Over nearly 50 years of publication, Terra et Aqua has benchmarked innovative maritime solutions through more than 150 issues. Articles are available here as well as in IADC’s Knowledge Centre.

Although modern dredging vessels have undergone great advances in horizontal and vertical dredging accuracy, many variables remain. These can result in the need for overdredging. If financial expectations about overdredging are not specified in the contract, conflicts may arise.
139
Published June 2015

Terra et Aqua 139 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
A long-reach excavator unloads sediments placing them over a vibrating sieve, after which the high-density material is pushed through a pipeline to the additive mixing unit. In this way, dredged material is reused and is engineered to build dykes.
138
Published March 2015

Terra et Aqua 138 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
A bucket dredger working in the Baltic Sea near Riga, Latvia. Both the Baltic Sea and the North Sea are SOx Emission Control Areas (SECAs). Dredging vessels in SECAs will have to comply with stricter fuel emissions standards as of January 1, 2015 (see page 14).
137
Published December 2014

Terra et Aqua 137 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
The CO2-related aspects of a dredging project are quite significant. The Sand Motor, shown here, was built on the Dutch coast and required extensive sand excavation which uses an enormous amount of energy. It is one of four projects being studied to develop a design tool aimed at calculating the CO2 footprint over the lifecycle of a project and do it from the start, in the design phase (see page 16).
136
Published September 2014

Terra et Aqua 136 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
(Cover) Building 41 km of causeways and 25 drilling islands at the Manifa Oil Field in Saudi Arabia required huge quantities of rock. Amongst other innovative techniques, hydraulically created sand bunds were finished by using extra-long reach excavators from the land side to install a slope protection of a rock underlayer installed on heavy duty geotextile.
135
Published June 2014

Terra et Aqua 135 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
Dredging at the Port of Lisbon. In order to obtain five-year environmental licences which would expedite the regular and systematic dredging of the beds of its access channels and manoeuvring and anchorage basins, the Port of Lisbon Authority developed new strategic plans for dredging and monitoring within the Tagus estuary (see page 5).
134
Published March 2014

Terra et Aqua 134 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
n Japan securing disposal fields to receive soft dredged material is a growing challenge. As a result, research for recycling soft dredged material to solidify it for construction purposes is highly advanced.
133
Published December 2013

Terra et Aqua 133 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
Aerial plan of the Brisbane Airport, where a New Parallel Runway is being built: This runway is a critical part of Brisbane Airport Corporation’s multi-billion dollar investment into capacity-building infrastructure. The challenges of this project were met with early contractor and stakeholder involvement to determine what was achievable within the confines of an operating airport (see page 13).
132
Published September 2013

Terra et Aqua 132 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
During construction of the Maasvlakte 2 block dam, laser scans and multibeam surveys were conducted to verify tolerance as the blocks were placed. As each 50-m section of the breakwater was ready, it was handed over to the client with a combined 3D model of the multibeam and laser scan data, such as the one pictured here (see page 18).
131
Published June 2013

Terra et Aqua 131 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.
A survey ship with a specially developed silt profiler – designed and constructed in 2009 and owned by the Port of Rotterdam – follows a trailing suction hopper dredger at work to measure active and surface plumes. This was an integral part of the extensive monitoring programme at the Maasvlakte 2 expansion project in Rotterdam (see page 20).
130
Published March 2013

Terra et Aqua 130 – complete issue

Read the complete issue containing articles, upcoming events, an interview and book review.