Acidification Research in The Netherlands: Final Report of by G. J. Heij, T. Schneider

By G. J. Heij, T. Schneider

This e-book comprises the consequences and conclusions of intensive learn at the reasons and results of acidification of forests/forest soils and heathland within the Netherlands. In 1985 the Dutch precedence Programme on Acidification was once all started on the way to provide a extra concrete shape to the expanding curiosity of policy-makers within the results of pollution on ecosystems specifically. within the final 3 years, the study has fascinated by acquiring a extra actual 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 integrated experimental paintings version analyses, and derivation of severe quite a bit and degrees for wooded area and heathland ecosystems. in addition, state of affairs analyses have been made with the Dutch Acidification platforms version (DAS) as a way to evaluation the effectiveness of coverage measures. The examine itself, which shaped the root for this booklet, has been defined within the studies on person initiatives. A precis of the clinical effects and conclusions is given in thematic reviews (added as annex).

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Additional resources for Acidification Research in The Netherlands: Final Report of the Dutch Priority Programme on Acidification

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2 Potential acid deposition until the year 2050 Based on historical emissions and the emission scenario up to the year 2000, the average deposition for the Netherlands in the year 2000 will be 2240 mol (rounded down to 2200) potential acid per hectare per year. This means a reduction of more than 50% compared to the potential acid deposition in 1989 (which was about 4800 mol H+). Apart from the average uncertainties in emission figures, the average uncertainty in the calculated deposition levels is at least 20%.

Highest emissions are found in the southern and central parts of the Netherlands, as a result of intensive livestock breeding. Locally, N H 3 emissions can vary much more than is shown on the map. -46- 0- 750 Fig. 3 750-1500 1500-2250 .............. .............. .............. .............. .............. .............. 1), together with those for the remaining animal categories (Van der Hoek, 1989). , the data from Buijsman et al. (1984) have been used. The spatial distribution of the emissions is improved compared to the earlier published data by Buijsman et al.

The Dutch Priority Programme on Acidification did not include any research on this. - The effects of NH3 on heathland vegetations were extensively studied as part of the Dutch Priority Programme on Acidification,but a critical level could not be indicated. Table 6. Critical levels of and SO2 for forests coniferous forest (poor sandy soils) Q concentrations* 50 deciduous forest explanation 50 these critical levels are related to visible damage and to inhibition of translocation of assimilates to roots 25 these values are related to visible damage (daily average) so2 25 (yearly average) * during growing season - 25 - 1.

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