1 / 7

Contents: Dynamic modelling Critical loads for heavy metals

ICP M&M Coordination Center for Effects Progress of work under the medium term WGE work plan for the ICP M&M, 2002-2005 Jean-Paul Hettelingh, TFIAM, 7-9 May 2003, Haarlem, The Netherlands. Contents: Dynamic modelling Critical loads for heavy metals. Dynamic modelling.

sheera
Télécharger la présentation

Contents: Dynamic modelling Critical loads for heavy metals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ICP M&MCoordination Center for EffectsProgress of workunder the medium term WGE work plan for the ICP M&M, 2002-2005Jean-Paul Hettelingh, TFIAM, 7-9 May 2003, Haarlem, The Netherlands. Contents: Dynamic modelling Critical loads for heavy metals

  2. Dynamic modelling • Production of Dynamic Modelling Manual (CCE rep.) • 2002 Call for CLO + DynMod data Objective: • Familiarize NFCs with increasing complexity • Encourage consistency between critical loads and dynamic modelling input parameters in the extended European database Preliminary results (as of Yesterday) • 18 countries submitted CLO data (out of 24 NFCs) • 9 of which included Dynamic Modelling data • Others need more preparation aiming for 2003 call

  3. Dynamic Modelling - near future • ICP M&M meetings 19-23 May 2003, Estonia includes NFC training for 2003 call • 2003 Call for CLO + DynMod data (Oct/Nov ‘03) Objective: • Step up input consistency between CLO & DynMod. • Generate Dynamic Modelling outputs for possible use in IAM (likely socalled target load functions), as appropriate and required Collaboration outside WGE includes: • Historic emission/deposition trends (MSC-W; CIAM) • Target load function algorithm (CIAM)

  4. Target load functions: Similar to critical load functions (for infinite time horizon) compute functions for e.g. 4 different target years, 2020-2050, in which a chemical criterion has to be met (e.g. Al:Bc<1) ….

  5. Critical loads for heavy metals • 2002 preliminary results (CCE report) of ICP M&M call led to... • ...Further methodological development (Expert Group): (a) Review of the harmonised set of critical limits for heavy metals for soils and waters, whereby inclusion of limits for Hg and of human health effects; (b) Further development of transfer functions of Pb, Cd and Hg for soils and sediments, with emphasis on their applicability to the broad spectrum of European soils; (c) General methodological aspects, including • methods to consider heavy metal inputs to soils and surface waters other than atmospheric pollution, • requirements for and applicability of an effect-based approach for Hg

  6. Critical loads for heavy metals - nearfuture IAM relevant objectives (before spring 2004) include • Improve critical limits for ecotoxicological effects for Cd, Pb and Hg in soils and surface waters • Explore possibilities to use human health as end-point ... • Hg in surface waters (Hg content in fish) • Food quality criteria for assessing allowable Cd content in crops (e.g. pathway via wheat) [Pb …] • WHO drinking water limits for Cd, Pb and Hg • …implies the distinct modelling and mapping of critical loads for forest soils (ecotoxicology) and agricultural soils (human health). • Intended CCE call for data in autumn 2004 Yet unresolved issues for use in IAM include: • Exceedance assessments for agri-soils requires knowledge of non-atmospheric inputs (fertilization) ! Data requirements on e.g. agricultural practices are beyond WGE-ICP M&M domain.

  7. Further information: www.rivm.nl/cce or jean-paul.hettelingh@rivm.nl

More Related