Washington Dulles International Airport (IAD) Aircraft ... · aid toward the development of...
Transcript of Washington Dulles International Airport (IAD) Aircraft ... · aid toward the development of...
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Washington Dulles International Airport (IAD)
Aircraft Noise Contour Map Update
6th Working Group Briefing
1/7/19
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Agenda • Study Purpose
• Background – Summary of last stakeholder meetings
– Refresher on DNL, noise contours
– AEDT model inputs
• Discussion – Updated aircraft noise contour map – Comparisons to existing noise overlay zones and EIS – Proposed overlay
• Next Steps
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Study Purpose • Update the Dulles Airport noise contour map to reflect
future changes in the aviation environment including:
- Airline operations
- Fleet mix
- Airfield development
- Terminal
- Cargo
- Long term FAA NextGen implementation
- Flight paths
- Runway use
- Airfield capacity
- FAA air traffic control procedures
- Triple simultaneous operations
- Restricted airspace
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Study Purpose (cont.)
• Provide local jurisdictions accurate information to guide effective land use decisions for today and in the future
• Provide local jurisdictions with a land use compatibility planning tool to inform - Envision Loudoun
- Dulles Suburban Plan
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Background - Technical Working Group
• Loudoun County • Fairfax County • Town Of Herndon • Airlines- MWAC • FAA
– ADO – ATO – Region – Headquarters
• Dulles Airport – Airport Manager – Airport Operations – Government Affairs – Noise Office – Communication – Engineering and Planning
• Consultant Support (Ricondo & Assoc. and HMMH)
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Background - IAD Noise Contours and Local Land Use Planning
• Long-range noise contours have been a resource and an aid toward the development of compatible land uses
• Noise contours help to inform local land use planning • Aircraft noise, and its impact on regional communities,
was and is a primary consideration for airport planning • Noise contour maps are developed based on scenarios
which are expected during or at full-build of the airport
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Background - Stakeholder Meetings • April 4, 2018 - Kick Off Meeting
• April 20, 2018 - Meeting #2 Link
• June 6, 2018 - Meeting #3 Link
• June 27 & 28, 2018 - Public Information Workshops #1 and #2
– Public Information Workshop Presentation
– Public Information Workshop Comments and Responses
• August 13, 2018 - Meeting #4 Link
• September 25, 2018 - Meeting #5 Link
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Background - Airport Environmental Decision Tool (AEDT) Overview
• FAA-developed and adopted software tool for computation of noise contours
• Accurately computes noise contours based on many operational characteristics
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Background - AEDT Overview
*Flight tracks are controlled by FAA
*
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Background - Day/Night Average Noise Level (DNL)
• A way to describe the noise dose for a 24-hour period
• Accounts for noise event “noisiness” (SEL)
• Accounts for number of noise events
• Provides an additional weighting factor of 10 dB for nighttime (10:00 pm to 6:59 am) operations – 1 nighttime noise event is equivalent
to 10 daytime noise events
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Background - What is a DNL Noise Contour?
• DNL – Day-Night Average Sound Level – Represents average noise for a 24-hour period – 10 dB weighting factor for nighttime (10:00 pm to 6:59 am)
operations – 24-hour average noise level on the basis of annual aircraft
operations
• Average Annual Day (AAD) – represents the 24-hour average of total annual operations
• DNL Contour – a line representing equal DNL
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Background - What Affects Aircraft Noise Contour Shape and Size?
• Size – Aircraft equipment type (certified noise levels, number of engines,
and size) – Number of aircraft operations – Nighttime operations
• Shape
– Runway location – Runway use (how frequently is the runway used)* – Operation type (arrival, departure or both)* – Flight track locations and dispersion*
* FAA controlled
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Discussion - Methodology for Contour Development
• Determine Airport’s Annual Service Volume (ASV)
• Define Average Annual Day operational level – Day and night time activity
• Identify Aircraft Fleet Mix – Passenger, Cargo, General Aviation, Military, other
– Aircraft size
• Define Flight Tracks* – Arrival and departures by origin/destination
• Load data into AEDT model
• Generate 60 – 75 DNL contours * FAA controlled
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Discussion - Methodology for Contour Development (cont.)
