重庆市社区环境电磁辐射监测结果分析

Electromagnetic radiation monitoring in residential districts of Chongqing city

目的通过测量居民社区环境电磁辐射强度,了解重庆市居民区环境电磁辐射的水平和特点,并分析其可能的影响因素。方法根据国家有关导则和评价标准的要求和方法,随机选择重庆市4个普通的居民区和一个大学校区,分别测量各区建筑物外人群活动集中的若干地点距地面1.7m高度处的电磁辐射强度。结果所测重庆市5个区的100 KHz～800 MHz和700 MHz～3 GHz电磁波的综合电场强度测量结果的最大值分别为3.77和4.35 V/m,均未超过国家环境卫生标准一级安全区限值;3区和5区的复合功率密度所测得的个别值已超标,最大值已达22.9和20μW/cm2。结论重庆市现有环境电磁辐射水平(包括高压线、环境的绿化及建筑材料、建筑布局、各种线缆的布置)对居民区环境电磁辐射水平有重要影响,值得深入研究。

Objective To investigate the level and characteristics of electromagnetic radiation and its influence factors in residential environments of Chongqing city.Methods According to the national hygienic standard and national recommecdations in《Manage Guideline of Protect to Radiation Environment》（HJ/T10-1996）,four residential communities and a college were selected randomly.The outdoor electromagnetic radiations were measured 1.7m above the ground.Results The maximum values of general electric field strength at five communities were 3.77V / m and 4.35 V / m and within the national first grade standards for safe area limits of 100 KHz-800 MHz and 700 MHz-3 GHz in electromagnetic radiation.There were several values of composite power density at two conmunities exceeding the national standard with the maximum of 22.9 μW/cm2 and 20 μW/cm2.Conclusion High voltage electrical wire,environmental greening,building materials,building layout and the layout of various power lines have important impacts on the level of electromagnetic radiation in living environment and the situation needs to be studied further.