heinrich a. metzen 1 , igor dormuth 2 1 datakustik gmbh, gewerbering 5, d-86926 greifenberg

Heinrich A. MetzenHeinrich A. Metzen11, Igor Dormuth, Igor Dormuth22

11Datakustik GmbH, Gewerbering 5, D-86926 GreifenbergDatakustik GmbH, Gewerbering 5, D-86926 Greifenberg22ACCON GmbH, Gewerbering 5, D-86926 GreifenbergACCON GmbH, Gewerbering 5, D-86926 Greifenberg

Noise Mapping San Juan - Puerto RicoNoise Mapping San Juan - Puerto Rico

Generation of a Digital Town ModelGeneration of a Digital Town Model

buildings

terrain

sources(roads)

Digital Town Model

Input Data - Road NetworkInput Data - Road Network

roadsroadscoast linecoast linemunicipal bordermunicipal border

total road length: 280 kmtotal road length: 280 km

distribution of traffic AADT:distribution of traffic AADT:

AADT classe (veh/day) road lengthfrom to (km)

1000 2.81000 5000 21.05000 10000 5.710000 20000 70.420000 50000 113.650000 66.9

Distribution of Traffic LoadDistribution of Traffic Load

coast linecoast linemunicipal bordermunicipal border

road sections coloured based road sections coloured based on their AADT-dataon their AADT-data

legend:legend:

Input Data - BuildingsInput Data - Buildings

buildingsbuildingscoast linecoast linemunicipal bordermunicipal border

total number of buildings within San total number of buildings within San Juan municipal border: 111562Juan municipal border: 111562

building height in classes:building height in classes:

building height (m) No. offrom to buildings

3 184423 4 438704 6 246726 8 177368 10 344210 20 269720 50 60250 92

Distribution of Building HeightsDistribution of Building Heights

coast linecoast linemunicipal bordermunicipal border

legend:legend:

Distribution of Building HeightsDistribution of Building Heights- San Juan town centre -- San Juan town centre -

coast linecoast linemunicipal bordermunicipal border

legend:legend:

Input Data - Terrain ModelInput Data - Terrain Model

modifications due:modifications due:

- absolute heights corrected- absolute heights corrected

- arbitrary splines deleted- arbitrary splines deleted

- coast line at h=0 m was missing: - coast line at h=0 m was missing: coast line modelled from contour coast line modelled from contour line at 1 m height by a parallel line line at 1 m height by a parallel line at 5 m distanceat 5 m distance

San Juan - Digital Town ModelSan Juan - Digital Town Modeltotal town area: 128 km²

San Juan - 3D-ViewsSan Juan - 3D-Views

San Juan - 3D-ViewsSan Juan - 3D-Views

Calculation Standards/GuidelinesCalculation Standards/Guidelines

Road Noise: German Guideline RLS-90, edition 1990

RLS-90 calculates:

• 1st reflection order

• two outermost tracks separately

• no lateral diffraction

• no attenuation due to foliage

CadnaA - Configurations of CalculationCadnaA - Configurations of Calculation

• 1st reflection order

• grid interpolation 9*9

• max. search radius for sources: 2500 m

• no projection of line & area sources

• ground absorption included (porous ground)

• evaluation parameters: Lday (6 am - 10 pm)Lnight (10 pm - 6 am)

San Juan - Daytime GridSan Juan - Daytime Grid

SPL (dB(A)) subjected areafrom to day (km²)

50 23.350 55 26.755 60 28.960 65 20.965 70 11.370 75 6.475 8.3

San Juan - Nighttime GridSan Juan - Nighttime Grid

SPL (dB(A)) subjected areafrom to night (km²)

50 64.650 55 25.555 60 1660 65 8.565 70 5.170 75 4.275 1.9

San Juan - Comparison Day/Night GridsSan Juan - Comparison Day/Night Grids

Day Night

San Juan - 3D-Views incl. GridSan Juan - 3D-Views incl. Grid

San Juan - 3D-Views incl. GridSan Juan - 3D-Views incl. Grid