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《Research of Environmental Sciences》 2008-01
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Release of N,P from Submerged Soil in the Shore-Area of Three Gorges Reservoir

YUAN Hui~1,WANG Li-ao~2,HU Gang~2,ZHAN Yan-hui~2Information Consultant Department of Library,Chongqing University,Chongqing 400030,China2.College of Resource and Environmental Science,Chongqing University,Chongqing 400030,China  
After the construction of final water impoundment completes,the submerged soil in the shore area of Three Gorges Reservoir will release N and P elements into the water.Based on simulating submerging experiments with river water of origin soil sample and soil sample pretreated with nutrients,and daily water change submerging experiment of origin soil sample,it is concluded that: after the first 10~15 d of the high water level operation period of the dam, the concentration of TP and TN in the water trends to be in equilibrium,but the disturbance of the water can cause a rise of TP and TN concentration.In the simulating experiment of origin soil,the submerged soil sample had a certain ability of P absorption which declined the TP concentration by 33.4%.The results shows that the TP and TN concentration curve well conform to the first order kinetics models except the TN concentration curve of river water submerging experiment.
【Fund】: 重庆市发展和改革委员会及重庆市科学技术委员会项目(03-26)
【CateGory Index】: X132
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