不同监测区域CH_4的浓度变化特征研究  

Variation of Concentration of Methane in Different Monitoring Area

作　　者：刘萍 唐晓[1,2] Liu Ping;Tang Xiao(Key Laboratory for City Atmospheric Environment Integrated Observation ＆ Pollution Prevention and Control of Chongqing,Chongqing 401147,China;Environmental Monitoring Center of Chongqing,Chongqing 401147,China)

机构地区：[1]城市大气环境综合观测与污染防控重庆市重点实验室,重庆401147 [2]重庆市环境监测中心,重庆401147

出　　处：《环境科学与管理》2018年第8期111-115,共5页Environmental Science and Management

基　　金：2013年重庆市基础科研业务费计划项目(2013 cstc-jbky-01610)

摘　　要：为探讨不同监测区域CH_4浓度,利用在线气象色谱仪连续在线监测四个不同监测区域。结果表明,观测期间,缙云山CH_4平均浓度值为1.904×10^(-3),并且日均浓度值变化总体趋势比较小;农村监测点日平均浓度为2.16×10^(-3);而隧道监测点整个监测期间CH_4都处于高浓度状态,均值达到了3.56×10^(-3);而城市监测点CH_4的日变化趋势呈现出一峰一谷的现象,均值为2.49×10^(-3)。由于CH_4的源不同,因此四个监测区域的CH_4浓度值表现为缙云山监测点<农村监测点<城市监测点<隧道监测点。This study explores the variation of the concentration of methane in the different monitoring area and uses the online gas chromatograph monitored in the four different areas of continuous monitoring. It discusses the characteristics methane concentration changes in the Jinyun mountain,rural,tunnels and urban. During the observation period the results showed that the average concentration is 1. 904 × 10^（-3） in the Jinyun mountain. Then the daily average concentration is changed relatively small. The daily average concentration of the rural monitoring sites is 2. 16 × 10^（-3）. The methane concentration of the tunnel monitoring sites are in a state of high concentration and the average is 3. 56 × 10^（-3）. As a comprehensive monitoring sites of the urban site,the daily trends of the methane concentration is showing a peak-valley phenomenon and the daily average concentration is 2. 49 × 10^（-3）.Due to the different sources of methane,the methane concentration of the four monitored sites showed that the Jinyun mountain rural monitoring sites urban monitoring sites tunnel monitoring sites.

关 键 词：区域 CH4 浓度特征 

分 类 号：X831[环境科学与工程—环境工程]