污染气体扩散效应的城市景观环境规划设计方案研究

Planning of Urban Landscape Environment Considering Effect of Pollutant Gas Diffusion

为降低城市污染气体浓度,维护城市生活环境质量,提出考虑污染气体扩散效应的城市景观环境规划设计方案。基于实际生活情况分析城市污染气体,分别在点源、线源、面源三个角度搭建污染气体扩散模型,获取污染气体扩散特征,通过自然景观与人工景观两方面规划城市景观环境,优化植物树种、计算植物吸收污染气体能力与增加城市绿地面积;选取建筑形态、确定建筑间距以及布局,实现城市景观环境的规划设计。测试结果表明提出方案在风力等级为3级与5级下,污染气体浓度范围均低于安全浓度30.15 mg/m^(3)。

In order to reduce the concentration of pollutant gases in the city and maintain the quality of urban living environment,the urban landscape environmental planning and design plan was proposed by considering the diffusion effect of pollutant gases.This study analyzes urban pollution gases based on actual living conditions,builds pollution gas diffusion models from three perspectives of point source,line source,and non-point source.It obtains the characteristics of pollution gas diffusion and plans the urban landscape environment through both natural and artificial landscapes to optimize plant and tree species.The ability of plants to absorb pollutant gas is calculated in order to increase the area of urban green space.Select building forms,the spacing and layout of buildings were determined to realize the planning and design of urban landscape environment.The test results show that the proposed scheme has a range of pollutant gas concentrations lower than the safe concentration of 30.15 mg/m^(3) under wind power levels 3 and 5.