Dust emission characteristics of construction activities in Chengdu
FAN Wu-bo1,2, CHEN Jun-hui1, TANG Bin-yan1, FENG Xiao-qiong1, SUN Hai-long3, ZHANG Yi1, WANG Jie1, JIN Chen-yang1, LUO li-hong1, JIANG Tao4, WU Kai4, SUN Shu1, JIANG Tao1, QIAN Jun1, LIU Zheng1
1. Sichuan Academy of Environment Sciences, Chengdu 610041, China; 2. Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu 610207, China; 3. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China; 4. Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmosphere Sciences, Chengdu University of Information Technology, Chengdu 610225, China
Abstract：Based on dust emission monitoring data from 112 construction sites including various types of buildings and municipal engineering sites in Chengdu with Dust TRAK TM aerosol (dust) monitor, the emission characteristics of different construction sites and their downwind dust concentration trend were studied. Additionally, the CALPUFF software was used to simulate the diffusion characteristics of one construction site in Xindu District of Chengdu. The results showed that the dust emission concentration ranged between 0.13 and 2.91mg/m3 in Chengdu. The average dust concentration at house construction sites was 0.94mg/m3, which was higher than that at municipal construction sites. The dust concentration at medium and small construction sites was higher than the average concentration of 0.61mg/m3 at large construction sites. The average dust concentration at earthwork construction phase was about 1.21mg/m3, which was much higher than those at the foundation construction, main construction, and decoration phases. The dust emission concentration showed a periodic alternation between high and low in Chengdu. The maximum difference between high and low concentration at the earthwork construction phase reached 0.6mg/m3. The dust concentration increased in the 5 to 15m downwind area of the plant boundary, and then decreased to a stable level (0.1~0.2mg/m3) at the distance around 50m. The CALPUFF model showed the capacity to simulate the diffusion trend of construction dust in Chengdu from the macro perspective, however it was still a challenge to capture the detailed diffusion characteristics of construction dust in the downwind direction.
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