1、IMPACTUSE CASE:ENVIRONMENTAL IMPACT ASSESSMENT OF A CHANGE OF IFR PROCEDURES BY DSNAdirection gnrale de lAviation civileEUROCONTROL Showcase Summit 17/11/2025Didier Martin Head of the Methods and Tools Analysis Division at the Environment MissionAirport noise mapping at DGAC(1/2)Direction gnrale de
2、laviation civileDGAC adopted IMPACT in 2020 to replace US FAAs INM for airport noise mapping:1)Regulatory noise mapso Land-use planningo Noise insulation programmeso Multi-exposure(aircraft,road,train)o Using the LDEN noise exposure indicator2)Airport departure and arrival flight procedure(IFR)chang
3、eso Using LAmaxandNumber Above(LAmax)noise indicatorsAirport noise mapping at DGAC(2/2)Direction gnrale de laviation civile Ways of using IMPACT within DGAC slightly differ depending on purposes but are coordinated and harmonized Ex:guidelines on modelling assumptions and reference aircraft data to
4、be usedContext of an environmental impact assessmentDirection gnrale de laviation civileObjectives:provide all pertinent information in order to understand,measure and evaluate the environmental impacts induced by the modification of an IFR procedure on the geographic zones surrounding the airportDS
5、NA response to French regulation:2002:inform the public of future airspace changes 2012:undertake an environmental impact assessment for any project concerning modifications of instrument departure and approach procedures(IFR)at any airportConsultation before flight procedure change(s)Direction gnra
6、le de laviation civileACNUSANational independantadministrative authority for aircraft environmental impactAirport-specificEnvironmentalConsultative CommitteePublic enquiryCCEFor main airports&for significant changesFor a significant change(specific criteria)Contents of an environmental impact assess