from 2,000,000,000 m3 marine sediment. The dredging sediment was removed annually from the waterways around the world. Few efforts have been applied to the evaluation of carbon emission from comparable types of dredger. The carbon emission of four kinds of dredgers which dredged marine sediment was estimated in this paper. Two kinds of representative dredgers have been introduced. They are the Training Hydraulic Grab Hopper Dredger and the Sea Going Hopper Suction Dredger. The Dustpan Dredger and the Bucket Wheel Dredger´s results also be presentd in the paper.In order to estimate carbon emission clearly, the estimation was divided into 10 portions based on the commonly operation workstage. In the specific dredging situation of the paper, the result shows that the Trailing Hydraulic Grab Hopper Dredger is better suited for 10nm transport distance and has lower carbon emission generated from dredging 1m³ marine sediment. The result indicates that carbon emission evaluation is not only contribute to control greenhouse effect, but also promote the industry of dredging to strengthen the concept of Low Carbon Development.