4.Key Waterways Restored

For the forty cross sections examined for key waterways urban wide, the WQII ranges from 2.300 to 8.254.Compared with 2005, in 22 comparable cross sections, 81.8% of them maintains a good or even better water quality, 18.2% have a degraded water quality. In general, there is little improvement in water quality for these key waterways examined.

22.5% of the total cross sections examined for key waterways are black and smelly. WQII for 7 out of comparable sections is above 7.0, indicating black and odor, (31.8% of the total sections examined). There are fewer black and odor sections than in 2005.

5.Cross Sections For District Waterways Examined

The examination of water quality at local level involves 16 districts, with 35 waterways and 48 cross sections all together, the comprehensive WQII ranges from 2.200 to 7.842. Compared with 2005, in 45 comparable cross sections, 57.8% of them maintain a stable water quality, 22.2% have made some improvement and 20.0% have a degraded water quality. In general, water quality city wide keeps a similar level to that in 2005 and the amount of black and smelly waterways are lessened.

IIIŁ®Ambient Acoustic Environment

In 2006, the regional environmental noise met the standard requirement of corresponding functions, while the traffic noise failed to meet its corresponding functional requirement.

 

1. Regional Ambient Noise
In 2006, the average equivalent sound level for the regional ambient noise was 56.6dB(A) in the day time, 0.7db(A) lower than that in 2005. And it was 49.7dB(A) at night, 0.1dB(A) lower than that in 2005.

The monitoring data of recent five years (2002-2006) indicated that the regional ambient noise was compliant with the corresponding functional requirement, the overall level of which was stable.