Monitoring van de geluidbelasting door militaire luchtvaart bij Volkel, Uitvoering en resultaten over het jaar 2000
2002
A description is geven of the set up of the results of a system for
permamnet measurements of noise from military aircraft near Volkel
military airbase. Here, at a location approximately 2000 m south-west of
the runway, noise events are recorded automatically. The levels of these
events were processed from March 2000 till January 2001 to obtain the
value for the 'averaged' noise load in such a way as to allow comparison
with the calculated annual noise load due to military aircraft operation
at this airbase. In the period from March till December 2000, the
measured noise load equalled 51 plus or minus 2 Kosten units (Ke), the
Dutch noise unit for measuring aircraft noise. In Lden, the noise load
amounts to 69 dB(A). The load of 51 plus or minus 2 Ke is within the
margins of the load calculated by the National Aerospace Laboratory (NLR)
over the year 2000. Depending on the assumed lateral dispersion of the
flight routes across nominal ground tracks, these margins are 48 and 51
Ke. The value of 48 Ke is almost 8 Ke higher than the noise loads
calculated for previous years. This increase is related to the
completion (by the end of 1999) of a technical and operational update
programme for the F16 aircraft (Mid-Life Update, MLU) at Volkel. As a
result, the flight profiles of the aircraft have been changed.The
measurements at Volkel have revealed that large differences, in time as
well as in space, may occur in the annual noise load. A great number of
the changes in the aircraft operation responsible for these differences
will be logged and used in the calculation of the annual noise load.
However, some aspects may be overseen due to legal regulations or
agreements. The measurements at Volkel have shown that the assumption of
a large lateral dispersion of the flight routes leads to an
underestimation of the annual noise load of 3 Ke at the measurement
location, while at other locations this assumption may lead to the same
degree of overestimation For the time being, continuation in the
measurement of aircraft noise close to an airport is recommended.
Regarded as being worthwhile is investigating to see if short
measurements closer to the airport runway, and measurements on a larger
number of aircraft types under different technical and operational
conditions, may present an alternative to permanent measurements at one
location and for one aircraft type. By comparing the measured noise
emission with the emission values used in the calculations, it will
become clear to what extent the real flight, and meteo and environmental
conditions, cause a difference in the 'real' noise load compared to the
calculated noise load. This will contribute to the reliability of the
monitoring of the noise load around airports. Furthermore, by repeating
the measurements every year, the development in time of the fleet's noise
emission can be followed.
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