Statistical Method for an Assessment of Actions against Noise and Air Pollution in Order to compare the total Improvement in an Investigation Area

摘要

In accordance with the German regulation VBEB, LIMA provides intuitive methods for the evaluation of different planned actions. Noise and air pollution maps used alone are lacking in that they do not show any statistical evaluation of the quality of the actions. Actually, while the reduction of immissions is relevant, the reduction in numbers of exposed inhabitants after vs before any action is the most important evaluation criteria. In the following, we define the adapted statistical method for air pollution impact evaluation. All facades longer than 5m can be broken down into sub facades. For each part of the facade, a receiver point is calculated. LIMA determines the positions of the receiver points automatically. For noise mapping, we recommend 5 m or 10 m grid size, for air pollution mapping grid size can be fixed from 2 m up to 10 m. From the regular grid results, LIMA fetches by a sophisticated interpolation nicely fitted proper values to the necessary receiver points; this method is proved since years. The user is free to decide whether using the exact number of inhabitants for each building or using a statistical distribution of inhabitants proportional to volume of a building derived from the whole number of inhabitants in the investigation area.