Denmark's National Inventory Report 2005 - Submitted under the ...

tial emissions, actual mean differences on calculated CH 4 emissions for 1990-2003 are found to be –
17.8% +9.8%.
The final uncertainty on the emission factor is from uncertainty estimates in Table 8.9 and with the
use of GPG Equation 6.4 calculated to
Uncertainty of emission factor total % = SQRT(50 2 +30 2 +10 2 +10 2 +17,8 2 ) = 40.8%
Table 8.9. Uncertainties for main parameters of emissions of CH 4 for SWDS
Parameter Uncertainty Note
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The Waste amount sent to SWDS Since the amounts are based on
MSWT*MSWF 10% weighing at the SWDS the lower
value in GPG is used
Degradable Organic Carbon DOC 50%
Fraction of DOC dissimilated 30%
Methane Correction Factor 10%
Methane recovery
and Oxidation Factor 10% see the text
Methane Generation Rate Constant 17,8% see the text
8.2.3.2 Time-series consistency and completeness
The registration of the amount of waste has been done since the beginning of the 1990s in order to
measure the effects of action plans. The activity data is therefore considered to be consistent long
enough to make the activity data input to the FOD model reliable.
The consistency of the emissions and the emission factor is a result of the same methodology and
the same model used for the whole time-series. The parameters in the FOD model are the same for
the whole time-series. The use of a model of this type is recommended in IPCC GL and GPG. The
Half-life time parameter used is within the intervals recommended by IPCC GPG.
As regards completeness the waste amounts used, as registered in the ISAG system, does not only
include traditional Municipal Solid Waste (MSW), but also non-MSW as Industrial Waste, Building
and Construction Waste and Sludge. The composition of these waste types is according to Danish
data used to estimate DOC values for the waste types (refer GPG page 5.10).
8.2.4 QA/QC and verification
8.2.4.1 QC-procedure
QC-procedure on data input and handling is when the CH4 emission results of the runs from the
FOD model are compared/adjusted to the CH4 emissions in the CRF-tables.
8.2.4.2 QA-procedure
It is good practice and a QA-procedure to compare the emission estimates included in the inventories
with the IPCC default methodology.
In Table 8.10 default methodology is used combining the GPG and the IPCC GL according to the
referring text in the table. The used parameters are (as on the pages of the IPCC GL and IPCC
GPG) referred to in the table. As for the calculation of DOC in the default methodology the Danish
data is not suited for direct use. Referring to the formula in GPG p5.9 we assume (referring to the
Table 8.6) that A is “Cardboard”, “Paper”, “Wet Cardboard and Paper”, that B is “Plastic”, “Other
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