洱海动态水环境容量模拟研究  

Modeling study of dynamic environmental capacity of Erhai Lake

作　　者：卫志宏[1] 杨振祥[1] 吕兴菊[1] 唐雄飞[1] 孟良[1] 朱江[1] 杨四坤[1] 窦嘉顺[1] 

机构地区：[1]中国大理洱海湖泊研究中心,大理671000

出　　处：《生态科学》2013年第3期282-289,共8页Ecological Science

基　　金：国家洱海水专项(2008ZX07105-006);(2013ZX07105-005)

摘　　要：基于环境流体动力学模型EFDC(Environmental Fluid Dynamic Code),建立了洱海湖泊及湖湾的三维水动力水质模型。并利用2001-2010年的气象水文数据对洱海的水动力水质状况进行了连续10年的数值模拟,模拟结果与实测结果吻合度较好,表明水动力水质模型计算结果较为合理。应用建立的数值模型分析了洱海的水流、水位和水质的时空变化特征,并在此基础上计算分析主要水质因子的动态水环境容量。结果表明,若以地表水二类水标准为规划目标,洱海总氮(TN)、总磷(TP)、CODMn和BOD5的平均环境容量分别为1 150、72、12 780和10 093吨/年。洱海三维水动力水质模型的建立,为洱海的水环境保护工作提供了一个重要的管理和分析技术平台,对于洱海地区的污染物总量控制具有重要的意义。A three-dimensional hydrodynamic and water quality model was developed for Erhai Lake based on the Environmental Fluid Dynamic Code （EFDC）. A continuous 10-year simulation of water quality conditions in Erhai Lake was conducted with the model for the period from 2001 to 2010. The simulated results were in good agreement with observed data, indicating that the model simulation results were accurate and reasonable. The hydrodynamic and water quality model was used to analyze the seasonal and spatial changes of lake current circulation, water level variation and water quality condition. The dynamic environmental capacity of the lake was then determined based on the modeling results for main water quality constituents. The assimilative capacity of the lake was determined to be 1 150, 72, 12 780 and 10 093 tons per year for TN, TP, CODMn and BODs, respectively, with respect to the Class II national surface water quality standards. The three-dimensional hydrodynamic and water quality model developed for Erhai Lake provides an important technological platform for protection of Erhai Lake water quality, and is instrumental for developing regulation and management strategies for water pollution control of the Erhai Lake watershed.

关 键 词：洱海 EFDC 环境容量 水动力 水质 

分 类 号：X82[环境科学与工程—环境工程]