International Association of Dredging Companies (IADC) has just released the latest issue of Terra et Aqua, their official quarterly publication.
The magazine is supported solely by the IADC as a service to the world-wide dredging community and represents IADC’s commitment to the highest standards of professional conduct.
IADC is the global umbrella organisation for contractors in the private dredging industry. As such IADC is dedicated to not only promoting the skills, integrity and reliability of its members, but also the dredging industry in general. IADC has over one hundred main and associated members. Together they represent the forefront of the dredging industry.
Articles in this Terra et Aqua:
– A COMMON SENSE APPROACH FOR H2S RELEASE DURING DREDGING
Christophe Leroy, Steven Huleu
The release of H2S (Hydrogen Sulphide) is a known risk in the dredging industry. It is a highly toxic and flammable gas (flammable range: 4.3-46%). Being heavier than air, it tends to accumulate at the bottom of poorly ventilated spaces.
In addition, it is very pungent at first, but quickly deadens the sense of smell, so that it may easily go unnoticed and victims may be unaware of its presence until it is too late.
– SEDIMENT TRANSPORT AND SEDIMENT MANAGEMENT IN THE ELBE ESTUARY, GERMANY
The tidal Elbe estuary in northern Germany serves as an example to show the kind of data, modelling and analysis tools that are required for a qualitative and quantitative description of sediment transport in an estuary.
These methods can be used to investigate sediment management options.
– CONTRACTOR OR CLIENT: WHO PAYS FOR OVERDREDGING?
Despite significant improvements in the past thirty years in precision of the dredging process and accuracy of hydrographic survey information overdredging is still an inherent part of dredging.
Both port developers and contractors alike have to deal with the allowance for dredging beyond the Client’s design dredge depth. The two issues of dredging to design only and the operational capabilities of the dredge equipment and (unavoidable) overdredging need to be considered.