1. General Model Information
Name: CL_NE-BAVARIA - critical loads model for NE Bavaria
Acronym: CL_NE_BAVARIA
Main medium: terrestrial
Main subject: biogeochemistry
Organization level: landscape, ecosystem-complexes
Type of model: not specified, static-algebraic equations
Main application: decision support/expert system
Keywords: critical load, critical levels, nitrogen deposition,proton deposition, soil acidification, forest ecosystems, forest decline, spatially distributed, GIS-based, empirical equations
Contact:
Romanus Lenz
GSF- National Research Center for Environment and Health
Project group for the potential threat to the environment posed by chemicals
P. O. Box 1129
85758 Oberschleissheim, Germany
Phone: +49-89-3187-2954
Fax : +49-89-3187-3369
email: Email:lenz@gsf.de
Author(s):
Dr. Romanus Lenz
CL_NE-BAVARIA is supported by:
Bundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie (BMBF)
Abstract:
contents of the model
The model estimates critical loads of proton and nitrogen in forest ecosystems, i.e.
other ecosystems are NOT included. A critical load has been defined as "the highest
deposition of a compound that will not cause chemical changes leading to long-term
harmful effects on ecosystem structure and function" (Nilsson 1986).
First, certain physical and chemical properties of an ecosystem describing its
sensitivity to the pollutant under discussion must be measured or estimated. This
information on ecosystem sensitivity can be compared with present pollutant deposition
data, to determine which areas currently receive deposition levels which exceed the
area's critical laod. These areas of exceedance indicate where present levels of
pollutant deposition increase
Principles of the model
The required physical and chemical properties of an ecosystem describing its sensitivity
to proton and nitrogen deposition include basic soil and forest management data which are
available for larger areas. Many of them are available on digitized maps. Quantities
(i.e. deposition and risks of ecosystem damage) are computed by relatively simple
algebraic equations or by table functions, many of them being on an ordinal scale.
Calculations are done employing the auto macro language (AML) of a commercially available
geographic information system (ARC/INFO).
Author of Abstract: UFIS - Environmental Research Information System
II. Technical Information
II.1 Executables:
Operating System(s): Calculations are done employing the auto macro language(AML) of a commercially available geographic information system (ARC/INFO).
II.2 Source-code:
Programming Language(s):
II.3 Manuals:
Complete model documentation: Lenz, R.: Charakteristika und Belastungen von Waldoekosystemen NO-Bayerns - eine landschaftsoekologische Bewertung auf stoffhaushaltlicher Grundlage, Berichte des Forschungszentrums Waldoeko, Reihe A, Band 80 (1991).
II.4 Data:
III. Mathematical Information
III.1 Mathematics
This is a list of model equations sorted by their characteristics with hypertext links for more details.
III.2 Quantities
This is a list of model quantities sorted by their characteristics with hypertext links for more details.
III.2.1 Input
III.2.2 Output
IV. References
Lenz, R., 1991. Charakteristika und Belastungen von Waldoekosystemen NO-Bayerns - eine landschaftsoekologische Bewertung auf stoffhaushaltlicher Grundlage Berichte des Forschungszentrums Waldoeko Reihe A, Band 80.
V. Further information in the World-Wide-Web
VI. Additional remarks
Additional information
Last review of this document by: R. Patzak : 1. October 1997 -
Status of the document:
last modified by
Tobias Gabele Wed Aug 21 21:44:40 CEST 2002