 FOUR RUNWAYS MAPS |
NOISE MAPS FOR 4 RUNWAYS AT STANSTED
(THE THREAT STILL EXISTS)
Noise Map for 4 Runways in 2030
using World
Health Organisation Guidelines
|
|
The above map shows the projected noise contours in 2030 if 4 runways were to be built. The DfT estimate of the noise annoyance area, as contained in the Consultation Documents, is 228 square kilometres/88 square miles. Our 50 dBA Leq figure, equating to the World Health Organisation's recommendations, is 619 square kilometres/239 square miles, over 2½ times the size.
Click here to download a larger version of the above map
|
Noise Map for 4 Runways in 2030
with Aircraft landing and taking off in the North Easterly Direction only using World Health Organisation Guidelines
|
| |
This map results from separating the two modes of operation at Stansted (ie north easterly and south westerly) into two maps, based on the maximum 4 runways year 2030 scenario. The map shows the effects on the days when departing aircraft would be taking off towards the north east, and arriving aircraft approaching the runway from the south west. Over the past 20 years this has been, on average, the direction of operation for approximately 24% of the year ie about 3-4 days in every fortnight, on average. However in 2001 the percentage was 29% and in 2002 it was 36%, which is an average of about 5 days per fortnight. The number of days in each direction is dependent on the prevailing winds, and some climate experts believe that the last two exceptional years may become the long term pattern for the future.
The days of north easterly operation do not come neatly packaged in averages of 3 or 4 or 5 days per fortnight. They can prevail for many days at a time. This is why, for instance, the Harlow area had such an exceptional long period of overflights from arrivals in August-September 2002.
Click here to download a larger version of the above map
|
Noise Map for 4 Runways in 2030
with Aircraft landing and taking off in the South Westerly Direction only using World Health Organisation Guidelines
|
| |
This map results from separating the two modes of operation at Stansted (ie north easterly and south westerly) into two maps, based on the maximum 4 runways year 2030 scenario. The map shows the effects on the days when departing aircraft would be taking off towards the south west, and arriving aircraft approaching the runway from the north east. Over the past 20 years this has been, on average, the direction of operation for approximately 76% of the year ie about 10 –11 days in every fortnight, on average. However in 2001 the percentage was 71% and in 2002 it was 64%, which is an average of about 9 days per fortnight. The number of days in each direction is dependent on the prevailing winds, and some climate experts believe that the last two exceptional years may become the long term pattern for the future.
The days of south westerly operation do not come neatly packaged in averages of 9 or 10 or 11 days per fortnight. They can prevail for many days at a time. This is why, for instance, some of the areas to the north of the airport had an exceptional long period of comparative respite in August-September 2002. Sadly though, one person's respite is another person's noise nuisance.
Click here to download a larger version of the above map
|
Noise Map for 4 Runways in 2030
with the Two Split Modes of Operation Recombined
|
|
The effects of using the traditional 'all-in-one' approach can be seen when this map is compared to Map 2. See, for instance, how the predicted effects of noise in the Braintree area are omitted in the traditional maps.
Click here to download a larger version of the above map
|
Link to full Background Information on the above Maps
Official Noise Contour Predictions
for Four Runways at Stansted
NOTE: The Leq. 16h contours on the above map are based on the government's data
and we believe that they greatly underestimate the extent of the likely noise problems
View a larger colour version
Official 54dBA (Leq. 16h) Noise Contour Prediction
for Four Runways at Stansted
NOTE: The 54dBA (Leq. 16h) zone on the above map is based on the government's data
and we believe that it underestimates the extent of this noise zone
View a larger colour version
Regional Noise Impact Predictions
for Four Runways at Stansted
NOTE: The 54dBA (Leq. 16h) zone on the above map is based on the government's data
and we believe that it underestimates the extent of this noise zone
View a larger colour version
Main Map Room
|
