基于分期分区控制思想的洱海总磷水环境容量计算  

Erhai TP Water Enviromental Capacity Calculation Based on Idea of Different Period and Subzone

作　　者：冯健[1] 周怀东[1] 彭文启[1] 杜霞[1] 

机构地区：[1]中国水利水电科学研究院水环境研究所,北京100038

出　　处：《水电能源科学》2013年第10期34-37,共4页Water Resources and Power

基　　金：国家水体污染控制与治理科技重大专项基金资助项目(2009ZX07105-001);中国水利水电科学研究院院专项基金资助项目(环集1330)

摘　　要：针对现有湖泊水环境容量计算方法中设计条件较为单一的问题,以洱海为例,在建立二维非恒定水动力与水质模型的基础上,基于分期分区的设计思想应用响应系数及分担率的方法,按水资源的时间分布特点划分为丰、平、枯典型年,以风向、湖流、水质分布等实际情况将洱海分为北部、中部、南部等不同分区,计算不同分期分区条件下洱海总磷水环境容量。结果表明,不同时期的水环境容量随水文条件呈现出丰水年>平水年>枯水年的变化态势;从空间分布来看,北三江和苍山十八溪约占洱海总磷水环境容量的70%左右,波罗江次之,约占20%左右,而东部河流仅占10%左右。In order to solve the problem that the design condition is single, a water environmental capacity calculation based on idea of different period and subzone is put forward. Time distribution of water resources is divided into wet, nor- mal and dry years. Considering wind direction, lake flow, pollution source and water quality concentration distribution, Erhai lake is divided into northern subarea, center subarea and southern subarea. Based on two-dimensional unsteady hy- drodynamic and water quality model, the response coefficient and share ratio method is applied to calculate the water envi- ronmental capacity of different period and subarea. The results indicate that the characteristics of water environmental ca- pacity appear situation of wet year, normal year and dry year with different hydrological conditions; from aspect of spatial distribution, water environment capacity of the North Sanjiang and Cangshan Eighteen rivers accounts for about 70% of total phosphorus; the Boluo river accounts for about 20%, while the rivers in the east accounts for only 10%.

关 键 词：二维非恒定模型 分期分区 水环境容量 分担率 

分 类 号：X524[环境科学与工程—环境工程]