Environmental Impact Assesment South Middle East Abu Dhabi Environmental Consultants WKC Group

Marine Modelling

WKC utilises specialist software to predict plume geometry and mixing behaviour from a diverse range of effluent discharge types including:

  • Industrial wastewater discharges containing conservative and non-conservative pollutants
  • Cooling water discharges with elevated temperatures
  • Desalination plant discharges with elevated brine concentrations
  • Dredge and drill cuttings (suspended sediments)

The modelling systems currently being used include CORMIX for near-field applications, and the GEMS suite of modelling applications for more complex or far-field situations.

The suite of 3-D GEMS modelling packages that WKC currently utilise are summarised as follows:

earth-11015GCOM3D is an advanced, z-coordinate three-dimensional, ocean-circulation model that determines horizontal and vertical hydrodynamic circulation due to wind stress, atmospheric pressure gradients, astronomical tides, quadratic bottom friction and ocean thermal structure. GCOM3D is used to generate ocean circulation data that can be used to drive a number of other modelling packages.
factory-1509853PLUME3D is the integrated, high resolution 3D plume dispersion model for modelling the behaviour of a wide variety of discharge materials including sediments, sewerage, thermal discharges, oils and chemicals. The oil spill prediction model, OILTRAK3D, is a sub-model of PLUME3D. PLUME3D obtains oceanic conditions from the GCOM3D model.
2016-09-06-11_00_47-marine-modelling-wkc-groupDREDGE3D is used for simulating the specific fate of particles discharged during dredging programmes. DREDGE3D inputs the physical environmental data from GCOM3D, together with wave and meteorological data, to simulate the movement and deposition of suspended particles in the water body across the study area.
sedSEDTRAK3D is a 3D Sediment Transport Model that simulates the movement of suspended particles under the influences of wave and currents. SEDTRAK3D can be used to simulate a wide number of sediment discharges such as dill cuttings and muds, atmospheric deposition, surface run-off, coastal suspended sediments, etc.
o01_23334333OILTRAK3D is designed to simulate the fate of various oil types when spilled into the marine environment. The model uses current predictions from GCOM3D to provide an accurate representation of a spill, taking into account numerous physical and chemical processes. Common sources of spills simulated in OILTRAK3D include pipeline rupture and vessel accidents.
These modelling systems can be used in a wide variety of applications including:

  • Optimising outfall design
  • Determining regulatory compliance with mixing zone radius limits
  • Providing input into marine ecology impact assessments
  • Oil spill assessments
  • Determining dilution factors for input into discharge hazard and risk assessments

Greg Ashcroft
Marine Modeller
+971 (0)2 644 5224