| 峡谷型水源水库的氮、磷季节变化及其来源分析 |
| 摘要点击 2634 全文点击 1523 投稿时间：2012-12-22 修订日期：2013-01-29 |
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| 中文关键词 水库 营养盐 季节变化 外源 内源 沉积物 |
| 英文关键词 reservoir nutrition seasonal variation exogenous pollution endogenous pollution sediment |
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| 中文摘要 |
| 石砭峪水库总氮 (TN)和总磷 (TP)的质量浓度均值分别为2.67 mg ·L-1和0.04 mg ·L-1,其在丰水期最大,平水期次之,枯水期最小; 水库富营养化严重,叶绿素a含量和藻细胞密度分别高达 50 mg ·m-3和10000×104 cells ·L-1. 水库TN的年输入和输出负荷分别为203.1 t和181.3 t,而TP的年输入和输出负荷分别为4.2 t和4.1 t; 外源输入水库的TN和TP负荷均占各自总输入负荷的90%以上; 就全年而言,水库沉积物表现为蓄积作用,TN和TP年净积累量分别约为20.2 t和0.8 t; 内源污染控制是水库污染控制的关键. |
| 英文摘要 |
| According to a continuous survey on Shibianyu Reservoir located north of the Qinling Mountains which lasted for about one and a half years and a simulation study in laboratory, conclusions were drawn as follows. The average concentrations of total nitrogen (TN) and total phosphorus (TP) were 2.67 mg ·L-1 and 0.04 mg ·L-1, respectively, and the highest values were recorded in the high flow period followed by the median water period, while the lowest values were found in the dry period. The reservoir was in severe eutrophication and the content of chlorophyll a and algal cell density reached 50 mg ·m-3 and 10000×104 cells ·L-1, respectively. The yearly input and output of TN was respectively 203.1 t and 181.3 t, while the yearly input and output of TP was respectively 4.2 t and 4.1 t. Exogenous pollution accounted for more than 90% of the total load. The sediment in reservoir showed an accumulation tendency all year round and the net annual accumulation of TN and TP was 20.2 t and 0.8 t, respectively. The key of controlling reservoir pollution is to control the endogenous pollution. |
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