| 丰水期环太湖河流与湖区水质比较研究 |
| 摘要点击 3321 全文点击 2267 投稿时间：2010-11-11 修订日期：2011-03-07 |
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| 中文关键词 太湖 河流 丰水期 营养盐 水质 |
| 英文关键词 Lake Taihu rivers high water period nutrient water quality |
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| 中文摘要 |
| 鉴于环湖河流水质在汛期对太湖的关键性影响，以藻类对不同形态营养盐的利用程度为标准，2008年丰水期对太湖周边32条主要河流的水质进行了细化研究，旨在为太湖的外源河流综合整治提供依据.结果表明，采样河流中望虞河水体的营养盐和悬浮物(SS)浓度都居于最高，水质为劣Ⅴ类； 太湖北部河流水体除了营养盐浓度为劣Ⅴ类外，有机质污染在环湖河流中最为严重，北部河流水体可酶解磷(EHP)的平均浓度达到了0.240 mg/L，占总磷的62.4%，位居首位；太湖西部河流显著的特点是亚硝态氮(NO-2-N)浓度异常高，平均浓度达到了0.270 mg/L，是环湖其它河流的2～3倍.太湖北部入湖河流的氮、磷、有机质浓度都明显高于北部湖区，太湖西部入湖河流主要是氮浓度明显高于对应湖区.河流与湖区的氮磷比（TN/TP）表明藻类和沉积物再悬浮对水体的磷含量影响很大。 |
| 英文摘要 |
| Thirty-two main rivers around Lake Taihu were sampled during high water period in 2008 to investigate river's vital impact on Lake water quality. Different forms of nitrogen and phosphorus were analyzed for the 32 river water samples according to nutrients function to algae. The aim of this study is to provide the basic information for river rehabilitation. Based on the results, the nutrients and suspended substance(SS) concentrations of Wangyu River were the highest, its water quality was below theⅤ grade(Chinese water quality criterion). Water quality of northern rivers was also below the Ⅴ grade, organic matter and enzymatically hydrolysable phosphate(EHP) concentration were the highest. The EHP concentration was 0.240 mg/L, and accounted for 62.4% of total phosphorus(TP). Nitrite nitrogen(NO-2-N) concentration was exceptionally high in western rivers and the average concentration was 0.270 mg/L, it was 2-3 times higher than that of other rivers. The northern rivers' nitrogen, phosphorus and organic concentration were markedly higher than those in the north Lake region, while the western rivers' nitrogen was markedly higher than that in the west Lake region. It can also be concluded that algae and suspended sediment were able to bring more phosphorus to water by comparing the ratio of total nitrogen(TN) and TP in these rivers and Lake Taihu. |
