Focus: Construction Inspection

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in Hydro International magazine. By including a mix of older and more recent articles, we will present a complete recap of the subject. Furthermore, we will be bringing you a bi-weekly round-up of ‘Focus Stories’ related to the theme through our newsletter (sign up here). The theme for July 2016 is:

Construction Inspection

Hydrography serves constructions in various ways: when preparing the construction, during the construction and later, for maintenance. Offshore renewable energy gives a new dimension to this professional focus, as the selection proves.

Focus: Construction Inspection
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Managing UXO Risk in Offshore and Renewables Projects

With the increase of offshore marine projects over the decades, demand for a cost-effective and efficient risk-based approach for the mitigation of UXO (Unexploded Ordnance) has become a priority for... (read more)
Ing. Mattijs de Lange Bsc, Seaknowledge, The Netherlands

3D Precision Beyond the Horizon

The Gemini Offshore Wind Farm in the North Sea is located 85km north of Groningen, The Netherlands. Van Oord, a leading Dredging and Marine Contractor, started the offshore construction work in Januar... (read more)

Handling Sonar Data from AUV Operations

During the past few years, autonomous underwater vehicles (AUVs) have established a greater presence in the hydrographic survey market and in the collection of oceanographic environmental data. These... (read more)

Hydroelectric Power Plant Inspections

In Brazil there is a legal requirement to inspect all hydroelectric dams and power plants (HPP) every five to ten years, but the methods to be employed for such inspection are not well-defined. Most o... (read more)

New York Harbour

The greatest of the Coast Survey mid-nineteenth century harbour studies was that of New York Harbour. In 1855, the Commissioners on Harbor Encroachments of New York requested that new hydrographic sur... (read more)

Self-installing Wind Turbines

The Dutch company SPT developed a new foundation concept for offshore wind turbines in order to reduce the costs and environmental impact: a Self Installing Wind Turbine. The concept is based on a tri... (read more)
Thijs Visser Project engineer, SPT Offshore; Kees-Jan van der Made, Director, Wiertsema & Partners; Marco de Kleine Senior geologist, Deltares, the Netherlands

Developments in Highly Accurate Immersed Tunnel Positioning

Netherlands-based positioning specialist Geocon was awarded a contract for the immersion of one of the deepest and longest immersed tunnels in the world, in South Korea’s Jinhae Bay. Together wi... (read more)
Bart-Jan Ruesink, Geocon, The Netherlands

Marine Asset Integrity Mapping

Advances in marine & terrestrial scanning survey techniques together with precise inertial navigation sensors, multi-sensor acquisition systems and cost-effective UAS photogrammetry allow hydrogra... (read more)

Are the Bridge Piers Safe??

Bridges with bridgeheads and supports in water need regular inspection, especially the underwater parts, and even more so if they are exposed to current - as scour needs attention. The unexpected coll... (read more)
Dr. John J. Woo, DSME E&R Ltd (Republic of Korea)

Acoustically Aided INS (AAINS) and Laser / Lidar

Aerial mobile mapping using Lidar and GNSS aided inertial navigation has revolutionised the efficiency of land and shallow-water bathymetric surveying. Now, fast ultra-high resolution subsea mobile ma... (read more)

Hydro Dam Inspection by ROVs

The inspection and maintenance of vital resource facilities is an integral part of any regional health and stability management programme. Providing consistent quality output whilst reducing inspectio... (read more)
Rob Berlijn, HydroConsult, The Netherlands

Portland Harbour

A progressive spirit was awakening in the United States in the mid-nineteenth century. This movement was notable for emphasis on education reform, prison reform, women’s suffrage, the abolitioni... (read more)
contributing editor, Hydro International

Raw Data as Information Source

For hydro- and topographic surveying companies it is common to gather data in the field and process it into formats for presentation. Nowadays, technology  provides more and more solutions that e... (read more)

Building a Bathymetric Uncertainty Model for AUVs

Fleets of small AUVs are used to survey pipeline routes, rig scour and debris clearance, and for harbour development. While AUV bathymetry can be as good as or better than boat-mounted data, some of t... (read more)
iWBMS Sonar System

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