Colour terrain model of the EM3000 multibeam data overlain on an aerial photograph for Port Taranaki. This shows the level of detail now available for port engineering projects.
NIWA’s recent survey for Westgate Transport, which runs Port Taranaki, demonstrates the remarkable detail of our EM3000 multibeam mapping.
The survey, commissioned by Duffill Watts & King, aimed to establish a clear picture of the nature of the seabed before deepening of the harbour. In a single day, we surveyed both the proposed dredge areas alongside the wharves, and the spoil disposal site outside the harbour. The EM3000 system provides unsurpassed detail, with over 2.3 million individual seafloor data points acquired in less than 4 hours inside the harbour. This density of data not only shows clearly the new and previous areas of dredging, but also the type of seafloor material and the size and distribution of large boulders which will require blasting. Such data can provide invaluable information for project planning and underpin a more efficient dredging programme.