MAMPEC

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

Demo / images

Support

You can download the MAMPEC installation files from the download portal. Use the “Goto Download portal” button in the left menu panel. Here you can also download the technical and other documentation.

New update version 3.1

A new update is available (September 2016) in the download section. The update includes bug-fixes for version v3.0.1 released in August 2014, updated hydrodynamics, new functionalities, and improved scenario management, based on feed-back and help-requests from users and developers. The changes have a limited effect on calculated concentrations in water, sediment, or suspended matter for some scenarios and compounds. New regional marina scenarios were added. More information is provided in the Release Notes and Manual of version 3.1.

For other questions please contact:

Email: mampec.support@deltares.nl

Telephone number: +31(0)88 – 335 8100

Frequently asked questions

How can I find the detailed version number of MAMPEC?

The main version number of a major upgrade of MAMPEC (e.g. v3.0 or v3.1) is indicated in the top window bar. The detailed version number (of intermediate updates and minor bug fix releases; e.g. v3.1.0.2) can be found as follows: locate the executable file (Mampec.exe) in the program directory and use the right click menu of the mouse to check the “Properties” menu entry of this file. Under the tab “Properties / Details” the detailed file version number is indicated. In future versions (v.3.1.0.3 and later) this can also be found under the “Help / About” screen and in the “Report” form (5th line from top, under “Version”). The detailed version number is important when reporting errors or problems to the Helpdesk.
Error message: ‘MAMPEC has stopped working’ immediately after starting MAMPEC
This error message is caused by a permission issue. Workarounds are:
- Installing a portable version of MAMPEC. Please run the portable from a directory in which you have sufficient permissions (write access) such as your desktop; or
- Right-click the MAMPEC shortcut on your desktop, select ‘Properties’, select the tab ‘Compatibility’, and enable ‘Run this program as an administrator’.
  Running as administrator may not be possible on your system, depending on restrictions set by your administrator.
Background information: MAMPEC requires write access to files in the MAMPEC installation directory. In Windows, certain programs are executed with limited permissions unless forced to run as administrator.
Error message: Attempt to write a read-only database (SQL) when using MAMPEC, for example when loading a scenario
This error message is caused by a permission issue. Workarounds are:
- Installing a portable version of MAMPEC. Please run the portable from a directory in which you have sufficient permissions (write access) such as your desktop; or
- Right-click the MAMPEC shortcut on your desktop, and select ‘ Run as Administrator’. This may not be possible on your system, depending on restrictions set by your administrator.
Background information: MAMPEC requires write access to files in the MAMPEC installation directory. Even when logged in as administrator, certain programs are executed with limited permissions unless forced to run as administrator.

Full error message: NHibernate.TransactionException: Begin failed with SQL exception —> System.Data.SQLite.SQLiteException: Attempt to write a read-only database.
Can I use a comma as decimal separator? What regional setting should I use?

Due to differences between countries in the usage of dots/commas as decimal separator the model has been adapted as far as possible to meet the different regional settings of users (to be found in: XP: WindowsSettingsControl PanelRegional settings; Win7: Control PanelClock, Language and RegionRegion and LanguageAdditional settings). Depending on the country, dots or comma’s can be used as decimal separator. The model was developed with the English (US) settings, as this is the standard in most of the scientific literature. Settings tested include French (standard), German (standard), and Dutch (standard). Due to bugs in the OS this may not function properly for all regional settings. Especially when the Regional Settings have been edited by local users, the program may not function properly. In case of problems we recommend to use the English (US) settings.

See also: How do I recognize problems with regional settings on my computer?
How do I recognize problems with regional settings on my computer?

Problems with regional settings can be detected by inspecting the proper representation of figures with commas and dots (e.g. in compound properties screen) or by examining the effect of variations before and after the decimal separator and resulting changes in related input boxes. Example: in the Compound input panel any change in one of the six (bio)degradation rate constant boxes (in day-1) should immediately result in the related calculated half-life (in day) boxes.

See also: Can I use a comma as decimal separator? What regional setting should I use?
I cannot enter properly numeric data in the compound-properties input screen of MAMPEC. What is wrong?

Most likely there is a problem with the Regional Settings on your computer and the setting for the decimal separator. This can easily be recognized (see: How do I recognize problems with regional settings on my computer?) and fixed (see: Can I use a comma as decimal separator? What regional setting should I use?
How can I download the MAMPEC software?

The MAMPEC model software is freely available from the download portal at the support website: https://download.deltares.nl/en/download/mampec/

The program can be installed in two different ways: 1) by using the installer version (MAMPEC AF installer.msi), which is the recommended option for users with full administrative rights, or 2) by using the portable version (MAMPEC AF portable.zip), which can be unzipped and used in any directory or drive, including USB-drive. The last option is recommended for users and situations with limited administrative rights, and is therefore used as the default version.

The user needs to provide name and email address, to which a message will be send with the download link for the version selected. The default download package for the current version includes the portable versions of MAMPEC AF and MAMPEC BW and related documentation such as the user manual, installation instructions, technical documentation and release notes.

