ROLE OF MEASUREMENTS AND NUMERICAL MODELS IN THE ASSESSMENT OF AIRPORT NOISE

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Gerald Holt
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1 1 ROLE OF MEASUREMENTS AND NUMERICAL MODELS IN THE ASSESSMENT OF AIRPORT NOISE GIOVANNI BRAMBILLA CNR ISTITUTO DI ACUSTICA O.M. CORBINO, ROMA MAURIZIO BASSANINO ARPA LOMBARDIA SETTORE AGENTI FISICI, MILANO

2 2 ASSESSMENT OF AIRPORT NOISE NOISE IMPACT ON THE GROUND DUE TO AIRCRAFT MOVEMENTS NOISE IMPACT ON THE GROUND DUE TO SINGLE AIRCRAFT FLY-OVER

3 3 DETERMINATION OF THE L VA EQUAL COUNTOUR LINES ZONE A ZONE B ZONE C D.LGS.. 17/1/2005 N. 13 IMPLEMENTING THE DIRECTIVE 2002/30/CE A+B+C = AREA OF AIRPORT NOISE IMMISSION

4 4 NOISE MONITORING SYSTEMS

5 5 NOISE MONITORING SYSTEMS SOUND EXPOSURE LEVEL SEL SEL t 1 2 = 10 log 10 t0 t1 ( L /10) AF dt 80 db 70 25/ db casa_riposo_25/07/ CH1 - SPL E 56 decibel / s 25/ / / / / Frequency 63K Hz 31.5K 16K 8K 4K 2K 1K X Y Z 25/ Hz / s 25/ / / / / Time 90 db

00 25/07 10.37.30 Frequency 63K Hz 31.5K 16K 8K 4K 2K 1K 500 250 125 63 31.5 16 X Y Z 25/07 10.35.18 500 Hz 48.50 25/07 10.35.00 s 25/07 10.

6 6 NOISE MONITORING SYSTEMS LIMITED NUMBER OF SITES DUE TO COST CONSTRAINTS REDUCED SPATIAL REPRESENTATIVENESS OF NOISE IMPACT DETECTION OF VIOLATIONS OF THE NOISE ABATEMENT PROCEDURES (TOGETHER WITH RADAR FLIGHT TRACKS) ASSISTANCE IN ADDRESSING LAND USE AREAS (ZONE A, B, C) ASSISTANCE IN NOISE MAPPING OUTSIDE THE AIRPORT AREA ASSISTANCE IN THE INVESTIGATION AND MANAGEMENT OF COMPLAINTS

(TOGETHER WITH RADAR FLIGHT TRACKS) ASSISTANCE IN ADDRESSING LAND USE AREAS (ZONE A, B, C)

7 7 NUMERICAL MODELS OF AIRCRAFT NOISE AIRPORT DATA RUNWAYS FLIGHT PATHS GEO DATA TRAFFIC DATA AIRCRAFT TYPES MOVEMENTS METEO FLIGHT PROFILES NOISE DATA-BASE EQUAL NOISE LEVEL CONTOURS (L VA. L Aeq. L den. )

TYPES MOVEMENTS METEO FLIGHT PROFILES NOISE

8 8 NUMERICAL MODELS OF AIRCRAFT NOISE

9 9 WHY MODEL AIRCRAFT NOISE? TO PORTRAY THE ACTUAL SITUATION AT A REASONABLE COST TO MAKE PREDICTIONS OF DIFFERENT SCENARIOS TO CONDUCT WHAT IF ANALYSES

10 10 DIFFERENCES BETWEEN MEASURED AND PREDICTED NOISE

11 12,0 10,0 G. BRAMBILLA, M. BASSANINO 11 DIFFERENCES BETWEEN MEASURED AND PREDICTED NOISE MD A Numero di casi Std. Dev = 1,68 Mean = 4,7 N = 437,00 Numero di casi Std. Dev = 1.58 Mean = 2.25 N = ,0-2,0-4,0 0,0 2,0 4,0 6,0 8,0 Differenza assoluta (Misurato - INM) Diff. Misurato-Simulato (Stage 1, ICAO A, >45 ) ,0-6,0-8,0 0,0-2,0 2,0 4,0 6,0 8,0 Numero di casi Std. Dev = 1,96 Mean = -,2 N = 437,00 Numero di casi ,0-12,0 Differenza assoluta (Misurato - INM) Diff. Misurato-Simulato (Stage 5, ICAO A, >45 ) Std. Dev = 1.56 Mean =.46 N =

00-6,0-2,0-4,0 0,0 2,0 4,0 6,0 8,0 Differenza assoluta (Misurato - INM) Diff.

