2006
| Index |
| Preface |
| Water Environment |
| Marine Environment |
| Atmospheric Environment |
| Acoustic Environment |
| Solid Waste |
| Radiation Environment |
| Natural Ecology |
| Arable Land and Rural Environment |
| Forest |
| Grassland |
| Climate and Natural Disasters |
| Environmental Management |
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General Situation Regional Environmental Noise Among the 378 cities (counties) covered by urban regional environmental noise monitoring, 19 cities (5.0%) had good urban area-wide acoustic environment, 241 cities (63.8%) had fairly good area-wide acoustic environment, 111 cities (29.3%) registered light noise pollution while 6 cities (1.6%) and 1 city (0.3%) respectively recorded medium and heavy noise pollution. State of Urban Regional Acoustic Environment in 2006 Of the 112 national key cities on environmental protection monitored (excluding Zunyi City, the same as below), the range of equivalent sound level of area-wide environmental noise was within 47.0กซ62.7dB(A), and the area weighted average of the equivalent sound level was 54.5 dB(A). 78 cities (69.6%) enjoyed fairly good acoustic environment in urban areas, 32 cities (28.6%) had light noise pollution, and 2 cities (1.8%) had medium noise pollution. Compared with 2005 and out of the 111 comparable cities, 17 cities witnessed over 1dB(A) (including 1dB(A)) reduction of average equivalent sound level, and 11 cities experienced over 1dB(A) of growth (including 1dB(A)) in average equivalent sound level.
(Cities listed are all of the change range of or over 1dB (A)) Year-on-year Comparison of Equivalent Sound Level of Urban Area-wide Noise of Key Cities Road Traffic Noise Among the 398 cities (counties) covered by road traffic noise monitoring, the average equivalent sound level of 229 cities (57.5%) was at or below 68.0 dB(A); 124 cities (31.2%) was within the range of 68.0 to 70.0 dB(A); 34 cities (8.5%) was within the range of 70.0 to 72.0 dB(A); 7 cities (1.8%) was within the range of 72.0 to 74.0 dB(A) and 4 cities (1.0%) were above the level of 74.0 dB(A).
State of Acoustic Environment of Urban Traffic Noise in 2006 The monitored road length of the 112 national key cities on environmental protection totaled 13,068 km with the average equivalent sound level within the range of 61.1กซ74.7dB(A) and the road traffic weighted average of the equivalent sound level at 68.1dB(A). Among them, the equivalent sound level of 2,959.2 km exceeded 70 dB(A), accounting for 22.6% of the total length of road monitored. In 2006, 8 cities witnessed over 1dB(A) growth of average equivalent sound level in road traffic noise, and 21 cities experienced over 1dB(A) reduction out of the 112 key cities.
(Cities listed are all of the change range of or over 1dB (A)) Comparison of Equivalent Sound Level of Road Traffic Noise of Key Cities between 2006 and 2005 Urban Functional Area Noise Among the 168 cities covered by functional noise monitoring nationwide, 3,163 site.time were monitored up to standard at all the sites in various types of functional areas in daytime throughout the whole year with the up-to-the-standard rate of 82.2% in daytime; 2,504 site.time were monitored at night with the up-to-the-standard rate of 65.1% at night. On the whole, the up-to-the-standard rate was better in daytime than at night for all types of functional areas, type 3 of functional area showed higher up-to-the-standard rate than those of other types. Up-to-the-standard Status of the Monitoring Sites in Urban Functional Area
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