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北京市某高层建筑高空电磁辐射环境影响分析 总被引:1,自引:0,他引:1
王璟 《环境监测管理与技术》2014,26(1):61-65
选取北京市某代表性高层居民楼顶平台作为高空电磁辐射环境水平监测点进行综合场强和选频监测,评价总体电磁辐射环境水平,并分析监测区域电磁辐射能量的来源。结果表明:该高空监测区域的电磁辐射环境总体水平低于国家规定的公众照射导出限值,但高于地面水平。监测区域主要受30 km 外的中波台影响,其次是9 km 外的中央电视塔。影响最大的是639 kHz频率的中波信号,占100 kHz~300 MHz总场强的95%以上,其次是1.28 MHz频率的中波信号。提出,开展敏感建筑物规划建设时,应考虑中波的传播特性和对环境的影响。 相似文献
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Qin QZ Chen Y Fu TT Ding L Han LL Li JC 《Environmental monitoring and assessment》2012,184(3):1533-1540
To understand electromagnetic radiation field strength and its influencing factors of certain 110-kV high-voltage lines in
one urban area of Chongqing by measuring 110-kV high-voltage line’s electromagnetic radiation level. According to the methodology
as determined by the National Hygienic Standards, we selected certain adjacent residential buildings, high-voltage lines along
a specific street and selected different distances around its vertical projection point as monitoring points. The levels of
electromagnetic radiations were measured respectively. In this investigation within the frequency of 5–1,000 Hz both the electric
field strength and magnetic field strength of each monitoring sites were lower than the public exposure standards as determined
by the International Commission on Non-Ionizing Radiation Protection. However, the electrical field strength on the roof adjacent
to the high-voltage lines was significantly higher than that as measured on the other floors in the same buildings (p < 0.05). The electromagnetic radiation measurements of different monitoring points, under the same high-voltage lines, showed
the location which is nearer the high-voltage line maintain a consistently higher level of radiation than the more distant
locations (p < 0.05). Electromagnetic radiation generated by high-voltage lines decreases proportionally to the distance from the lines.
The buildings can to some extent shield (or absorb) the electric fields generated by high-voltage lines nearby. The electromagnetic
radiation intensity near high-voltage lines may be mitigated or intensified by the manner in which the high-voltage lines
are set up, and it merits attention for the potential impact on human health. 相似文献
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为考核辐射环境监测质量,浙江省辐射环境监测站组织了2010年全省辐射环境监测网络环境电磁辐射测量比对。采用稳健Z比分数法评价测量数据的一致性。结果表明,射频综合场强测量比对中,9台仪器测量结果满意,1台仪器测量结果离群。工频电磁场测量比对中,有9台仪器测量结果满意,2台仪器测量结果离群。88%的测量值为满意结果,12%为离群结果,测量比对有效地发现了测量仪器存在的问题,保证监测工作结果的准确性。 相似文献
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周杨 《环境监测管理与技术》2007,19(3):46-48
依据<500 kV超高压送变电工程电磁辐射环境影响评价技术规范>(HJ/T 24-1998)中的预测模式对监测点周围地面1.5 m处工频电场进行了验证性监测,表明实际测定结果与理论计算结果基本吻合.通过对220 kV双回同相、双回逆相和单回线路下地面1.5 m、4.5 m、和7.5 m处工频电场变化趋势分析,预测了220 kV高压输电线产生的电磁辐射水平,以及不同房屋结构的防护距离.提出了220 kV高压输电线电磁辐射的防护措施. 相似文献
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浅议环保系统辐射环境监测网络现状及发展策略 总被引:1,自引:0,他引:1
简述了全国辐射环境监测网络现状以及国控点监测总体概况,指出了目前辐射环境监测网络存在的问题,提出应加强法规建设,理顺机制,大力发展监测队伍;统筹规划,优化资源配置,夯实监测能力;有效运行质量管理体系,加大培训力度;深化各类报告的编制出版工作,加强监测信息公开的发展策略。 相似文献
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南京市通讯辐射环境调查 总被引:1,自引:0,他引:1
通过对南京市区进行网格式布点监测,并重点监测典型区域和典型基站,采用基于MapInfo构建的电磁辐射环境评价系统进行现状评价。结果表明,南京市电磁辐射水平总体较低,处于安全水平,部分电磁辐射水平相对较高的区域主要受电视发射塔和广播电台的影响,是南京市电磁辐射环境保护和移动通信基站建设应关注的重点。 相似文献
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Clench-Aas J Bartonova A Bøhler T Grønskei KE Sivertsen B Larssen S 《Journal of environmental monitoring : JEM》1999,1(4):313-319
This paper presents an integrated exposure monitoring system, based on an expansion of existing air quality monitoring systems using dispersion modelling. The system allows: (1) identifying geographical areas whose inhabitants are most exposed to ambient pollution; (2) identifying how many people in an area are exposed to concentrations of pollution exceeding air quality guidelines; (3) describing the exposure of population subgroups (e.g. children); (4) planning pollution abatement measures and quantifying their effects; (5) establishing risk assessment and management programs, and (6) investigating the short- and long-term effects of both pollutants and pollution