基于GIS的高架道路交通噪声环评可视化

GIS-Based EIA Visualization of Elevated Road Traffic Noise

针对基于地理信息系统(GIS)的评价区域交通噪声环评可视化问题,引入了基于切割单元法的评价区域网格生成算法,分别提出了基于道路中心线段集的评价区域边界生成方法和基于声照区的网格自适应加密与稀疏算法,实现了复杂评价区域内非结构化网格的生成。在此基础上提出了适应于区域计算的等效声级计算模型,实现了环评计算结果的可视化显示。通过一个高架高速公路的实例,验证了该方法的准确性与有效性。

Focus on the visualization of GIS-based evaluation area traffic noise environmental impact assessment （EIA）, the boundary lines generating algorithm followed on the centre line of the road is presented. A method for the Cartesian grids generation with sound area self-adaptive grids refinement algorithm is provided to the complex evaluation area for the unstructured grids generation. Based on the unstructured grids, the equivalent sound level EIA model forevaluation areais proposed and the visualization of the EIA calculation is achieved. Through the visualization and analysis of an elevated highway example, the accuracy and efficiency of the proposed methods are confirmed.