• Approximately 1M operations
• Fleet Mix – 82% Passenger (narrow & wide body)
– 7% Corporate charter
– 5% Passenger (regional)
– 5% General Aviation
– 1% Cargo/Freighter
– <1% Military
• 88% Day / 12% Night Operations
• FAA Defined Airfield Flow – 55% / 45% (north / south)
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Discussion - Methodology for Contour Development (cont.)
Average Annual Day Operations – 5 Runway Airfield
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Discussion - New Noise Contour Map
Source: Esri, HERE, DeLorme, MapmyIndia, OpenStreetMap Contributors, and the GIS User Community, May 2018 (basemap); U.S. Census Bureau, Geography Division, TIGER/Line Shapefiles, 2017 (place, county boundaries); Fairfax County, 2017, https://data-fairfaxcountygis.opendata.arcgis.com/ (accessed 12, 2018) (land use); Loudoun County, 2018, https:/ /data loudoungis.opendata.arcgis.com/ (accessed 12, 2018) (land use); Ricondo & Associates, Inc., May 2018 (data collection area and general land use categories); HMMH, December 2018 (draft composite contours).
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Discussion - New Noise Contour DNL 60 and DNL 65
Source: Google Earth (aerial basemap); HMMH, December 2018 (draft composite contours).
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Discussion - New Noise Contour vs. Loudoun County Noise Overlay Zones
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community, May 2018 (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); HMMH, December 2018 (draft composite contours).
DNL 60+ Area DNL 65+ Area
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Discussion - New Noise Contours vs. Fairfax County Noise Overlay Zones
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community, May 2018 (aerial basemap); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
DNL 60+ Area DNL 65+ Area
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Discussion - Land Use Compatibility
• Protect for Today’s Airport use and for Tomorrow
• The Airports Authority will be recommending that Loudoun County and Fairfax County protect their existing Airport Impact Overlay Districts (DNL 60 and DNL 65) and the new Noise contours.
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Discussion - Land Use Compatibility DNL 60+ Area DNL 65+ Area
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community, May 2018 (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); URS, November 2005 (EIS 2025 contours); HMMH, December 2018 (draft composite contours).
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Discussion - Silver District West & Dulles Suburban Center/Westfields J
DNL 65+ Area
Source: Google Earth (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
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Dulles Suburban Center/Westfields J DNL 65+ Area
Source: Google Earth (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
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Silver District West DNL 65+ Area
Source: Google Earth (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
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Discussion - Silver District West & Dulles Suburban Center/Westfields J
DNL 60+ Area
Source: Google Earth (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
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Silver District West DNL 60+ Area
Source: Google Earth (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
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Dulles Suburban Center/Westfields J
DNL 60+ Area
Source: Google Earth (aerial basemap); Loudoun County, Virginia, 2017 (Loudoun airport impact overlay districts); Fairfax County, Virginia, 2017 (Fairfax airport impact overlay districts); HMMH, December 2018 (draft composite contours).
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Recommendations
• Adopt DNL 60 & 65 overlay based on the following:
- New noise contour (2018/2019 Study)
- Existing airport impact overlay district
• Noise contours should promote land use compatibility for current and long term development
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Process and Next Steps (as of January 7, 2019)
Inventory
•Evaluate current and future plans (MWAA and FAA)
•Assess existing operation conditions
Forecast •Determine full-build scenario(s) •Determine maximum potential operations •Determine potential aircraft runway use and flight tracks
Noise Modeling
•Develop baseline noise model • Calculate potential aircraft noise levels for full-build scenario(s)
• Determine appropriate composite of potential scenarios, if appropriate
Conclusions • Recommend potential aircraft noise contours for land use planning
In Process
Completed
Upcoming
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Next Steps
• Schedule public workshop (timing based on feedback)
• Jan. 9 – Fairfax County Westfields Unit J Task Force
• Jan. 11 – Loudoun County Planning staff presentation
• Hold public workshop & consider workshop feedback
• Feb 28 – March (TBD) – Finalize recommended overlay district for land use planning
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