Institutions and Responsibilities • The Austrian Emission Inventory and all reporting obligations are supportedby the Umweltbundesamt • By law: environmental control act 1998
Institutions and Responsibilities Excerpt from the Austrian Environmental Control Act Purpose and Tasks of the Federal Environment Agency are among others: • To establish the technical expertise for compliance with the United Nations Framework Convention on Climate Change........ • To develop and keep inventories, balances, registers, and environmental information systems todocument the state and development of the environment.........
Austrian specific Estimation Methods • Method 1 Used to estimate emissions from the disposal of „Residual Waste“ • Method 2 Used to estimate emissions from the disposal of „Non Residual Waste“
Methodology for Emission Calculation of „Residual Waste“ Model of Tabasaran-Rettenberger Gt = 1,868*DOC*(0,014*T+0,28)*(1-10(-kt)) Gt cumulated landfill gas after t years [m3/t humid waste] DOC bio-degradable organic carbon content of deposited waste [kgC/t humid waste] T mean temperature of disposal site [oC] k degradation constant t number of years DOC 200 - 120kg/thumid waste T 30°C k 0,035 Calculation period: 31 years
Sources of Data for the Emission Calculation of „Residual Waste“ • Activity data 1998 to 2003 from the Austrian landfill database managed by the Umweltbundesamt Before 1998 from the Austrian waste management plan recalculated (including residual waste from administrative facilities) • Landfill gas recovery National study • Biodegradable organic carbon National studies • Oxidation Factor IPCC default value
Methodology for Emission Calculation of „Non Residual Waste“ Model of Marticorena Mt = M0*e-(kt) Mtlandfill gas formation potential at time t [m3/t humid waste] M0 landfill gas formation potential [m3/t humid waste] k degradation constant k = -ln (0.5) / t 1/2 t 1/2 mean ‚halflife‘ of readily or slowly degradable waste respectively t number of years • Readily degradable waste: ‚halflife‘ 1-20 years • Slowly degradable waste ‚halflife‘ 20-100 years • Calculation period: 100 years
Sources of Data for the Emission Calculation of „Non Residual Waste“ • Activity data 1998 to 2003 from the Austrian landfill database managed by the Umweltbundesamt Before 1998 no data available • Organic carbon content National studies • Half life National studies
Methodology for Emission Calculation of „Compost Production“: Emission factors
Sources of Data for the Emission Calculation of „Compost production“ • Activity data The activity data were taken from several national studies. For years where no data were available they were inter-/extrapolated or the value of the year before was used respectively. • Emission factors National studies
Which Issues were raised during the UNFCCC Review Process? (1) • 6.B Waste-water Handling: • Information gaps / the methodology used for CH4 emissions from domestic and industrial waste water, is not in line with the IPCC good practice guidance plan to revise the national methodology for the 2006 submission • 6 D Other Waste • Compost production should be reported under 6 A Solid waste disposal on land. Will be included until submission 06
Which Issues were raised during the UNFCCC Review Process? (2) • 6 A 1 Managed Waste Disposal on Land • Austria used an methane oxidation factor of 0.2 • In this submission because recommended by the ERT (Expert Review team) the IPCC default value was used • the composition of wastes reported in the CRF is constant through the years. = lack of data for the next submission efforts will be made to update the data
Which Issues were raised during the UNFCCC Review Process? (3) • 6 A 1 Managed Waste Disposal on Land (continued) • it would be more appropriate to use extrapolation techniques for those years where no data are available (i.e. non-residual wastes before 1998), instead of considering it as constant Efforts to improve the time series of non-residual waste will be made for the next submission
Uncertainties in the waste sector • 6 A 1 Managed Waste Disposal on Land • Expert judgement • National Study estimated uncertainty of data of submission 2000: 35% emission factors / 25% activity data • Since then method continually improved uncertainty of data of submission 2004: 30% emission factors / 15% activity data
QA/QC procedures • Involvement of national experts • Comparison of national methodology with IPCC methodology
Final Slide Thank you for your attention!