EMIS: Environmental Management Information System

Simulation models: coastal water quality

EMIS maintains a range of dynamic simulation models that can be used both for automatic, scheduled forecasting and now-casting runs (modeling cum monitoring, data assimilation) but also interactively for scenario analysis, planning, and environmental impact assessment.

Coastal water quality

For industrial parks in coastal locations including major harbors and related activities, coastal water quality for harbor basins and the coastal waters is available, based on the ROMS/TOMS (or POM) 3D dynamic flow and transport model system.

With a very high vertical resolution in the cm range and corresponding computational time steps of seconds, the system can also handle double diffusive problems such as (warm) brine dispersion. The scenario uses "analytical" tides with the correct amplitude, meteorological boundary condition that affect the evaporation in the harbors basin and thus induce some net inflow into the harbor basin that is an important element in controlling the salinity together with the tidal flushing.

Typical application examples for the 3D coastal water flow and quality model include harbor basin or sheltered, semi-enclosed bays where pollutant loads can accumulate, but also the near-field and more regional impacts of pollution sources, from waste-water treatment plant outfalls, to canals or rivers, or diffuse terrestrial runoff.

Another important application domain is the tracking and forecasting of oil spills from ships, offshore installation, or terrestrial installation and sources. Combined with the meteorological forecasting of up to a 10 days, this provides a powerful tool to marine support spill management and coastal protection.

Another important application is sediment transport, beach erosion. The high vertical resolution of a fully transient 3D model together with detailed distributed meteorological data fields (primarily dynamic wind fields for the estimation of wave action and impacts) generates realistic vertical flow profiles and bottom shear that is the basis for realistic sediment modeling, beach erosion and accretion.

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