摘要
采用EFDC模型对实测风场和吞吐流作用下的太湖流场进行了数值模拟,水位模拟结果与实测值符合较好,结果表明该模型可以适用于太湖流场的数值模拟。在此基础上详细分析了不同风场,地形及吞吐流条件对太湖水动力特性的影响。比较各种方案的流场可知,风对太湖流场结构起主导作用,风场是影响湖流的最敏感的因素;湖底地形的变化对各层风生流场有一定的影响;吞吐流对整个湖泊水流结构影响微弱,对湖泊出入口局部水域水流流态有一定影响;在静风条件下,湖泊水流主要由吞吐流驱动,吞吐流对出入口局部水域水流流态有较大影响。
The wind-driven flows in Lake Tai were numerically simulated using the EFDC model and the calculations agree with the observed data of water level. This shows that the model is applicable to this study. We analyzed the influences of wind field, topography and inflow/outflow on the flow characteristics Qf this lake. The wind plays a vital role in determination of the flow structure and it is the most sensitive factor. The influence of lake topography is significant while inflow and outflow have little effect. In the windless condition, however, the lake flow is primarily driven by the inflow and outflow that are major factors to the flow patterns in the vicinities of lake inlet and outlet.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第6期165-171,共7页
Journal of Hydroelectric Engineering
基金
国家重点基础研究发展计划项目(2013CB430403)
国家自然科学基金项目(51279023)
关键词
环境水力学
水动力特性
EFDC
风场
地形
吞吐流
environmental hydrodynamics
hydrodynamic characteristics
EFDC
wind field
lake topography
inflow/outflow
