| .鄱阳湖水体水质变化特征分析[J].农业环境科学学报,2013,32(6):. |
| 鄱阳湖水体水质变化特征分析 |
| Water Quality Variations in Poyang Lake |
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| DOI：10.11654/jaes.2013.06.021 |
| 中文关键词: 鄱阳湖 水质 富营养化 主成分分析 |
| 英文关键词: Poyang Lake water quality eutrophication principal component analysis |
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| 摘要点击次数: 2358 |
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| 中文摘要: |
| 为了分析鄱阳湖水体的水质变化特征，分别于２０１０年１０月与２０１１年５月采集了鄱阳湖主湖区、五河入湖口以及碟形湖的表层水样，对水质理化参数进行了测定分析。结果表明，鄱阳湖水体ＣＯＤ、ＴＮ、ＴＰ等营养参数已达到富营养化水平，水质理化参数存在显著的时空差异。其中２０１０年１０月鄱阳湖水体ＣＯＤ、ＴＮ、ＮＨ+４－Ｎ、ＮＯ-３－Ｎ含量和ＴＮ/ＴＰ均显著低于２０１１年５月的含量，与之相反，２０１０年１０月鄱阳湖水体ＴＰ、Ｃｈｌ－ａ含量显著高于２０１１年５月水体；饶河入湖口ＣＯＤ、ＴＮ、ＴＰ含量显著高于全湖其他样地，居全湖最高，而南矶山碟形湖的Ｃｈｌ－ａ显著高于其他样地。进一步的ＰＣＡ分析结果显示，影响鄱阳湖的环境因子主要为溶氧量、透光度和电导率。从样地变化来看，湖口样地、南北主湖区、抚河入湖口及三江口样地受氮磷营养盐影响较小，而其他各入湖口受碳氮磷营养盐影响较大。 |
| 英文摘要: |
| In order to analyze the variation of water quality, surface water was collected from ten sampling sites in Poyang Lake in Oct. 2010 and May 2011 respectively. The results indicated that the contents of COD, TN and TP have been subjected to eutrophication status in Lake Poyang. There were significant differences among physicochemical parameters. The contents of COD, TN, NH+4-N, NO-3-N and TN/TP in Oct. 2010 were significantly lower than those in May 2011 respectively. In contrast, the contents of TP and Chl-a were significantly higher in Oct. 2010 than May 2011. Besides, samples from Rao River Estuary have highest concentrations of COD, TN, TP, and the content of Chl-a in Nanjishan Region Estuary was significantly higher than other sampling sites. Principal component analysis revealed that water quality in Poyang Lake was mainly affected by dissolved oxygen, transmittance and conductivity. Accoding to the variation among sampling sites, water quality was affected less by nutrients of nitrogen and phosphorus in Hukou, the North and South regions of Poyang, Fu River Estuary and Sanjiangkou , while more in other sites. |
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