河道型水库富营养化演变过程监测分析  

Monitoring and analysis of evolution process of eutrophication in channel reservoirs

作　　者：郑铁刚[1,2] 戴会超[1,2] 王玲玲[2] 毛劲乔[1,2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水利水电学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2011年第3期254-258,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(50779028);国家杰出青年基金(50925932)

摘　　要：根据河道型水库的特点,以三峡水库为例,对水库2002—2005年间的总磷浓度、总氮浓度、藻类细胞密度的监测资料进行了系统的对比分析,结合库区内营养盐排放,对比了蓄水前后氮磷比变化情况.监测分析结果表明:河道型水库蓄水前后产生了由"河流型硅藻类到湖泊型蓝、绿藻类"的演变趋势,并有明显的季节性差异;河道型水库蓄水使水库总磷沉降作用加速;抑制库区磷排放和利用支流上游的水工建筑物或动力工程增加水动力是控制河道型水库富营养化的有效途径.According to the characteristics of channel reservoirs,taking Three Gorges Reservoir as an example,a comparative analysis of monitoring data of the total phosphorus（TP） concentration,the total nitrogen（TN） concentration and the algae cell density during 2002-2005 in the reservoir area was performed.Combined with the discharge of nutrient salt in reservoir area,the ratio of nitrogen to phosphorus before and after impoundment of Three Gorges Reservoir was compared.The analytic results indicate that an evolution trend ＂from river diatomeae to lake blue and green algae＂ is aroused during the process of impoundment in channel reservoirs,and seasonal difference is significant.The settling of TP in reservoirs is accelerated because of the reservoir impoundment.The effective ways to control eutrophication of channel reservoirs are to control discharge of phosphorus in the reservoir area and to enhance hydrodynamics by using hydraulic structures or projects in the upper reaches of river branches.

关 键 词：河道型水库 富营养化 藻华 三峡水库 

分 类 号：X524[环境科学与工程—环境工程] P343.3[天文地球—水文科学]