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The government hands over a study on airport noise to the concerned authorities |  the interior

The government hands over a study on airport noise to the concerned authorities | the interior

The Belgian state presented an impact study on noise pollution around Brussels Airport to interested parties, La Libre and la Dernière Heure report. The study included fourteen scenarios that should be able to alleviate the inconvenience of the local population.

The study, prepared by the specialized agency Envisa, was handed over to the relevant municipalities, local residents’ associations, the Walloon Region and Brussels on Wednesday evening. At the end of 2020, the state was ordered to provide the parties with a new impact study by June 1, 2022, after the first draft was deemed insufficient.

According to the study, “both in terms of health for the largest number of local residents and in terms of the economic viability of the airport,” extending the 25-liter route by 900 meters is the “most efficient scenario.” The rooms can then be centered there under certain standard noise conditions, with a left turn from 700 feet in height. 50% to 100% of the aircraft that take off will depart from this extended runway. This will require an investment of 50 million euros.

Another, more credible solution to this study is the modernization of the fleet at Zaventem. “This will undoubtedly have a positive effect on noise profiles,” says the study author. Pollutant emissions will also be reduced. In 2019, 12 percent of new generation aircraft (Airbus A320neo, A350, A380, 737 Max, 787, etc.) The study proposes increasing this share to 28 percent, reducing noise profiles by more than 15 percent.

Envisa did not completely redo the study, but it did perform additional analyzes that were added to the initial study. According to the Cabinet chaired by Mobility Minister George Gilkennett (Ecolo), the various scenarios will soon be presented “to other members of the federal majority and members of the Consultation Committee”.

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In a summary of the document, the Cabinet said: “This study allows at least to form the current situation and possible solutions, including the most disruptive and the most difficult for consensus, which can then be worked on.”

As for the 25L runway extension by 900m in order to use the left turn more often for departing flights (instead of the 25R runway), the summary states that “Given the airport’s geographic position, a slight shift in activities to the east could avoid overflying southwest municipalities Partial airport. This “1.b” scenario is divided into several sub-scenarios depending on the percentage of departures that will turn from 25R to 25L and the altitude at which the left turn begins.

But there is no miracle solution: there are possibilities to improve flight frequency reduction and reduce global noise nuisance, but the cost of investment and shifts in residual noise nuisance must also be taken into account. For example, a 25 liter runway extension appears to be beneficial only in terms of noise pollution if the aircraft is actually turning left at a low altitude (700 ft), but this will lead to additional noise pollution in municipalities south of the airport.

In other scenarios, changes such as extending the operating night (with a limit on the number of flights) to 7 a.m. (instead of 6 a.m.) are being rolled out, but this would have a significant economic impact on the airport. Also revised: early take-off from Runway 25R, halting cargo flights, new approach procedures on landing or even routing departure from Runway 25R along the same path over less populated areas.

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