Noise in agglomerations — Railroads — Level grid LDEN — mapping 2022

The data include the calculation results of the 2022 environmental noise mapping in the agglomerations in Bavaria. These are all cities in Bavaria with more than 100,000 inhabitants, i.e. Munich, Nuremberg, Augsburg, Fürth, Erlangen, Würzburg, Regensburg and Ingolstadt. In each agglomeration, noise was covered by road transport, industrial and commercial facilities in accordance with Directive 2010/75/EU of 24.11.2010 on Integrated Pollution Prevention and Control (IED Directive) and, where available, by tram and above-ground underground transport. Noise calculations are carried out in accordance with the “Calculation method for ambient noise from near-ground sources (roads, rail, industry and commerce) (BUB)”. The noise indices LDEN and LNight in dB(A) are used as a measure of general harassment or as a measure of sleep disturbance. The LDEN level is an emission level averaged over 24 hours, calculated from the levels Lday, Levening and LNight for the assessment times day (6:00-18:00), evening (18:00-22:00) and night (22:00-6:00). Due to weight factors of 5 dB(A) for the four-hour evening time and 10 dB(A) for the eight-hour night time, the increased noise sensitivity during these times is taken into account. The layer represents the noise pollution on tramways and above-ground metro lines in the agglomeration, expressed by the noise index LDEN in accordance with the EC Environmental Noise Directive.本数据集包含巴伐利亚州（Bavaria）2022年城市群环境噪声制图计算结果。上述城市群均为巴伐利亚州常住人口超10万的城市，包括慕尼黑（Munich）、纽伦堡（Nuremberg）、奥格斯堡（Augsburg）、菲尔特（Fürth）、埃尔朗根（Erlangen）、维尔茨堡（Würzburg）、雷根斯堡（Regensburg）以及因戈尔施塔特（Ingolstadt）。 各城市群的噪声核算覆盖道路交通、工商设施产生的噪声，核算依据为2010年11月24日发布的《综合污染预防与控制指令（Directive 2010/75/EU）》（简称IED指令）；若条件允许，同时纳入有轨电车及地面地铁线路的噪声数据。噪声计算严格遵循《近地面源（道路、铁路、工商场所）环境噪声计算方法（BUB）》执行。 本数据集采用以分贝(A)（dB(A)）计量的噪声指数昼夜等效声级（LDEN）与夜间等效声级（LNight），分别作为通用噪声扰民程度与睡眠干扰程度的评价指标。其中昼夜等效声级为24小时平均噪声排放水平，由昼间（6:00-18:00）、傍晚（18:00-22:00）以及夜间（22:00-6:00）三个评估时段的Lday、Levening及LNight指数计算得到。鉴于傍晚4小时时段与夜间8小时时段分别设置了5dB(A)与10dB(A)的加权系数，以此体现该时段内人体对噪声敏感度提升的实际情况。 本数据图层表征城市群内有轨电车线路及地面地铁线路的噪声污染状况，以符合欧盟环境噪声指令的昼夜等效声级进行表征。