| 南四湖水体氮、磷营养盐时空分布特征及营养状态评价 |
| 摘要点击 1484 全文点击 1082 投稿时间：2012-01-18 修订日期：2012-05-09 |
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| 中文关键词 南四湖 总氮 总磷 综合营养状态指数 富营养化 |
| 英文关键词 Lake Nansi total nitrogen (TN) total phosphorus (TP) comprehensive nutrition state index eutrophication |
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| 中文摘要 |
| 分析了南四湖水体TN和TP的时空变化规律,并采用综合营养状态指数(TSI)对其营养状态进行了评价. 结果表明,南四湖水体TN和TP含量分别为2.617 mg·L-1和0.110 mg·L-1; 空间上各湖区水体TN和TP含量存在显著差异,TN和TP含量均以南阳湖最高,分别为3.830 mg·L-1和0.192 mg·L-1,独山湖TN含量(2.106 mg·L-1)最低,而微山湖TP含量(0.067 mg·L-1)最低; 南四湖水体中TN含量的季节差异不显著,但夏季(2.805 mg·L-1)和春季(3.049 mg·L-1)明显高于秋季(2.160 mg·L-1)和冬季(2.452 mg·L-1),各湖区TN的季节变化没有一致规律; 南四湖及各湖区TP含量具有显著的季节差异,变化趋势均为夏季＞春季＞秋季＞冬季. 总体来看,南四湖处于轻度富营养化状态. 其中,南阳湖富营养化最严重,处于中度富营养化状态,其它3个湖区均为轻度富营养化. 综合分析表明外源污染仍是南四湖污染的主要来源,湖区网箱养殖和围网养殖所产生的污染应引起高度重视. |
| 英文摘要 |
| Based on the seasonally investigating data from Lake Nansi during 2010 to 2011, the spatial and temporal distribution characteristics of total nitrogen (TN) and total phosphorus (TP) in water were analyzed, and the trophic state was also assessed. The results showed that the average concentrations of TN and TP were 2.617 mg·L-1 and 0.110 mg·L-1respectively. The spatial variations of TN and TP in water were significantly different in four lake regions with the highest value of two parameters (3.830 mg·L-1and 0.192 mg·L-1 respectively) were all found in Lake Nanyang while the lowest value in Lake Dushan (2.106 mg·L-1) and Lake Weishan (0.067 mg·L-1) respectively. Seasonally, the concentrations of TN in Lake Nansi had no significant difference, but the concentrations of TN in summer (2.805 mg·L-1) and spring (3.049 mg·L-1) were obviously higher than that in autumn (2.160 mg·L-1) and winter (2.452 mg·L-1), and that in four lake regions showed no uniform variation trends. While the seasonal change of the concentrations of TP in water were significantly different not only in Lake Nansi but also in its four lake regions, the variation trends were uniform with summer＞spring＞autumn＞winter. Generally, the water quality of Lake Nansi has reached light eutrophication, among which, Lake Nanyang was in middle eutrophic state, while other three lake regions were in light eutrophic state. Integrated analysis indicted that external pollution was still the main influence factors of water quality in Lake Nansi, meanwhile, the pollution caused by pen fish culture was urgent for the control of non-point pollution sources. |
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