For the other installation packages indicated on the download portal, the user needs to first select the required package and then fill in the subscription panel.
Why is my results table empty for a new run with the Open Sea or other scenarios?

The new model run seems to be executed regularly, but the results table is empty and no specific error messages popping up. This is probably related to the maximum dimensions of the Open Sea environment, which are limited and should not exceed 10 times the dimensions of the regular scenarios included (e.g. OECD-EU Shipping Lane). This may lead to problems with the DELWAQ software module in MAMPEC and result in blank lines in the results table in the Run model & View results screen. Proper warnings and error messages will be included in the next version.

If this occurs in model runs with the harbour or marina scenarios, a similar problem with deviating dimensions and the specification of the grid in the DELWAQ module may be the reason for this. Guidance for the dimensions of the commercial, estuarine or open harbour and marina is provided in the manual and handbook.
Is there a predefined open harbour scenario and how can I create one?

Currently no specific open harbour scenarios have been agreed upon in regulatory frameworks. New open harbour scenarios can be created from scratch in the Environment panel with the buttons New, followed by selecting the Open Harbour under Environment type and filling in all required input fields. A quick way to avoid providing multiple new input settings for water and sediment characteristics is to start (use Load button) with an existing marina or harbour scenario with similar characteristics, than change the Environment type to open harbour, change the Description field and store the new scenario with the Save as new button.
What are ug/L and ug/g dw in the results and reports panels

In the “Report” and “Export results” screens the µ (micro) sign is not properly represented. For the time being the u sign is used instead (ug/L for microgram per liter and ug/g dw for microgram per gram dry weight respectively).

Acknowledgements and References

The development of the model was sponsored by the Antifouling Working Group of the European Council of the Paint, Printing Ink and Artists’ Colours Industry (CEPE / CEFIC), with contributions of the European Commission – DG XI (1997-1999), Vrije Universiteit Amsterdam and Deltares (formerly Delft Hydraulics).

For the development of the ballast water version support was received from the International Maritime Organization (IMO) and the Ballast Water Working Group of the Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP-BWWG.

The first version of MAMPEC (v1.0), developed by Deltares (formerly Delft Hydraulics) and IVM Vrije Universiteit, was released in 1999, and sponsored by the Antifouling Working Group (AFWG) of the European Paint Makers Association (CEPE) as part of the project “Utilisation of more environmental friendly antifouling products”, sponsored by the European Commission (DG XI; Contract # 96/559/3040/ DEB/E2).

Between 2002 and 2008 further updates of the model (versions 1.4–2.5) were prepared for CEPE-AFWG for reasons of compatibility with upgrades of the Windows XP/VISTA/7 OS, inclusion of standard EU and OECD emission scenarios new functionalities ((advanced photolysis module, non-tidal hydrodynamic exchange, sediment processes, import/export functions), and languages (Japanese). The model is recognized and used by regulatory authorities in EU, USA and other OECD countries.

In version 3.0 (2011) the user interface and software has been upgraded to meet current standards ( .net framework) and several new functionalities (extended emission scenarios, multiple run options, analysis of chemical fate processes, new export options) and languages (Chinese) have been added.

References

User Manual MAMPEC v3.0 (FTP-site)
MAMPEC 3.0 HANDBOOK – Technical Documentation

Background and model formulations MAMPEC v1.4
Van Hattum B, Baart AC, Boon, JG (2002) Computer model to generate predicted environmental concentrations (PECs) for antifouling products in the marine environment – 2nd edn. accompanying the release of MAMPEC version 1.4, IVM Report (E-02/04), Institute for Environmental Studies, Vrije Universiteit, Amsterdam, Netherlands.

OECD-EU environmental emission scenarios for BPD
Van der Plassche E, Van der Aa E (2004) Harmonisation of environmental emission scenarios: an emission scenario document for antifouling products in OECD countries (ESD-PT21), Royal Haskoning, Nijmegen.

Emission scenarios and hydrodynamic background
Van Hattum, B., A. Baart, and J. Boon (2006). Emission estimation and chemical fate modeling of antifoulants. In: Konstantinou, I.K. (Ed.). Antifouling Paint Biocides. Handbook of Environmental Chemistry Vol. 5/O, Springer Verlag, Berlin (Germany), pp. 101-120.

Photolysis, exchange at low tidal conditions, new harbor scenario in MAMPEC v2.0
Boon, J, A. Markus, A. Baart (2007). Antifouling model to predict environmental concentrations (MAMPEC) – Technical background additional features of MAMPEC version. Delft Hydraulics / WL, Delft, Netherlands.

Application to regions with low tidal exchange
Baart AC (2003) MAMPEC, application at low exchange conditions. Report Z3662, WL| Delft Hydraulics, Delft.

Application of MAMPEC with TBT
Van Hattum, B. (2001). TBT – a compound currently in the lime light. In : J. Gandrass and W. Salomons
(Eds.). Dredged Material in the Port of Rotterdam – Interface between Rhine Catchment Area and
North Sea. GKSS Research Centre (Germany), p. 277-288.