Accession Number : ADP002405

Title :   Test Dredging of Bottom Sediments in Osaka Bay,

Corporate Author : JAPAN DREDGING AND RECLAMATION ENGINEERING ASSOCIATION TOKYO

Personal Author(s) : Koba,H.

Report Date : 1983

Pagination or Media Count : 27

Abstract : Test dredging was carried out with cutterless dredges in Osaka Bay where bottom sediments contain severe organic contamination. The Oozer pump dredge was also studied in this test work. The following results were obtained: The sludges may be efficiently dredged with the suction mouth of the dredge swinging back and forth along the seabed; By setting the swing speed for dredging from 6 to 7 m/min. or less, little contamination in the vicinity of the suction mouth occurs; The efficiency of the dredge is approximately 250 wm/hr on the average, with a concentration of 30 to 40 percent by volume; The sludge dredged may be efficiently disposed of by transporting it on a barge to the disposal site; and The advantage of the Oozer pump dredge lies in that little excess water is sucked in while dredging which facilitates disposal of the slurry.

Descriptors :   *Environmental management, *Dredging, *Ocean bottom, *Waste disposal, Water pollution abatement, Dredged materials, Sludge, Contaminants, Removal, Coastal regions, Japan

Distribution Statement : APPROVED FOR PUBLIC RELEASE