Annual Report 2001 - Flughafen Wien

Environmental Statement
Lower noise levels, new complaint hotline
Fewer approaches over Vienna
___As a result of construction activity, only 2,500 m of Runway 11/29 was in operation from
30 August to 18 November. This led to higher use of Runway 16/34 for starts by long-haul
aircraft. In contrast to original plans, it was not possible to completely avoid night flights in
Direction 34.
___When viewed in total, winds came primarily from the west in 2001. This led to an increase
in take-offs over Direction 29, from 70.4% of total starts in 2000 to 74.0% in the reporting
year. In addition, the number of landings in Direction 34 rose from 38.2% in the prior year to
46.7% in 2001. At the same time, the number of approaches over Vienna (Runways 11 and 16)
declined from 42.0% to 36.4%.
Reduction in night-time flights
___The average number of flight movements during night hours decreased from 33.4 in 2000
to 31.8 in the reporting year. This corresponds to a share of 6.3%, the lowest amount in the
last decade.
___The proportion of quieter Chapter 3 aircraft remained level at 97% in 2001, and number of
propeller-driven aircraft rose from 19.3% to 21.5%.
Noise pollution declines
___These facts had a positive impact on values recorded by our 13 measurement stations in
2001 (2000: 12 stations), which include the newly constructed facility in Himberg. With the
exception of Margarethen/Moos, all measurement stations showed a reduction in annual noise
levels. The greatest decrease was recorded in Fischamend with 2.7 dB(A). The 0.9 dB(A) rise
in the noise level at Margarethen/Moos resulted from a higher number of landings in Runway
Direction 34. Average maximum levels also declined slightly. Data required for the calculation
of noise zones in 2001 was not available when this annual report was prepared.
___Noise zone calculations for 2001 show a slight decrease in total area because of stagnation
in flight movements during the six heaviest traffic months of the year and slight decline in
night flights. In conjunction with the mediation process, the calculation formula in use since
1977 was replaced by a new method that meets ÖAL Guideline 24 and EU regulations. Future
noise zones will therefore show both total figures and seperate data for day (6 a.m. to 6 p.m.),
evening (6 p.m. to 10 p.m.) and night (10 p.m. to 6 a.m.).
FANOMOS
___Our Flight Track and Noise Monitoring System (FANOMOS) registered 165 (2000: 576)
deviations from normal flight paths in 2001, or 0.2% of all take-offs. This clear improvement
resulted from the designation of waypoints for take-off routes and their input in the flight
management system. In addition, the system upgrade started in 2000 was completed at a cost
of € 180,000.
Mediation Process
___Our activities in the area of environmental controlling focused on participation in the
mediation process, in particular the working group on noise. We conducted a total of 15 measurement
series at points throughout Vienna and Lower Austria to confirm the correct positioning
of permanent measurement stations and to collect new data. Additional parallel measurements
together with the City of Vienna completed this extensive program, and we were
able to meet our objective of having participants in the mediation process accept data supplied
by FANOMOS.
62 Environment
Annual Report 2001