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| 街谷建筑高度非均匀性对空气污染的影响研究 |
| Effect of Building Height Nonuniformity on Air Pollution in Urban Street Canyons |
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| DOI： |
| 中文关键词: 建筑高度 非均匀性 ENVI met模型 街谷 空气污染 风速 |
| 英文关键词: Building height Nonuniformity ENVI met model Street canyon Air pollution Wind speed |
| 基金项目:国家自然科学基金资助项目(41571482)；国家重点研发计划基金资助项目(2016YFC0502804)；城市与区域生态国家重点实验室基金资助项目(SKLURE 2017-1-1) |
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| 中文摘要: |
| 以ENVI met为数值模拟平台，采用人行道和墙面污染物浓度为评价指标，在保持街谷建筑平均高度不变（建筑面积不变）的前提下，设置27个情景开展街谷建筑高度非均匀性对空气污染影响的对比模拟研究。结果发现：在不同风速条件下街谷建筑高度的非均匀性对街谷污染均具有较大的减轻作用。非均匀程度越大，污染强度减轻作用越大；错列式非均匀方式对污染的减轻作用大于行列式；非均匀性对街谷墙面污染的减轻作用大于人行道污染减轻作用。 |
| 英文摘要: |
| 27 designed cases were studied on the effect of building height nonuniformity on air pollution in street canyons by using ENVI met numerical simulation platform, taking the pollutant concentration in sidewalk and wall as the evaluation indexes, and in the condition of unchanged average building height and the area of structure. The results showed that building height nonuniformity had a great effect on air pollution reducing in street canyons at different wind speeds. The greater the nonuniformity, the greater the reduction effect. Stagger nonuniform model had greater effect of pollution reducing than the aligned model. And the reducing effect on wall was greater than that on sidewalk. |
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