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Titolo:
A review of the calculation procedure for critical acid loads for terrestrial ecosystems
Autore:
van der Salm, C; de Vries, W;
Indirizzi:
Alterra Green World Res, NL-6700 AA Wageningen, Netherlands Alterra Green World Res Wageningen Netherlands NL-6700 AA n, Netherlands
Titolo Testata:
SCIENCE OF THE TOTAL ENVIRONMENT
fascicolo: 1-3, volume: 271, anno: 2001,
pagine: 11 - 25
SICI:
0048-9697(20010423)271:1-3<11:AROTCP>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
FOREST CROWN CONDITION; SPODOSOL BS HORIZONS; SOIL ORGANIC-MATTER; ENVIRONMENTAL-STRESS; AQUEOUS ALUMINUM; RELEASE RATES; DEPOSITION; SOLUBILITY; DISSOLUTION; NETHERLANDS;
Keywords:
critical load calculations; acid deposition; empirical relationships;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: van der Salm, C Alterra Green World Res, POB 47, NL-6700 AA Wageningen, Netherlands Alterra Green World Res POB 47 Wageningen Netherlands NL-6700 AA
Citazione:
C. van der Salm e W. de Vries, "A review of the calculation procedure for critical acid loads for terrestrial ecosystems", SCI TOTAL E, 271(1-3), 2001, pp. 11-25

Abstract

Target loads for acid deposition in the Netherlands, as formulated in the Dutch environmental policy plan, are based on critical load calculations atthe end of the 1980s. Since then knowledge on the effect of acid deposition on terrestrial ecosystems has substantially increased. In the early 1990sa simple mass balance model was developed to calculate critical loads. This model was evaluated and the methods were adapted to represent the currentknowledge. The main changes in the model are the use of actual empirical relationships between Al and H concentrations in the soil solution, the addition of a constant base saturation as a second criterion for soil quality and the use of tree species-dependant critical Al/base cation (BC) ratios for Dutch circumstances. The changes in the model parameterisation and in theAl/BC criteria led to considerably (50%) higher critical loads for root damage. The addition of a second criterion in the critical load calculations for soil quality caused a decrease in the critical loads for soils with a median to high base saturation such as loess and clay soils. The adaptation hardly effected the median critical load for soil quality in the Netherlands, since only 15% of the Dutch forests occur on these soils. On a regional scale, however, critical loads were (much) lower in areas where those soilsare located. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 20:37:28