Geoportal  

 

Berlin Environmental Atlas

07.05 Strategic Noise Maps (Edition 2008)

map view Text in Deutsch verfuegbar content    back forward

Calculation Model

The input data is prepared and combined in a 3D calculation model of the IMMI 6.1 software.

Obstructions

Obstructions, such as terrain edges, buildings and noise insulation facilities, were taken into account with the parameters described in the input data (position, altitude, reflection property, and the like). The basic model formed from the terrain and obstructions remained as it was for the calculation of all noise types.

Determination of Reception Points

At residential buildings, hospitals and schools, the position of reception points was determined according to the "Vorläufige Berechnungsmethode zur Ermittlung der Belastetenzahlen durch Umgebungslärm" (VBEB) ("preliminary calculation method for determining the exposure figures caused by environmental noise"). The number of inhabitants in residential buildings was distributed across the reception points of the respective residential buildings in equal shares.

Plausibility Check

The plausibility check consists of a visual check of 3D views of the calculation model and numerous automatic plausibility queries.

Calculation Parameters

Mappings within the scope of the Environmental Noise Directive cannot be achieved in economic calculation times if the applicable calculation rules are to be followed completely and strictly. For that reason, calculation parameters were determined in a simplified manner (minimum level distance = 25 dB(A); range of reflection surfaces limited to 200 m), essentially resulting in a neglection of irrelevant immission effects at certain reception points. As tested and certified, the accuracy requirements for the noise mapping calculation results were met and complied with a total accuracy of 2 dB(A).

Calculation Method

Road Traffic

VBUS ("preliminary calculation method for environmental noise at roads") was used for acoustic calculations of the strategic noise maps (cf. 34th BImSchV, Para. 5, Section 1). The noise indices LDEN(weighted 24-h mean value) and LNight were calculated with a step size of 10 m x 10 m at a reception point height of 4 m above the ground.
The number of persons exposed in their dwellings, of schools and hospitals was determined according to (VBEB) ("Vorläufige Berechnungsmethode zur Ermittlung der Belastetenzahlen durch Umgebungslärm" or "preliminary calculation method for determining the exposure figures caused by environmental noise").
The corrections for multiple reflections were determined and considered according to the specifications made in VBUS ("preliminary calculation method for environmental noise at roads"). Separate corrections for traffic lights are not allowed.

Streetcar and Subway Traffic

VBUSch ("Vorläufige Berechnungsmethode für den Umgebungslärm an Schienenwegen" or "preliminary calculation method for environmental noise at railways") and VBEB (cf. 34th BImSchV, Para. 5, Section 1) were used for acoustic calculation of the strategic noise maps as well as the persons exposed in their dwellings, schools and hospitals. The noise indices LDEN and LNight were calculated with a step size of 10 m x 10 m at a reception point height of 4 m above the ground.

Commercial Plants

VBUI("Vorläufige Berechnungsmethode für den Umgebungslärm durch Industrie und Gewerbe" or "preliminary calculation method for environmental noise caused by industrial and commercial plants") and VBEB were used for acoustic calculation of the strategic noise maps as well as the persons exposed in their dwellings, schools and hospitals. The noise indices LDEN and LNight were calculated with a step size of 10 m x 10 m at a reception point height of 4 m above the ground.

Air Traffic

(VBUF-DES) ("Vorläufige Berechnungsmethode für den Umgebungslärm an Flugplätzen - Datenerfassungssystem" or "preliminary calculation method for environmental noise at airports - data acquisition system") and (VBUF-AzB) ("Vorläufige Berechnungsmethode für den Umgebungslärm an Flugplätzen - Anleitung zur Berechung" or "preliminary calculation method for environmental noise at airports - calculation instructions") as well as VBEB (cf. 34th BImSchV, Para. 5, Section 1) were used for acoustic calculation of the strategic noise maps as well as the persons exposed in their dwellings, schools and hospitals.

Railway Traffic

VBUSch ("Vorläufige Berechnungsmethode für den Umgebungslärm an Schienenwegen" or "preliminary calculation method for environmental noise at railways") and VBEB (cf. 34th BImSchV, Para. 5, Section 1) were used for acoustic calculation of the strategic noise maps as well as the persons exposed in their dwellings, schools and hospitals. The noise indices LDEN and LNight were calculated with a step size of 10 m x 10 m at a reception point height of 4 m above the ground. According to VBUSch, the rail bonus (deduction of 5 dB because of the lower disturbing effect of railway traffic) provided in the National Calculation Provision for Rail Traffic Noise ("nationale Berechnungsvorschrift für Schienenverkehrslärm" SCHALL 03 is not assigned.

Using the Data Display

The various subject maps herewith made available to the public represent the noise situation in relation to areas in a classified form, as provided in the Environmental Noise Directive. What is more, they also provide the possibility of polling factual data: maps 07.05.1 to 07.05.10 display the individual grid values forming the basis of the classification and, for road traffic noise, additional background information about the principal road network registered. Since the grid used for representation in these maps is a 10 m x 10 m grid, the individual statements are not suited for precise evaluation of buildings. For that reason, map 07.05.11 (facade levels at residential buildings within the exposure range of main noise sources) provides a complete overview of the reception points used on the facades of residential buildings, including the immission levels calculated.

map view Text in Deutsch verfuegbar content    back forward

umweltatlas_logo_klein