Gallery of the Hall will be built in Beijing wind shadows expert: blow into the surrounding province | haze spread | |-corridor _ news
Original title: Beijing will build the ventilation corridor "drafts"
Reporter Kong Xiangxin Li Xu Yue Fang Wenyu Jun Hee Lee
In the Beijing City Planning Commission under the aegis of Beijing's Center City corridor ventilation system research team set up, plan 5 ventilation corridor width of 500 meters above sea level, as well as multiple width of 80 meters above the secondary ventilation corridors in order to improve the overall ventilation built-up area, promote internal and external heat exchange and pollutant dispersion in urban area. Now, the team is through the data calculation method, path, seeking excellence in science planning levels and ventilation corridor, in Center City to form a perfect ventilation corridors of network systems.
Air corridor into changes in town planning highlights
"The national development and Reform Commission and Ministry of housing issued jointly by the urban adaptation to climate change action programme has explicitly called" through the urban ventilation corridor, increase the mobility of air ". Deputy Director of the Beijing Municipal Planning Commission, Wang Fei said Beijing was using the great potential for ventilation zones, improving ventilation corridors in the Center, set up by the Beijing Municipal city planning and Design Institute, Beijing Climate Center and Beijing love Dallas Center City corridor ventilation system composed of information technology research team.
According to reports, Beijing is planning a 5 ventilation corridor width of 500 meters above sea level, as well as a number of secondary air corridor. "We are now planning more mini three-level corridor. "The Deputy Director of the Research Office of the Beijing Institute of city planning and design planning, Mr Frederick Ho, said," in the future, ventilation corridors will connect at all levels, forming an integrated ventilation networking. ”
Reporters learned this 5 level ventilation corridor the main component is the central city in Beijing more than parks and plenty of green spaces. According to introduced, Northwest of corridor a, including Kunming Lake, and Kun Tamagawa, zizhu hospital Park, and Zoo, yuyuantan; West of corridor II of beginning set in botanical garden; along in the axis area of corridor three, including Taiping country park, by East small mouth forest park, and Olin Olympic Park, and Houhai, and North Sea,; Center City East of corridor four, including qinghe country park, towards to forest park, and Chaoyang Park,; Center City East of corridor five, main for East five ring and the sides green with.
"Construction of corridor ventilation system main objective is to improve urban air thermal environment in densely populated areas, ease the heat island effect in the Center. 2012 monitoring data shows that when six heat island of Beijing City area have accounted for the total area of the region of 77%. "This plan selecting conditional regions build ' South transparent ' ventilation corridor, layman's terms, it is equivalent to ' drafts '. "Mr Frederick Ho, said that air corridor is not to" wind "but let cool air to flow more smoothly on the outskirts of the city, and hot air in the urban areas," change ", so as to effectively reduce the temperature in the urban area.
Reporters learned that ventilation corridor planning assumptions made many years ago, and local search, but the news is the corridor ventilation systems explicitly for the first time, will also serve as one of the biggest attractions clearly reflected in recent changes in urban planning.
Ventilation corridors built to control as the primary
Beijing ventilation corridor construction news release, public "whether ventilation corridor will have a new round of demolition" and "adversely impact on the residents living along" is particularly concerned about such issues. In this regard, the Deputy Director of the Beijing Municipal Planning Commission, Wang Fei said: "at present, ventilation corridors in Beijing is still in the planning stage, entered the implementation stage is mainly based on the current situation to tighten control of the future increases. ”
Reporters learned in Beijing city planning 5-level ventilation corridor, as well as a number of secondary air corridor, there are many "stuck points". Height is higher, denser buildings fall, become a bottleneck in the flow of the air district. For example, on corridor IV in the Shi Li River area has a large number of wholesale markets and temporary buildings. Shi Li River area with the promotion of work stress of non-function in the capital gradually released back.
Vice President of the China Academy of urban planning and design of Wang believes that improvement of urban atmospheric environment is complex, varies with the height of air flow condition, each region will have a lot of small flow vortex will directly influence the effect of ventilation corridors. Over the years carried out a massive high-density high-rise building development in Beijing, the future is not only to reduce the intensity of development, but also to strengthen construction of green spaces, water recovery.
"Ventilation corridor planning, first of all, is to protect and prevent the encroachment of urban construction of the existing ventilation corridors, protect the air flow will not continue to deteriorate. "Mr Frederick Ho, said that demolition and larger ventilation corridors construction are not, but the process of urban renewal, gradually optimized. This consideration factors is a city-building process.
"Blown the haze" How do I
For the planning and construction of the Beijing air corridor, people have very high expectations for blown smog, while public doubts about the haze will be blowing around.
"The haze blown into neighbouring provinces concerns need not. "The project team experts say air flow away of pollutants in addition to centers around the city's proliferation of open areas, will spread out over. Is a process of gradual dilution of pollutants, will not impact on the surrounding provinces.
In fact, ventilation corridors solving problems within cities. Project team experts say poor air flow in the Center, leading to stasis of life, production of air pollutants. Beijing Centre for planning the ventilation corridor is designed to allow urban and suburban districts and counties better "breathing".
According to reports, the researchers of the Western Corridor project group Kun Tamagawa area measured in three points, results showed that ventilation corridor to reduce heat island effects, promote air circulation a certain effect, especially in the peak effects are more obvious. "Whether it's practical, or computer simulation results suggest that ventilation corridors can play a role. "Mr Frederick Ho, said.
