中文摘要：

为研究河道型水库二氧化碳释放特征，于2009年5月利用喷淋-鼓泡式平衡器-非分散红外检测器系统对万安水库二氧化碳分压[P（CO2）]进行了走航观测，并比较了入库水体和出库水体P（CO2）特征．结果表明，水库入库水体章水、梅江、桃江都具有很高的二氧化碳分压，分别为211．5、91．7、259．7Pa；走航结果表明库区来水P（CO2）区间为180—210Pa，库区中段P（CO2）区间为140～180Pa，库区坝Up（CO2）区间为70-110Pa；水库出水P（CO2）为176．2Pa，高于坝前表层水体；万安水库入库水体、库区水体、出库水体都表现为大气CO2的源，但是水库对河流温室气体释放的减缓作用明显．

英文摘要：

In order to understand the emission of greenhouse gases（CO2 ） from the river-type reservoir, this study investigated the partial pressure of CO2 [p（CO2 ）], in the surface water, inflow waters, outflow waters of the Wan＇an reservoir in China in the May 2009. p（ CO2 ） in the inflow water, outflow water were calculated from titration method, and the surface water p（ CO2） was measured underway using a continuous measurement system （equilibrator-NDIR system ）. Results showed that the inflow water from the Zhangshui, Meijiang, Taojiang have higher p（ CO2 ） than atmosphere level, with the values of 211.5, 91.7, 259.7 Pa respectively. p（CO2） in the surface water of the incoming section of Wan＇ an reservoir was between 180-210 Pa, and in the middle section and central section near the dam, p（CO2） in the surface water were about 140-180 Pa and 70-110 Pa . In the outflow waters, p（CO2） reached to 176.2 Pa, higher than that in central section. As a result, it can be concluded that the surface water, inflow waters, outflow waters in the Wan＇an reservoir are all the source to CO2. However there is clear evidence showing that the reservoir indeed has a role in mitigating the CO2 emission in this case.