Emission and impact forecasts
We offer problem-oriented testing for the immission protection assessment of your planning. Müller-BBM provides the basis for evaluating different scenarios with the help of immissions forecasts. For this purpose, we calculate the transport emissions and the immissions caused by it, or for example, the number of residents affected by traffic noise or air pollutants. We are also pleased to help in the design of appropriate protection measures.
Our services in the following areas are:
We usually determine traffic-related emissions, on the basis of traffic data and the "HBEFA Handbook Emission Factors for Road Transport" database according to VDI 3782 part 7 " determination of air impurities in vehicle emissions". The transport of pollutants with the air flow is calculated with different micro-and mesoscale flow and dispersion models. The selection of the models is determined by the boundary conditions and the topography in the study area.
The screening methods or PROKAS IMMISluft are used for simple estimates of emissions in residential areas. Detailed calculations of wind flow affected by buildings or noise barriers for example, and dispersion behaviour are possible with the microscale forecast model MISKAM. To account for the effects of terrain features (e.g. narrow valleys), we use LASAT or METRAS models.
So-called cold-air flows (downslope winds) can arise during low wind, cloudless weather; these may be calculated using the prognostic simulation model KLAM_21 developed by the German Weather Service and integrated in the dispersion calculations with LASAT. For large area slopes, it may be necessary to use the mesoscale forecast wind field model METRAS.
The nitrogen inputs in the surface areas of fauna and flora habitats (FFH) are derived from simulations obtained with LASAT deposits testing (dry and wet) of nitrogen-containing pollutants (nitrogen oxides and ammonia) on the ground.
Müller-BBM handles the tests in accordance with the principle guideline VDI 3783 Part 14 "Quality control concerning impact forecast - Vehicle-related impacts" and in compliance with all applicable regulations and guidelines. All methods and models are accepted in court a court of law. In this way, we guarantee legally compliant reports for your project planning.
Example of urban emissions calculated with MISKAM
The construction or substantial modification of roads and railways as well as facilities for air traffic or similar issues in urban land development or noise abatement planning must, in accordance with the legal requirements, initially forecast and assess noise pollution.
To this end, Müller-BBM carries out extensive simulations using three-dimensional calculation models. All relevant noise sources and noise barriers and buildings are entered into a terrain model, the calculation of noise exposure is based on the established rules and regulations: of road traffic noise according to RLS-90, for rail traffic noise, according to Schall 03, for aircraft noise according to the procedure of the Committee of Competent Authorities (CCA). As part of the noise mapping and noise abatement plan to the EU Environmental Noise Directive, the accurate data entry of the population is possible.
The calculated rating levels are then compared with the relevant directives and limit values. the corresponding questions the number of those affected by a particular rating level can also be determined.
In this way, the results for various noise control measures can be quickly compared and the acoustically effective measure can be selected.
Vibrations from rail or road traffic in nearby buildings, causing component vibrations can lead to the disturbance of residents and users under certain circumstances.
Müller-BBM has over 30 years in the field of vibration measurement and forecasting work. We investigate vibration emissions from rail traffic in existing and planned buildings, and assess them with regard to the impact on people in buildings in accordance with DIN 41 502 and to structures according to DIN 41503.
We conduct site analyses and risk assessments in the run up to building construction in vibration-prone sites. When observed or predicted adverse impacts, we advise builders and planners on the vibration-optimised layout of components. The design and implementation of vibration-reducing measures to protect the building and to ensure its usability is also part of our range of services.