A Comprehensive Evaluation Of Environmental Noise Pollution In Linxia City Based On Grid Method

We monitored the road traffic noise and area noise in Linxia city by the grid method, and evaluated them by the Secondary Fuzzy Comprehensive Evaluation Method. The results showed that:①The Leq of traffic noise in Linxia city were between65.1dB (A) and76.6dB (A), with an average of69.4dB (A);31.3%of the monitoring values were out of limits; One of the longest road were between67and70dB (A), accounted for44.1%of the transportation corridors’ total length, with an over rate of24.1%according to road longth statistics.②The whole standard of the traffic noise in Linxia city was less better; Qianyanhe road and Tuanjie road were average; while the others were in the state of good except Binhe road and Huanchengxi road which were less better.③The results of area noise in linxia city showed that:The Leq of level1area in Linxia city during the day were between37.5and54.4dB (A) with an average of46.3dB (A); The Leq were between32.1and53.0dB (A) with an average of42.5dB (A) at night; There were72points in the limits, with a rate of84.7%to the total number of level1area points. The Leq of level2area in Linxia city during the day were between39.3and65.8dB (A) with an average of52.3dB (A); There were119points in the limits, with a rate of87.5%to the total number of level2area points. The Leq of level3area in Linxia city during the day were between43.0and53.6dB (A) with an average of48.2dB (A); The Leq were between42.6and47.7dB (A) with an average of45.0dB (A) at night; The whole points of level3area were in the limits.④The whole standard of the area noise in Linxia city was less better; The level1area was less better; while the others were in the state of good.