By G. J. Heij, T. Schneider
This e-book includes the consequences and conclusions of intensive learn at the explanations and results of acidification of forests/forest soils and heathland within the Netherlands. In 1985 the Dutch precedence Programme on Acidification used to be began with a view to supply a extra concrete shape to the expanding curiosity of policy-makers within the results of pollution on ecosystems particularly. within the final 3 years, the study has thinking about acquiring a extra exact estimate of the emission of ammonia at the deposition of SOx, NOy and NHx, and in addition on quantifying results on wooded area and heathland ecosystems. This quantification of results incorporated experimental paintings version analyses, and derivation of serious quite a bit and degrees for wooded area and heathland ecosystems. in addition, situation analyses have been made with the Dutch Acidification platforms version (DAS) in an effort to assessment the effectiveness of coverage measures. The study itself, which shaped the foundation for this ebook, has been defined within the reviews on person initiatives. A precis of the clinical effects and conclusions is given in thematic experiences (added as annex).
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Additional info for Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification
The largest uncertainty is formed by the emission factors and the location of the sources. Another uncertainty is introduced by the assumption that all manure produced in a municipality is also applied within that same municipality. The transport of manure outside the municipality via so called manure banks is still performed on a small scale. It is expected, however, that transports of this kind will increase in the near future due to governmental restrictions on the amount of manure spreading.
The potential acid deposition for the years 2000, 2010 and 2050 for the three variants is presented in Table 2. The complete scenarios until the year 2050 for total potential acid deposition are shown in Figure 1. - 17 - Figure 1 clearly shows that a very strong reduction of acid deposition is expected during the period 1990 - 2000. This is especially caused by a strong decrease in NH, deposition, but considerabIe reductions are also expected for NO, and SO,. These reductions are, of course, the result of considerable emission reductions: NH, emissions are expected to be reduced particularly in the Netherlands.
These have been the main research items in the second phase too. The topics within the areas however differ from the fiist phase. - 26 - The study on effects on vegetation has been restricted mainly to Douglas fir on well drained, nutrient-poor sandy soils and to heathland. Douglas fir has been chosen as the "model tree", because of its resistance to pests and plagues and because, unlike most other coniferous species in the Netherlands, Douglas firhas needles with ages of several years, which is important in determining exposure-effect-relationships.
Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification by G. J. Heij, T. Schneider