Articles in this issue

An Analytical Approach to the Sedimentation Process in Trailing Suction Hopper Dredgers
An Analytical Approach to the Sedimentation Process in Trailing Suction Hopper Dredgers
Authors: Sape Miedema

A number of theories are used (Camp, Groot, Miedema and Vlasblom, Yagi, Braaksma, Ooijens and van Rhee) to determine the overflow losses when loading trailing suction hopper dredgers. The model derived here has several important improvements, including the speed of doing the calculations.

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Re-Use of Borrow Pits: The Dutch Approach to Storing (Contaminated) Dredged Material
Re-Use of Borrow Pits: The Dutch Approach to Storing (Contaminated) Dredged Material

As a result of complex legislation, lack of space and public resistance, cost effective solutions for dredged material, are becoming more and more difficult to find. Re-use of former borrow pits is an attractive option, particularly when it offers opportunities for environmental enhancement.

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Personal Protective Equipment (PPE) is an integral part of ensuring worker safety on dredging projects and helps in reducing workplace injuries and hazards. Shown here in Australia on a cutter, all crew are wearing face shields, safety glasses and shoes, hard hats and high visibility uniforms.
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Published September 2008