Responsible editor: Wang Hao
Article keywords:Fog dispersal corridors
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北京将建廊道引穿堂风吹霾 专家：吹不到周边省|雾霾|扩散|廊道_新闻资讯
原标题：北京将构建通风廊道引来“穿堂风”
记者 孔祥鑫 李萌 徐岳 方问禹 李俊义
在北京市规划委的统筹下，北京市成立中心城通风廊道系统研究团队，规划了5条宽度500米以上的一级通风廊道，以及多条宽度80米以上的二级通风廊道，以提升建成区整体空气流通性，促进城区内外热交换和污染物扩散。如今，该研究团队正通过数据计算、路径寻优等科学方法规划三级通风廊道，以在中心城形成一套完善的通风廊道网络系统。
通风廊道成城市规划修改亮点
“国家发改委和住建部联合印发的《城市适应气候变化行动方案》已明确要求“打通城市通风廊道，增加城市的空气流动性”。北京市规划委副主任王飞表示，北京市正在利用通风潜力较大地带，完善中心城区通风廊道系统，为此成立由北京市城市规划设计研究院、北京市气候中心以及北京爱特拉斯信息科技有限公司组成的中心城通风廊道系统研究团队。
据介绍，北京市目前规划了5条宽度500米以上的一级通风廊道，以及多条二级通风廊道。“我们现在正在规划设计更加微型的三级廊道。”北京市城市规划设计研究院规划研究室副主任何永说，“未来，各级通风廊道将相互连接，形成一个整体的通风网络。”
记者了解到，这5条一级通风廊道主要组成部分是北京市中心城区多座公园和大片绿地。据介绍，西北部的廊道一，包括昆明湖、昆玉河，紫竹院公园、动物园，玉渊潭；西部的廊道二的起点设在植物园；沿中轴线地区的廊道三，包括太平郊野公园，经东小口森林公园、奥林匹克公园，以及后海、北海等；中心城东部的廊道四，包括清河郊野公园，朝来森林公园、朝阳公园等；中心城东部的廊道五，主要为东五环及两侧绿化带。
“通风廊道系统构建的主要目的是改善城市密集区的风热环境，缓解中心城区的热岛效应。2012年监测数据显示，严重时，北京市城六区热岛面积已占到该区域总面积的77％。“这次规划选择有条件的地区构建‘南北通透’的通风廊道，通俗地说，就相当于‘穿堂风’。”何永说，通风廊道并不是要“造风”，而是让郊区的冷空气带更畅通地流动到市区，并把市区的热空气“换”走，从而有效降低市区温度。
记者了解到，通风廊道的规划设想在很多年前就提出过，并进行了局部的探索，但此次消息发布是通风廊道系统构建第一次明确提出，也将作为最大的亮点之一明确体现在最近正在修改的城市规划中。
通风廊道构建将以控制为主
北京通风廊道构建的消息发布后，市民百姓对“通风廊道建设是否会产生新一轮大拆大建”“沿线居民生活是否会受到不利影响”等问题尤为关注。对此，北京市规划委副主任王飞表示：“目前，北京的通风廊道还处于规划阶段，未来进入实施阶段后主要是基于现状严控增量。”
记者了解到，在北京市规划的5条一级通风廊道，以及多条二级通风廊道中，的确存在诸多“堵点”。不少高度较高、密度较大的建筑群落，成为空气流动的瓶颈区。例如，位于廊道四中的十里河地区拥有大量的批发市场以及临时建筑。十里河地区将随着疏解非首都功能等工作的推进逐步腾退。
中国城市规划设计研究院副院长王凯认为，城市大气环境的改善十分复杂，空气流动状况随着高度变化，各区域还会有很多的小的气流涡旋，都会直接影响到通风廊道的效果。这些年北京进行了大量的高密度高层建筑开发，未来不仅仅是要降低开发强度，还要配合加强绿地、水面的恢复建设。
“规划通风廊道，首先就是要保护，防止现有的通风廊道被城市建设所侵占，保护空气流动状况不会继续变差。”何永说，通风廊道的建设并非要大拆大建，而是结合城市发展更新的进程，逐步进行优化。这是一个城市建设多方面因素综合考虑的过程。
“吹霾”如何实现
对于北京规划建设的通风廊道，百姓对吹散雾霾寄予了很高期待，与此同时，舆论也对雾霾会否吹响周边产生疑虑。
“雾霾吹到周边省份的担忧大可不必。”项目研究团队专家表示，空气流动带走的污染物除了向中心城周边的开阔地带扩散，也将向上空扩散。污染物是一个逐渐稀释的过程，不会对周边省份带来影响。
实际上，通风廊道解决的是城市内部的问题。项目研究团队专家表示，中心城区空气流动性变差，导致生活、生产的空气污染物淤滞。而北京规划的通风廊道主要是让中心城区与远郊区县之间更好地“换气”。
据介绍，项目组研究人员选取了西部廊道的昆玉河地区三个点进行实测，结果显示，通风廊道对降低局地热岛效应、促进空气流通有一定效果，尤其是在峰值时效果更加明显。“无论是实际检测，还是计算机模拟计算的结果都表明通风廊道可以发挥一定的作用。”何永说。
责任编辑：王浩成
文章关键词： 雾霾 扩散 廊道
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