Abstract:

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 CO2 separate pressure the correlation coefficient was obtained and pointed out the relationship between CO2 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