| “引江济太”过程中长江-望虞河-贡湖氮、磷输入特征研究 |
| 摘要点击 1891 全文点击 1308 投稿时间：2014-12-09 修订日期：2015-03-25 |
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| 中文关键词 引江济太 长江 望虞河 贡湖 营养盐 |
| 英文关键词 water transfers on Lake Taihu from the Yangtze River the Yangtze River Wangyu River Gonghu Bay nutrients |
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| 中文摘要 |
| 为了解"引江济太"调水过程中长江、望虞河对贡湖营养盐输入特征,于2013年8月和2013年12月引水期间对20个采样点各形态N、P质量浓度的沿程和时间变化以及百分含量占比进行研究. 结果表明,两个不同的引水期,长江-望虞河-贡湖段水体各形态N、P沿程和时间变化均表现不一:长江引水经望虞河入贡湖后,水体NO2--N、NO3--N、NH4+-N和TN质量浓度均较长江和望虞河段有不同程度的降低,而贡湖段DON质量浓度显著高于长江和望虞河段,但长江-望虞河段水体各形态N中NO3--N质量浓度最高. 长江和望虞河TP质量浓度总体表现平稳,而各形态P质量浓度在两个引水时期内有所变化. 从时间变化来看,2013年8月水体的DON和TP质量浓度总体上高于12月; 而NO3--N和DOP质量浓度总体上低于12月. 总体来说,两个引水时期内, NO3--N和TPP是望虞河经长江引水的主要N、P形态; 而贡湖经望虞河水体输入的N、P主要形态分别为NO3--N、PO43--P和TPP. |
| 英文摘要 |
| Overall 20 surface water samples were collected from the Yangtze River, the Wangyu River and the Gonghu Bay (Lake Taihu) to clarify the pollution characteristics of nitrogen and phosphorus during 2 sample stages of "Water Transfers on Lake Taihu from the Yangtze River" in August and December of 2013 respectively. The results showed that the mass concentrations of NO2--N, NO3--N, NH4+-N and TN in the Gonghu Bay were lower than those of the Yangtze River and Wangyu River during the 2 water transfer processes. However, there was higher level of DON content in the Gonghu Bay than that of the Yangtze River and Wangyu River. The percentages of various N species showed that NO3--N was the major N species in the Yangtze River and Wangyu River during the 2 water transfer processes. TP contents in samples collected from the Yangtze River displayed a constant trend compared with the Wangyu River. However, the percentages of various P species were different with each other during the 2 water transfer processes. Mass concentrations of DON and TP in surface water in August were higher than those in December and the contents of NO3--N and TDP were lower in August than those in December.In general, NO3--N and TPP were the main N and P species in Wangyu River from the Yangtze River. NO3--N, PO43--P and TPP were the main N and P species in Gonghu Bay from Wangyu River during the 2 water transfer processes. |
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