sources on public health. The effect of pollution is rarely very large and in order to discover it, exposure estimation must provide data that reflects both spatial and temporal variations. Estimates of pollution exposure are obtained using an integrated approach that combines results of measurements from monitoring programs with dispersion calculations. These values can serve as estimates for individual short-term or long-term exposure. The grouped data allows the expression of ambient pollution concentrations as the spatial distribution of estimates such as the mean or 98th percentile of such compounds as SO2, O3, NO2, PM10 and PM2.5. This integrated approach has been combined into a single software package, AirQUIS. 相似文献
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各类无线技术的发展和应用导致公众曝露于环境中的电磁场辐射的程度越来越高,由此引发的对人体健康风险的担忧促使诸多国家和组织开展了相关研究,并制定了电磁环境控制限值,电磁环境的空间分布也成为至关重要的基础数据。于2019年10—12月对北京市中心3个典型商区的电磁环境进行了测试,测试频段为10 MHz~8 GHz,属于射频范围。通过空间插值方法对测试数据进行处理,从而得到测试区域的射频电磁环境空间分布地图。对测试数据的进一步分析表明,测试区域的射频电磁环境水平主要分布在0.5~2.5 V/m,随空间距离变化较为剧烈,总体上符合《电磁环境控制限值》(GB 8702—2014)的要求。建议在城市发展过程中,对射频电磁环境进行持续、精细的监测。 相似文献
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对连云港移动通信基站电磁辐射环境进行现状调查与评价,将3个时段内移动基站电磁辐射监测数据进行统计分析和分区评价。结果表明,监测数据均能符合相应的环境标准,县域电磁环境辐射水平整体略低于城市区域,基站周边整体受电磁辐射影响程度随高度上升呈增加趋势,10 m~15 m高度处的综合场强平均峰值最高。 相似文献
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Environmental monitoring, modeling, and managing allow a better understanding of major processing and techniques for managing environmental changes. The pollution level has risen over time due to many factors such as a rise in population and the use of the vehicle, industrialization, and urbanization that have a direct impact on people ‘s health. Hence, in this paper, Artificial intelligence assisted Semantic Internet of Things (AI-SIoT) has been proposed using a wireless sensor network (WSN) for the environmental monitoring system and the real economy. The Artificial Intelligence technique can very effectively analyze data and make precise decisions on the provision of services in different types. This study provides a mathematical framework for the analysis of interdependent aspects of the WSN protocol for communication and design of signal processing. The Internet of Things (IoT) based framework comprises the complete information system from the sensor level to data management about the environment. The experimental results show that the proposed method provides an effective way to analyze the long-term monitoring of environmental data. The proposed AI-SIoT method using the WSN method enhances accuracy(95.6%), performance(98.7%) increase efficiency (93.7%) with reliability (97.4%) when compared to other existing methods. 相似文献
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对南通市楼顶式移动基站电磁辐射污染进行了调查。结果表明,南通市418个楼顶站基站周边地面50 m范围内电磁辐射功率密度值均能满足《电磁环境控制限值》(GB 8702—2014)的要求;楼顶美化天线、集束天线和景观塔等建设较晚的楼顶塔形地面电磁辐射强度相对较小,楼顶角钢塔、拉线塔和抱杆等建设较早的塔形地面电磁辐射强度相对较大;楼顶塔所在楼顶平台监测值存在轻度超标的情况。提出,应严格控制楼顶塔所在楼顶的人员可达性,即基站电磁辐射防护区应高出楼顶2 m以上,避免公众进入基站电磁辐射防护区内,受到基站天线的过量辐射影响。 相似文献
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为了解南通市移动通信基站电磁辐射时空分布特征,随机实测504座典型基站,着重从水平和垂直方向50 m范围内开展监测,并选取典型基站开展24 h连续监测。结果表明,南通市移动通信基站电磁辐射水平满足《电磁环境控制限值》(GB 8702—2014)中公众曝露控制限值要求;基站电磁辐射水平分布随距离增大呈现先增加后逐渐减小的趋势,地面最大投射点的距离基本为20~30 m;垂直方向最大监测值出现在与天线高度相近的楼层;24 h基站电场强度随时间呈明显变化,与话务量和数据流量分别进行相关性分析,相关系数为0.968 3和0.709 8,说明目前话务量仍是电磁辐射强度的重要影响因素。 相似文献
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长三角区域环境空气质量预测预警体系建设的思考 总被引:10,自引:8,他引:2
世博会期间长三角区域空气质量自动监测网络和数据共享平台的成功搭建和有效运行,为探索长三角区域空气质量预测预警长期合作模式提供了宝贵的经验和启示。需要建立全方位区域空气质量监测网络和数据资源共享系统、源排放清单、开发区域多模式集合预报系统,构建区域多层面运作机制和会商制度,建设一批专业技术和复合型人才队伍。区域不同层面有效的管理体制机制的保障是区域环境空气质量预测预警体系的基础支撑。 相似文献
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重庆市住宅楼环境电磁辐射的初步测量与分析 总被引:1,自引:1,他引:0
初步探测重庆市住宅楼环境电磁辐射的现状及其影响因素,为建立人居环境电磁场特征数据库提供依据。按照国家标准的要求和方法,在重庆市选择4个典型居住小区,分别测量各小区住宅楼不同楼层电梯门口或楼梯间以及各住宅楼楼顶的电磁辐射水平,结果表明,本次横断面调查中,在1MHz~40GHz频段,各栋楼的综合场强为17.13~17.18V/m,已接近GB 8702-88《电磁辐射防护规定》的公众照射导出限值,各楼层间差异无统计学意义(P>0.05)。在5~1000Hz频段,各栋楼楼内综合场强分布差异无统计学意义(P>0.05),而临近高压线的住宅楼楼顶综合场强明显高于其他小区楼顶以及同一栋楼其他楼层的综合场强(P<0.05),并且该楼各楼层的磁场强度明显高于其他住宅楼(P<0.05)。所测住宅楼的环境电磁辐射水平未超出国家相应标准限制,不同楼层电磁辐射水平与极低频辐射源的分布有关。 相似文献