12 12 GROUND PROJECTION OF FLIGHT TRACK COMPUTATION PROCEDURES APPLICATION OF PROFILE TO THE TRACK FOR N. AIRCRAFT OF SAME TYPE STANDARD FLIGHT PROFILE FOR SINGLE AIRCRAFT TYPE ADD GROUND TRACK DISPERSION IF NECESSARY

13 13 GROUND PROJECTION OF FLIGHT PATHS

14 14 FLIGHT PROFILE

15 15 FLIGHT PROFILE 3500 MD82 - Volo Altezza a.g.l. (m) Altezza Velocità (Knots) 1000 Velocità (nodi) INM STD S INM STD S2 INM STD S3 INM STD S4 0.0E E E E E E E E E E+04 Distanza da testata pista (m) 50 0

16 16 FLIGHT PROFILE MD82 30 C 994 mbar Altitudine (m) H stage 1 H stage 2 H stage 3 H stage 4 H_6765 H_6764 H_6785 H_6774 H_6761 H_6755 H_ path (m)

H stage 4 H_6765 H_6764 H_6785 H_6774 H_6761 H_6755 H_6789

17 AIRCRAFT TYPE SUBSTITUTION IN THE DATA-BASE 17 ICAO NAME AIRCRAFT SUBSTITUTION SUGGESTED BY INM AIRCRAFT IN INM DATABASE MOVEMENT AND RUNWAY SEL MEASURED db(a) Aver. SEL PREDICTED db(a) Difference db AT72* Atr Aerospatiale Aeritalia Alenia ATR 72 HS748A app dep BA46 British Aerospace BAe- 146 BAE146 app dep C500 Cessna 500 Citation 1 CNA500 app dep DH8C De Havilland Canada DHC Dash 8 DHC830 app dep D328* Dornier Fairchild DHC8 app dep SF34 Saab Fairchild SF 340 SF340 app dep SB20 Saab 2000 HS748A app dep

2 91.8 93.4-0.2-0.2 C500 Cessna 500 Citation 1 CNA500 app dep 05 23 85.2 88.9 85.5 86.4-0.3 2.5 DH8C De Havilland Canada DHC 8-3008 Dash 8 DHC830 app dep 05 23 91.0 85.2 82.7 78.0 8.3 7.

18 18 AIRCRAFT TYPE SUBSTITUTION IN THE DATA-BASE ICAO NAME AT72 D328 SB20 SUBSTITUTION ICAO NAME CVLT E120 SF34 AIRCRAFT CONVAIR CV580 EMBRAER EMB-120 BRASILIA SAAB FAIRCHILD SF340 SAAB 340 SUBSTITUTION SUGGESTED BY INM ICAO NAME HS748A DHC8 HS748A MOV EME NT SEL MEASURED- PREDICTED db(a) INM SUBS. ALT. SUBS. APP DEP APP DEP APP DEP

SUBSTITUTION SUGGESTED BY INM ICAO NAME HS748A DHC8 HS748A MOV EME NT SEL MEASURED- PREDICTED

19 19 VALIDATION OF NUMERICAL PREDICTIONS BIG AND MEDIUM AIRPORTS SMALL AIRPORTS BIG TRAFFIC ( > 50 MOVEMENTS PER DAY AND > 10 AIRCRAFT TYPES) SMALL TRAFFIC ( 50 MOVEMENTS PER DAY AND 10 AIRCRAFT TYPES) RADAR TRACKS MANY FLIGHT PROCEDURES MEASUREMENTS IN MANY SITES CONTINUOUS MONITORING LIST OF MOVEMENTS FEW FLIGHT PROCEDURES MEASUREMENTS IN FEW SITES MONITORING IN TERMS

AIRCRAFT TYPES) RADAR TRACKS MANY FLIGHT PROCEDURES MEASUREMENTS IN MANY SITES CONTINUOUS

20 CONCLUSIONS 20 AN INTEGRATED APPROACH IS REQUIRED AND MUST BE APPLIED SYSTEMATICALLY NOISE MEASUREMENTS NUMERICAL MODELS REDUCTION OF AIRPORT NOISE IS A GLOCAL ISSUE

21 THANK YOU FOR YOUR KIND ATTENTION 21

PRODUCT DATA. Flight Tracking Software Type 7804. Flight Tracking Software Type 7804

PRODUCT DATA. Flight Tracking Software Type 7804. Flight Tracking Software Type 7804 PRODUCT DATA Flight Tracking Software Type 7804 Flight Tracking Software Type 7804 enables the noise monitoring system to correlate aircraft movements with noise events recorded by Brüel & Kjær s range