Marine Hydrodynamic Modelling

Saudi Environmental Studies provides marine hydrodynamic modelling coordination in Saudi Arabia for ports, outfalls, dredging, reclamation and coastal developments. Marine hydrodynamic modelling provides the physical circulation foundation for many coastal studies, examining tides, currents, water levels and transport; we coordinate it through marine-modelling partners and appropriately licensed environmental consultants for formal assessments.

You receive a written proposal setting out the modelling scope, data required, deliverables, timeline and price. Request a quotation

We scope, coordinate and manage the work. Your proposal identifies the responsible partner, software, version, model setup and validation approach. A model supports decisions, and the authority decides on approval.

Define the coastal decision

The model scope may support an EIA, outfall design, harbour works, dredging-plume study, sediment assessment, cooling-water assessment or oil-spill planning. The first task is to define the process of concern, study area, seasons, project alternatives and receptors. A circulation model built for regional water levels may need refinement before it can answer a near-field outfall question.

For a formal environmental impact assessment or ESIA, the licensed lead consultant confirms current NCEC, Royal Commission or other applicable requirements. Coastal sites at Jeddah, Jubail, Yanbu or elsewhere differ in bathymetry, tides, winds and habitats, so site data drives each model.

Marine hydrodynamic modelling inputs

Inputs may include bathymetry, coastline, tides, winds, atmospheric pressure, temperature, salinity, river or discharge flows and open-boundary conditions. The partner documents the date, resolution, datum, source and quality of each dataset. Survey data and design drawings receive coordinate and vertical-datum checks before use.

NOAA’s official tides and currents programme illustrates the importance of observed water levels and currents, while specialist platforms such as the Deltares Delft3D Flexible Mesh suite demonstrate that coastal models are configurable systems rather than push-button calculations. Neither source determines the model that a Saudi authority will accept, so the partner justifies the chosen tool and version.

Design the domain and scenarios

The model domain is large enough to represent boundary forcing and detailed enough around the project area. Grid or mesh resolution, vertical layers, time step, roughness and turbulence treatment affect results. The modeller records these settings and tests numerical stability and mass conservation as appropriate.

Scenarios may cover representative seasons, spring and neap tides, winds, existing and proposed layouts, construction stages or operational flows. Extreme conditions are included only where required and supported, and any “worst case” is explained by its physical basis.

Calibrate, validate and disclose uncertainty

Where suitable observations exist, water levels and currents are compared with model results across relevant locations and periods. Calibration adjusts justified parameters; validation tests performance against separate data where practicable. The report records statistical and graphical comparisons, data limitations and areas of lower confidence.

Uncertainty can arise from bathymetry, boundary data, winds, stratification, discharge assumptions and model resolution. Sensitivity testing helps show which assumptions materially affect the decision. The modeller determines appropriate checks for the method and scope.

Connect circulation to specialist studies

Hydrodynamic outputs may drive desalination brine and outfall dispersion modelling, wastewater mixing-zone assessment or oil-spill trajectory and sensitivity studies. Each adds substance-specific inputs, criteria and uncertainty; ecological significance and permit compliance are assessed in those studies.

The deliverable typically includes the conceptual model, datasets, datums, domain, mesh, boundary conditions, software/version, calibration and validation, scenarios, results, sensitivity, limitations and reproducible files where agreed. GIS and environmental-constraints mapping helps align habitats, intakes, outfalls and project assets.

Coordinate surveys and model milestones

A staged programme reduces rework:

1. The marine partner issues a data-gap note before surveys.
2. A methodology memorandum follows before the full domain is built.
3. Interim reviews check bathymetry, boundaries, calibration and the scenario matrix.
4. Ecology, outfall and port designers confirm that the outputs match their required locations and time periods.

Changes to coastlines, dredge levels or structures are versioned because even a small design revision can alter local circulation and invalidate an earlier scenario.