IMMIS^luft

IMMIS^luft is a Screening model for the evaluation of air pollution in city streets. IMMIS^luft models traffic induced emissions and concentrations in city street canyons (additional load). It is based on the CPB model for street canyons and a box model for open building structures

Pollutants

IMMISluft calculates annual values and 98%-percentiles of CO, NO_X, NO, NO₂, SO₂, Partikel, PM₁₀, PM_2.5, Ruß, Benzol and more.

EU directives characteristics

• statistical characteristics of NO₂ derived from NO_x

• exceeding probability of hourly limit value of NO₂

• number of days with a daily PM₁₀ mean value above 35 µg/m³

• 90.4%-percentile of PM₁₀ daily mean value

• highest sliding 8-hours mean value of CO

Basic data of air pollution modelling

• traffic data

• background concentration e. g. using IMMIS^net

• meteorological data

• geometry data of street canyon

• start and end coordinates of street section

Emission modelling

• IMMIS^em modelling kernel based on Handbook emission factors (HBEFA) and VDI 3782 Sheet 7

• import of emission data

Features

• scaling of wind speed

• customized meteorologies

• several methods for deriving NO₂-characteristics

Interfaces

• Input data and results are stored in a Dbase file

• Integration in GIS (ArcGIS® )

• Shape file und MIF export

VISUM (traffic modelling)