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Title:
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Evaluation of ammonia emission abatement on the basis of measurements and model calculations
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Author(s):
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Published by:
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Publication date:
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ECN
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1-2-1999
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ECN report number:
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Document type:
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ECN-RX--99-003
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Article (scientific)
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Number of pages:
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8
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Published in: Environmental Pollution (Elsevier), , 1998, Vol.102, p.269-274.
Abstract:
Since 1990 regulations were implemented in order to decrease the ammoniaemissions in the Netherlands. These regulations include the coverage of
animal manure storage basins, the prohibition of application of manure in
winter and the obligatory incorporation of manure in the soil after
application. Furthermore, investments to decrease emission from housing
systems are stimulated. As the result of these regulations, it was estimated
that the ammonia emissions were decreased by 37 % in 1996 relative to 1990.
These estimates were based on statistical data and assumptions about the
effectiveness of the regulations. Measurement of air concentrations and
depositions between 1992 and 1996 and model results were used to evaluate the
decrease in emission estimates. The measurement do not show a distinct
decrease. Model results based on the estimated emissions show lower
concentrations and depositions than the measurements. These differences
cannot be attributed to variations in meteorological parameters or
uncertainties in model parameters. For the period 1984 to 1985 model
calculations agree reasonably well with measurements (with higher
uncertainty). In the more recent years, however, the difference between model
results and measurements becomes much bigger. It is concluded that the
abatement strategies with an assumed decrease in emission of 30-40 % were in
fact less effective. 23 refs.
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