基于水质改善目标的太湖适宜换水周期分析  

Research on appropriate hydraulic retention time on basis of water quality improvement of Lake Taihu

作　　者：王冼民[1] 翟淑华[2] 张红举[2] 胡维平[3] 李钦钦[4] 韩涛[3] 

机构地区：[1]广东海洋大学农学院资源与环境系,湛江524088 [2]水利部太湖流域管理局水保局,上海200434 [3]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京210008 [4]中国科学院大学,北京100049

出　　处：《湖泊科学》2017年第1期9-21,共13页Journal of Lake Sciences

基　　金：国家自然科学基金项目(51409049)资助

摘　　要：准确估算换水周期对于研究湖泊水体化学、生物变化以及污染物迁移、扩散、转化有着重要意义,换水周期是湖泊的一个重要环境参数.根据2010年实测水文、气象和环湖水量、水质条件,建立3组情景模式:第1组为实况方案,第2组是环湖水量倍比缩放方案,第3组为望虞河水量倍比缩放方案.采用EcoTaihu模型模拟3组情景模式下太湖及各湖区营养盐状况,并根据实测结果对模型进行校验.模型计算结果表明:在2010年太湖水文、气象条件下,150~160 d换水周期条件下太湖氮、磷浓度最低,即太湖适宜换水周期为150~160 d.Hydrolie retention time in an aquatic environment of lake water has long been of interest to biological limnologists because it is very important for determining lacustrine ecosystem health and sensitive to pollution threats. To evaluate the retention time of Lake Taihu, three scenarios are set up according to the measured data of hydrological, meteorological, boundary conditions of water quantity and quality around the lake in 2010, in which the first is the real scheme, the second is the inflow flux multiplier scheme around the lake, and the last is Wangyu River inflow flux multiplier scheme. EcoTaihu Model is adopted to simulate the nutrients conditions in Lake Taihu and its subzones. The results show that under the hydrological, meteorological and the boundary conditions in 2010, an appropriate hydraulic retention time of Lake Taihu is between 150 days and 160 days.

关 键 词：换水周期 EcoTaihu模型 太湖 营养物质循环 富营养化 

分 类 号：X524[环境科学与工程—环境工程] X143