In order to initiate the study, ‘best practice’ examples (e.g. Catania Airport) and a brief bibliographic review was performed. Later, an airline with regular flights in Cluj Airport was selected. One key aspect in the selection procedures to be analysed was the use of Noise Abatement Departure Procedures (NADPs) – NADP1 and NADP2. Through the use of both types of procedures, it was already known that fuel consumption rates differ from one procedure to another. Even so, an understanding related to real noise variation, as well as regarding differences in terms of emissions and air quality were missing.
Therefore, an investigation of this gap was launched to understand the role of interdependencies in an airport context, through the use of airline data. The data analysis aimed to demonstrate if the initial purpose of using NADPs (i.e. reducing noise and emissions) will be confirmed.
Data from the Aeronautical Information Publication (AIP) about the use of NADPs and input airline data were used (flight data sets from February 2020 and July 2020). The information included runway requirements for using NADPs, flight phase, flight level, latitude, longitude and fuel consumption – for the same aircraft type, engine and maximum take-off weight (MTOW). The data set was reduced to a total of ten NADP procedures.
Through the use of simulation tools, a Geographic Information System map was developed and the population was distributed uniformly (due to unavailable precise data). Noise contours were computed using the Lday indicator, for five NADP1 and five NADP2 procedures. An analysis in terms of number of people exposed to different levels of noise was also performed.
Fuel consumption data was used for the investigation of the quantity of emissions produced from both NADPs. Further analyses were performed to determine the CO (Carbon monoxide) and NOX (Nitrogen oxides) emission (at the level of residents from Cluj-Napoca city) and dispersion of pollution (at the level of the airport). CO and NOX exposure of the population to different particle concentrations was additionally derived.