CH_4 Concentrations and Emissions from Three Rivers in the Chaohu Lake Watershed in Southeast China

查看全文 作　　者：YANG Li-[1,2]biao;LI Xin-[1]yan;YAN Wei-[1]jin;MA [1]Pei;WANG Jia-[1]ning

机构地区：[1]Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, P.R.China;[2]Graduate University, Chinese Academy of Sciences, Beijing 100049, P.R. China

出　　处：《Journal of Integrative Agriculture》索引2012年第11卷第4期,共9页

基　　金：supported by the National Natural Science Foundation of China(20777073) 摘　　要：This study was conducted at three rivers of the Chaohu Lake watershed during the summer season of 2008,aiming to investigate the diurnal variations of dissolved CH4 concentrations and emissions,as well as the dynamics of CH4 accumulation emission rates over consecutive 72 h.The results showed that CH4 concentrations in the Fengle,Hangbu,and Nanfei rivers ranged from 56.33-124.79,160.82-341.03,and 213.49-716.81 nmol L-1,respectively,over a daily cycle;while the saturation of CH4 ranged from 188.72-418.07,538.74-1 142.46,and 715.23-2 401.38%,respectively,which indicated that surface waters were in all cases oversaturated with respect to the atmosphere.An obvious diurnal variation pattern of the dissolved CH4 concentrations demonstrated a higher value during daytime but a lower value for night time.Additionally,the highest dissolved CH4 concentrations were detected in the Nanfei River which received substantial urban wastewater discharges.CH4 emissions measured with floating chambers ranged from 5.82-15.46,5.77-8.41,and 13.51-49.25 mg C m-2 h-1 for the Fengle,Hangbu,and Nanfei rivers,respectively,over a daily cycle.Significantly higher CH4 emissions were also observed from the Nanfei River.The accumulative CH4 emissions for each river increased with time,while a decline trend on the accumulation rates was investigated over the consecutive 72 h. 关键词：甲烷排放量甲烷浓度巢湖流域中国东南三江源昼夜变化规律时间价值城市污水排放

相关文献

参考文献（46）
引证文献（12）
耦合文献（7）

参考文献(46)

引证文献(12)

耦合文献(7)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

CH_4 Concentrations and Emissions from Three Rivers in the Chaohu Lake Watershed in Southeast China

参考文献(46)

引证文献(12)

耦合文献(7)

用户提示