三峡库区小江回水区二氧化碳分压的时空变化特征分析

2009年9月～2010年4月在三峡库区与小江交汇的回水区的典型段面测量了该区域水体表层水和水体内部两部分水体中的有关物理化学参数，并利用这些水化学特征值通过水化学平衡模型计算出该区域水体CO2的分压。得出该区域水体中的CO2分压在一定时空范围内的变化特征。并对该区域有关水质参数与CO2的分压进行了相关性分析，得出其相关系数。指出了水体CO2分压与水体碳循环的关系。通过对三峡库区小江流域这一典型回水区域水体的CO2分压的分析研究，可望为三峡库区及其它同类型区域水体的二氧化碳分压研究提供一个分析案例，也为今后进一步从事水库温室效应的研究提供参考

SPATIAL AND TEMPORAL VARIATION OF CARBON DIOXIDE PARTIAL PRESSURE OVER THE XIAOJIANG RIVER BACKWATER AREA OF THE THREE GORGES RESERVOIR

Many related physical and chemical parameters of surface and inner water body at the typical profiles of backwater area over the intersected segment of Three Gorge Reservoir and Xiaojiang River were measured from Sept.2009 to Apr.2010.And carbon dioxide partial pressure of water body in this region was calculated using hydrochemical balance model from the hydrochemical parameters mentioned above.Then the spatial and temporal distribution of carbon dioxide partial pressure in this region was acquired from this method and observed data.After analyzing the related parameters of the water quality and the CO2 separate pressure the correlation coefficient was obtained and pointed out the relationship between CO2 separate pressure and water carbon cycle.The study could provide a representative case for Three Gorge Reservoir and other homologous reservoirs by analyzing the spatial and temporal distributed characteristics of carbon dioxide partial pressure over the typical backwater area of Three Gorge Reservoir and Xiaojiang River basin,and it also played a key role for further studying greenhouse gas emission from reservoirs.