Readers can look forward to some exciting news from the International Association of Dredging Companies (IADC) in the coming months. The Association will be publishing its “Ecosystem Services: Towards integrated marine infrastructure project optimisation” report. The report discusses in detail the concept of ecosystem services (ES) and how it can be utilised to enable efficient implementation and realisation of sustainable dredging and marine infrastructure works in environmentally sensitive areas. The paper will be available online on IADC’s website towards the end of September after the Association’s Annual General Meeting (AGM) in Cascais, Portugal.

IADC has entered as a nominee for its ES project for the inaugural IHS DPC Innovation Awards 2016 under the “Innovative services to dredging” category. Currently, IADC has been shortlisted for the award in the category. The winners will be announced at an awards ceremony, which will take place in London in early November.

Since, we are still on the topic of sustainable dredging, the first article in this Terra et Aqua addresses the same issue. The article, “Building with Nature: Sustainable protection of mangrove coasts” delves into the philosophy behind Building with Nature (BwN) and how this approach combines natural processes with innovative engineering methods for sustainable projects.
The feature also highlights a case study: a current BwN project in the Demak district in central Java, Indonesia, where permeable dams are being built. It is a relatively low-tech and low-cost approach to help restore eroding mangrove-mud coasts that will ultimately improve the central coastline of Java.

Safety is another essential topic in the dredging industry. To promote the importance of safety IADC established the IADC Safety Award. The Association received eight nominations for the Safety Award and currently, one nominee is being announced each week. The nominees’ innovative products or services to improve safety in dredging is promoted through IADC’s website and other social media platforms. The winner of the award will be presented at the IADC AGM in September.

IADC is also very much involved in promoting the dredging industry to young engineers and students. Thus, the IADC Young Author Award was started to help stimulate new ideas and to encourage young people working in dredging and related fields. Winners of the award receive a € 1,000 prize and their papers are published in Terra et Aqua. François De Keuleneer won the Young Author Award at the WODCON XXI in Miami, Florida in June this year. His paper, “LuXeal – The easy to handle watertight mixture” is featured as the second article in this edition.
It discusses a new and innovative watertight bentonite mixture, LuXeal, and the use of it as a watertight layer in dredging works in Juliana Canal in the Netherlands.

The last article, “Dredging sound levels, numerical modelling and EIA” gives an overview of known sound source levels for various dredging equipment and activities and describes a method used to extrapolate source levels based on the pump power when a source level has not been directly measured. In addition, the article explains how the information can be used to predict the propagation of sound from dredging activities using numerical modelling tools for Environmental Impact Assessment (EIA) purposes.

Peter de Ridder
President, IADC