Delft3D 4 – Environmental modelling

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Environmental modelling is based on the transport of substances in surface and ground water using the so-called advection-diffusion equation. The water quality module Delft3D-WAQ of the Delft3D 4 Suite is based on this equation and it offers different computational methods to solve it numerically on an arbitrary irregular shaped grid, on a grid of rectangles, triangles or curvilinear computational elements. The sediment transport module Delft3D-SED can be applied to model the transport of cohesive and non-cohesive sediments, i.e. to study the spreading of dredged materials, to study sedimentation/erosion patterns and to carry out water quality and ecology studies where sediment is the dominant factor. It is in fact a sub-module of the water quality module. The ecology transport module Delft3D-ECO distributes the available resources (nutrients and light) in an optimal way among the different types of algae. It is in fact a sub-module of the water quality module. The particle tracking module Delft3D-PART is a three-dimensional mid-field water quality model. It estimates a dynamic concentration distribution by following the tracks of thousands of particles in time. Water quality processes are described by linear or non-linear functions of selected state variables and model parameters. Many process formulations are available in the form of a library, which smoothly interfaces with the water quality module. The library contains over 50 water quality process routines covering 140 standard substances.

Some areas of applications

  • Environmental Impact Assessment (EIA), objective evaluation of alternatives;
  • Sewage and/or storm water outfall studies;
  • Bio-availability of heavy metals (and organic micropollutants);
  • Recirculation of cooling water from power and desalination plants including the release of bio-fouling chemicals such as chlorine;
  • Effects of dredging on the environment;
  • Simulation of oil spills with floating and dispersed oil fractions.

Objective of the course

Setting up and running a water quality, an ecological, particle tracking as well as an oil disposal simulation.

Course subjects

  • Some basic theoretical concepts of environmental modelling;
  • Some numerical aspect to transport modelling;
  • Coupling hydrodynamic output to the environmental model input;
  • Selecting substances and processes with the Processes Library Configuration Tool;
  • Setting up and running a sediment, oxygen, nutrients and algae simulation;
  • Setting up and running a tracer simulation;
  • Setting up and running an oil disposal simulation.

This course is aimed at

  • Knowledge how to model the hydrodynamics;
  • Project engineers, project leaders and researchers.

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