Study On Public Risk Perception Of And Information Communication Strategy For Electromagnetic Environment From High-Voltage Power Facilities

To obtain the electromagnetic environmental level of high viltage power facilities (HVPFs), a total of 16 operating 110kV-500kV high voltage transmission lines (HVTLs) in Zhejiang province were selected. The relative exposure intensity of power-frequency electromagnetic fields (PF-EMF) were represented by power-frequency electric field intensity (E) and magnetic flux density (B) from 1m outside the window of dwelling, which were calculated by the running paremeters using the recommended method of International Electrotechnical Commission. To investigate the public risk perception (RP) of electromagnetic environment from HVPFs and the tendency for selecting on information communication, a face-to-face questionnaire survey was carried out among 615 residents living near HVTLs. The influences of electromagnetic and non-electromagnetic factors on RP and negative feeling (NF) were discussed. Optimal regression model which used the multiple linear stepwise regression analysis were established to estimate RP and NF. To study whether PF-EMF had influence on public health, respondents were divided into inside and outside 50m from the center of HVTLs, and the difference of health status between respondents in two groups was analyzed by clarifying the relationship among the runtime of HVTLs, duration of residence and illness. Finally, the suitable public information communication strategy for the conduction of HVPFs was formulated, which is combined with the results of the survey and the influence factors of RP.Results showed that PF-RMF was close to background level when inside 50m from 110kV and 220kV HVTLs and inside 87m from 500kV HVTLs. In the scope of PF-EMF of this survey, i.e., E<0.35kV/m and B<0.80?T, RP was significantly correlated with E, while the value of RP changed little with the increasing E; RP was not correlated with B, as well as NF with E and B. Public RP and NF were significantly influenced by the size of towers, health status, voluntariness of exposure, and etc.. Television, Internet and media such as newspaper and magazine were chosen to obtain the information of high voltage power facilities and electromagnetic environment; The government, medical research and others science institution were the highest trusted institutions; Meetings (including panel discussion, feasibility study and hearing), face to face interview and questionnaire were the preferred way of public participation. Health effects of PF-EMF had a relative risk of 0.87 for respondents inside 50m compared with outside 50m from the center of HVTLs PF-EMF from HVTLs with voltage level not exceeding 500kV in the environment had no influence on health as long as the distances from dwelling to phase conductors of HVTLs met the requirement of relative design code.