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The Dynamic Variation of Nitrogen Contents in the Water-Body of Da Yuan Du Reservoir before and after the Dam's Joint

XU Jin-sheng, DENG Jian, YUAN Ya-li, CHEN Wen (1. Department of Chemistry and Materials Science. Hengyang Normal University. Hengyang Hunan 421008. China: 2. College of Chemistry and Chemical Engineering of Nanhua University. Hengyang Hunan 421001. China: 3. Hengyang Environmental Protection Monitoring Station. Hengyang Hunan 121001. China)  
In order to evaluate space-time variations of nitrogen contents in the water-body of Da Yuan Du reservoir before and after the dam was jointed, monitoring data of nitrogen content of the different river sections from 1993 to 2002 in the water body were studied. The results show that nitrite and nitrate contents in the water body tend to increase yearly. The variation of ammonia contents is very great , and it is one the exceeding quota in the water body of reservoir. The variation of nitrogen contents in water body is not distinct before and after the dam was jointed.
【CateGory Index】: X52
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