MAMPEC is a Marine antifoulant model to predict environmental concentrations. Originally developed to predict environmental concentrations (PECs) for the exposure assessment of antifoulants in harbours, rivers, estuaries and open water. MAMPEC is also being used for exposure assessment in freshwater systems and discharges of chemicals in ballast water. It is easy-to-use and freely available.

MAMPEC is an integrated 2D hydrodynamical and chemical fate model, based on the Delft3D-WAQ and Silthar model. The exposure assessment model is recognized and used by regulatory authorities and applicants in EU, USA and other OECD countries for antifouling substances, and by the IMO for ballast water discharges.

The model is being developed and maintained by Deltares and the Institute for Environmental Studies with continuing support of the European Paintmakers Association (CEPE).

Antifouling substances

New antifouling agents have replaced TBT-based products on large seagoing vessels since the final ratification and entry-in-force (2008) of the IMO treaty on new antifoulants of 2001. For the exposure assessment in marine environments there is a need for reliable chemical fate models. Existing models lacked a realistic treatment of the complex transport and exchange processes in coastal environments.

Ballast Water

In 2010 a special version for ballast water (MAMPEC-BW) was developed for the International Maritime Organization (IMO) and Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) for the exposure assessment of chemicals in ballast water.

MAMPEC Features

  • Integrated 2D hydrodynamical and chemical fate model based on DELWAQ and SILTAR of Deltares
  • Esimation of hydrodynamical exchange in six generalised ‘typical’ environments (open sea, shipping lane, estuary, commercial harbor, yachting marina, open harbour)
  • Compound properties/processes included in model: Kow, Kd, Koc, H, volatilization, speciation, hydrolysis, photolysis, bio-degradation. Chemical fate approach in line with EU-TGD
  • Emission estimation based on leaching rates, ship hull underwater surface areas, shipping intensities, residence times
  • Environmental / hydrodynamical parameters: currents, tides, salinity, density differences, DOC, POC, Chlorophyll, pH, T, SPM, sedimentation, latitude, port dimensions, submerged dams
  • Default settings for generic environments, emission scenarios, and compounds
  • Inclusion of standard EU (PT-21) and OECD emission scenarios for service-life and non-service life emissions
  • Model allows easy comparison of PECs of different compounds
  • Multiple run option allowing to run multiple scenario combinations and to facilitate sensitivity analysis
  • Analysis of main compound fluxes and significance and contribution of different chemical fate processes
  • Improved user interface with more intuitive lay out and workflow, database management, as well as handling of input and output screen
  • Version 3 based on .NET framework and C# and compatible to current and expected upgrades of the Windows XP/VISTA/7 OS
  • Validation: model predictions of TBT, Irgarol, diuron, Seanine and other compounds matched within order of magnitude with measured concentrations
  • Multi-lingual support: in addition to English and Japanese (since v2.5) new translations in v3.0 are: Chinese and Spanish
  • Copper speciation: option to export results and create an input file for the widely used Biotic Ligand Model (BLM), to facilitate further analysis of the copper speciation
  • Separate version for G-9 assessment of substances in ballast water
  • Freely available