EIH Estudio de Ingeniería Hidráulica S.A. has developed and applied to several different uses a model for the advection and dispersion of substances dissolved in water. The model called EIH AD-32 is programmed to run under Windows, and it solves using finite differences with a third order algorithm the advection and dispersion equation.

The hydrodynamic data necessary for this model can be obtained from any kind of two dimensional hydrodynamic model, (for instance EIH’s HIDRO2). The most important characteristic of the EIH AD-32 is that thanks to its modular structure it can simulate different types of substances, ranging from conservative (those who don’t suffer from decay) to complex interactive ones that require coupled modelling such as dissolved oxygen and Ammonium.

These are its characteristics:

• Programmed in a 32 bit Windows environment, this allows several models to be running at the same time.
• Easy and friendly operation
• Can consider unlimited constant and variable sources
• Numerous decay routines to simulate several substances independently or coupled
• Thanks to EIH’s constant service policy the AD-32 can be adapted to specific user’s needs

The AD-32 can be applied to

• It is ideal for shallow lakes, rivers, estuaries and groundwater
• Problems with the location of water intakes and sewage discharges
• The detection of clandestine or unknown discharges
• Eutroficaton control
• Real time water quality alert (using real time data from a measurement network)
• Contamination control
• Location of water wells, waste deposits, and landfills