Table of Contents
International Journal of Oceanography
Volume 2016 (2016), Article ID 8097861, 10 pages
http://dx.doi.org/10.1155/2016/8097861
Research Article

Simulation of Sediment Discharges during an Outfall Dredging Operation

1Department of Mathematics and Statistics, Sultan Qaboos University, P.O. Box 36, Al-Khod, 123 Muscat, Oman
2Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khod, 123 Muscat, Oman
3State Key Laboratory of Water Environment Simulation & School of Environment, Beijing Normal University, Beijing 100875, China

Received 31 October 2015; Accepted 31 December 2015

Academic Editor: Heinrich Hühnerfuss

Copyright © 2016 Anton Purnama et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

CORMIX-GTS simulations are carried out to study suspended muddy sediment plumes following the discharge of the spoils taken from the seabed during a marine outfall pipeline dredging operation. Single port discharges are considered at three different locations at 400 m, 800 m, and 1200 m from the shoreline with water depths ranging from 3.5 m to 10.5 m. For discharges in the shallow near-shore region at 400 m offshore, most of the dredge materials are deposited at the seabed and the simulated suspended sediment plumes are found to be carrying a concentration of less than 1 kg/m3 of mainly fine silt and clay. For discharges in the deeper far-shore region at 1200 m offshore, the sediment plumes are more elongated and carrying a concentration of more than 3 kg/m3. Iterative simulations are also conducted to analyse the inherent uncertainty in the input data by varying the ambient velocity and the port’s horizontal angle of discharge.