Appendix 1 – General Information on MAMPEC
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Marine Environment Protection Committee - MEPC.1/Circular.899 – 2022 Guidelines for Risk and Impact Assessments of the Discharge Water from Exhaust Gas Cleaning Systems – (10 June 2022) - Appendix 1 – General Information on MAMPEC

Appendix 1 – General Information on MAMPEC

 1 MAMPEC was originally developed to calculate Predicted Environmental Concentrations (PECs) for the exposure assessment of antifoulants (i.e. marine paints on the hull below waterline of ships) leached out in harbours, rivers, estuaries and open water. MAMPEC is a steady-state, 2D-integrated hydrodynamic and chemical fate model.

2 The MAMPEC-BW model was adapted for exposure assessment of chemicals discharged by the use of ballast water treatment systems and has the extended features from the original MAMPEC. On the request of the GESAMP-BWWG and IMO, a special standardised version of MAMPEC-BW for ballast water was developed in 2011, with a dedicated environment, a compound and an emission scenario for the use of BWMS.

3 The MAMPEC calculation for Ballast Water (MAMPEC-BW 3.1) model or the latest available version can be downloaded from the website of Deltares in the Netherlands. The website is as provided below:

  • https://download.deltares.nl/en/download/mampec/

4 The model and supporting documents have been distributed freely via the internet (https://www.deltares.nl/en/software/mampec/). The model predicts concentrations of targeted chemical substances in generalised "typical" marine environment (e.g. open sea, shipping lane, estuary, commercial harbour, yachting marina and open harbour). For ballast water, a representative harbour model has been defined. Users can specify emission factors (e.g. daily loads), compound-related properties and processes (e.g. Kd, Kow, Koc, volatilisation, speciation, hydrolysis, photolysis, biodegradation) and properties and hydrodynamics related to the specific environment (e.g. currents, tides, salinity, DOC, suspended matter load, port dimensions). MAMPEC includes options for advanced photolysis modelling, incorporation of wind-driven hydrodynamic exchange and other non-tidal exchange processes important for areas without tidal action or inland freshwater environments. MAMPEC can calculate concentrations of targeted chemical substances for individual grids specified by users.

5 In MAMPEC calculation, the total calculation will be located automatically depending on the feature of sea-area.

Parent topic: MEPC.1/Circular.899 – 2022 Guidelines for Risk and Impact Assessments of the Discharge Water from Exhaust Gas Cleaning Systems – (10 June 2022)
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.