峡谷型水源水库的氮、磷季节变化及其来源分析  

Studies on Seasonal Variation and Sources of Nitrogen and Phosphorus in a Canyon Reservoir Used as Water Source

作　　者：黄廷林[1] 秦昌海[1] 李璇[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西北水资源与环境生态教育部重点实验室,西安710055

出　　处：《环境科学》2013年第9期3423-3429,共7页Environmental Science

基　　金：陕西省科技统筹创新工程计划项目(2011KTCG03-07);国家自然科学基金重点项目(50830303)

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10 000×104cells.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.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 10 000 × 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.

关 键 词：水库 营养盐 季节变化 外源 内源 沉积物 

分 类 号：X524[环境科学与工程—环境工程]