南通市降尘时空分布特征及影响因素

对2004年—2009年南通市降尘监测数据进行分析,结果表明,市区降尘污染较轻,年均值全部达标,在6年间呈波状变化态势;从各月分布来看,3—7月降尘污染较为严重;在各功能区中,受降尘污染程度从大到小依次为:居民区>工业区>商业交通区>文教区。提出,应继续推进城区企业工艺改造升级,加快燃煤锅炉淘汰;施工(运输)期间对易产生扬尘的建筑材料应采取密闭存储、设置围挡等有效措施并保证建筑垃圾及时清运、施工车辆及道路及时清扫冲洗;加大城市的绿化建设和道路的硬化建设,尽量避免道路开挖。

Analysis on Character of Temporal-Spatial Distribution and Effect Factors of Dustfall in Nantong

The monitoring data of dust fall in Nantong was analyzed during the year from 2004 to 2009.The results indicated annual average values of dust fall in urban area reached the standard of air quality and showed a wave trend in the six years.The monthly values were high from March to July and showed dust fall pollution level as follow as residential areaindustrial zonecommercial and traffic areacultural and educational area.Some suggestion was made for improvement environment such as to upgrade urban enterprise process,to leave the coal boiler off,to take dust airtight storage for building materials at construction and transportation,to remove waste in time and wash construction vehicles and road promptly,to increase the city＇s green area and road pavement as well as try to avoid road excavation.