Establishment of the external borders of the seventh sub-zone and the prohibition zone for the construction of regulated facilities in near the aerodrome area
The main aspects of the methodological recommendations of Rospotrebnadzor MR 2.5/4.3.0258-21 “Methodology for establishing the seventh subzone near the aerodrome area” are considered when performing design constructions of the outer boundaries of the seventh subzone and zones of prohibition of the construction of normalized objects from the conditions of exposure to aircraft noise, followed by instrumental verification of contours of an equal level by an equivalent and weighted average equivalent noise levels in order to bring the calculated boundaries to the objective data of instrumental studies, which makes it possible to ensure the establishment of the boundaries of noise zones in reasonable sizes. The main mistakes of designers when performing acoustic calculations and constructing design contours and the need to take into account the risk assessment for human health when justifying the placement of normalized objects within the seventh subzone are shown. On the example of an operating airfield, the method under consideration was tested. According to the results of field measurements, more than 5,500 noise events were recorded due to the passage of 644 aircraft, with the simultaneous use of 17 automated control points along flight routes, as part of the aircraft noise monitoring system, the boundaries of the noise zones of the Omsk (Central) airfield were verified. The novelty of the work performed lies in a detailed analysis of the spatial position of the aircraft during the actual operation of the aerodrome with the allocation of main track lines and average climb profiles during takeoff or descent during landing.