Chemistry Reference
In-Depth Information
0
OML-DEP model domain covering the Tange area
Major roads
1
2
4
6
8
4
NH
3
emission from area sources [Kg NH
3
-N/ha] for the year 2007
01
2
6
8
Kilometers
Kilometers
Urban areas,Villages and industry
Lakes
Forest
< 2
4 - 6
2 - 4
6 - 8
8 - 10
10 - 15
15 - 20
> 20
NH
3
emission from point sources [Kg NH
3
-N] for the year 2007
1 - 500
500 - 1000
1000 - 2000
2000 - 5000
5000 - 10000
10000 - 20000
012
4
6
8
Kilometers
NH
3
concentration [µg/m
3
] for the year 2007
>1.0
1.0 - 1.5
1.5 - 2.5
2.5 - 3.0
3.0 - 5.0
> 5.0
Fig. 12 High-resolution assessment of atmospheric nitrogen deposition in Denmark accounting
for emissions from single farms. Figure obtained from Geels et al. [
80
]
Danish buffer zone approach. In England and Wales, the screening requires detailed
modelling in case the AST shows N depositions or NH
3
concentrations that exceed
4% of critical loads or levels for European sites, 20% of Sites of Special Scientific
Interest (SSSI) or 50% of threshold values for local conservation sites. In this case,
either ADMS or AERMOD is applied for the detailed modelling. A permit is
granted only when detailed modelling demonstrates that 20%, 50% or 100% of
the critical level or load is not exceeded at the European sites, SSSIs or local
conservation sites, respectively. In Denmark, smaller livestock farms are regulated
